KALY [202010]: Preliminary Local Storm Report

NWUS51 KALY 202010
LSRALY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
410 PM EDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0350 PM FLASH FLOOD COXSACKIE 42.36N 73.81W
05/20/2011 GREENE NY LAW ENFORCEMENT

MANSION ST. CLOSED BETWEEN BAILEY ST. AND LAWRENCE AVE
DUE TO FLOODING

&&

$$

FRUGIS

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KUNR [202009]: Preliminary Local Storm Report...corrected

NWUS53 KUNR 202009
LSRUNR

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE RAPID CITY SD
209 PM MDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0200 PM FLOOD 3 SE INTERIOR 43.70N 101.94W
05/20/2011 JACKSON SD LAW ENFORCEMENT

WHITE RIVER NEAR INTERIOR IS FLOODING ON THE NORTH SIDE
OF THE RIVER. WATER IS APPROACHING THE NORTHBOUND LANE OF
HIGHWAY 44.

&&

$$

MSMITH

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KUNR [202006]: Preliminary Local Storm Report

NWUS53 KUNR 202006
LSRUNR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
206 PM MDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0200 PM FLOOD 3 SE INTERIOR 43.70N 101.94W
05/20/2011 JACKSON SD LAW ENFORCEMENT

WHITE RIVER NEAR INTERIOR IS FLOODING ON THE NORTH SIDE
OF THE RIVER. WATER IS OVER THE NORTHBOUND LANE OF
HIGHWAY 44.

&&

$$

MSMITH

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KALY [202005]: Preliminary Local Storm Report

NWUS51 KALY 202005
LSRALY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
405 PM EDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0353 PM FLASH FLOOD 3 NW POLAND 43.26N 75.10W
05/20/2011 HERKIMER NY TRAINED SPOTTER

SMALL CREEK RUNNING OVER RUSSIA RD ONE HALF MILE WEST OF
MILITARY ROAD

&&

$$

FRUGIS

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 202001
SWODY1
SPC AC 202000

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0300 PM CDT FRI MAY 20 2011

VALID 202000Z - 211200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM NERN TX TO THE MO
BOOTHEEL/WRN KY AND WRN TN...

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF THE SRN AND
CNTRL PLAINS...

...ARKLATEX TO MO BOOTHEEL/WRN TN...
ADJUSTED SLGT RISK AND RAISED HAIL AND WIND PROBABILITIES ACROSS
THESES AREAS BASED ON LATEST TRENDS. SURFACE AND UA ANALYSIS REVEALS
PRIMARILY TWO AREAS WITHIN THIS BROADER ZONE WHERE SEVERE STORMS
WILL BE MOST LIKELY THIS AFTERNOON AND EVENING. IN BETWEEN THE TWO
AREAS...GENERALLY FROM ERN OK ACROSS THE OZARKS...EXISTS A LARGE
COLD POOL WHERE AIRMASS HAS BEEN CONVECTIVELY OVERTURNED.

AREA 1) ACROSS NERN/ERN TX TO SRN AR AND NWRN LA. AIRMASS HERE HAS
BECOME STRONGLY UNSTABLE AND WEAKLY CAPPED AND WOULD EXPECT TO
CONTINUE TO SEE VERY INTENSE CONVECTION SPREAD GRADUALLY
EAST/NORTHEAST ACROSS THE REGION THROUGH THIS EVENING. MARGINAL DEEP
LAYER SHEAR ACROSS MUCH OF THE AREA SOUTH OF WELL-DEFINED OUTFLOW
BOUNDARY WILL LIKELY SUPPORT MULTICELLULAR STORMS WITH SOME THREAT
FOR WIND AND HAIL. GREATER STORM ORGANIZATION AND A POSSIBLE TORNADO
OR TWO MAY OCCUR ALONG THE OUTFLOW BOUNDARY WHERE BOTH DEEP LAYER
AND LOW LEVEL SHEAR WILL BE STRONGEST.

AREA 2) NERN AR ACROSS MO BOOTHEEL AND WRN KY/TN. LEADING EDGE OF
STRONGER CONVECTION WILL SPREAD INTO VERY WARM AIRMASS WHERE DCAPE
VALUES IN EXCESS OF 1000 J PER KG SHOULD RESULT IN AN ENHANCED WIND
THREAT THIS AFTERNOON. THIS POTENTIAL CURRENTLY EXISTS OVER A
RELATIVELY SMALL AREA AND THERE IS SOME UNCERTAINTY ABOUT THE EWD
EXTENT OF THE THREAT ACROSS THE MS RIVER. HOWEVER...LATEST RADAR
TRENDS SUGGEST AN INCREASE IN SEVERE WIND PROBABILITIES IN THIS AREA
IS WARRANTED.

...SRN/CNTRL PLAINS...
TSTMS ARE CURRENTLY DEVELOPING ALONG A COLD FRONT WHICH STRETCHES
FROM CNTRL NEB SWD INTO WRN OK. FORCING FOR ASCENT ATTENDANT TO
VORTICITY MAXIMUM PIVOTING NNEWD ACROSS THE REGION SHOULD SUPPORT AN
INCREASE IN STORM COVERAGE AND INTENSITY THROUGH THE REMAINDER OF
THE AFTERNOON. AMBIENT WARM SECTOR AIR MASS IS CHARACTERIZED BY A
GRADUALLY WARMING BOUNDARY LAYER WITH DEWPOINTS IN THE UPPER 50S TO
LOWER 60S...RESULTING IN MLCAPE VALUES OF 500-1000 J/KG. GIVEN THE
SUPERPOSITION OF MID AND UPPER-LEVEL JET AXES ALONG INSTABILITY
AXIS...SETUP WILL CONTINUE TO FAVOR THE DEVELOPMENT OF ORGANIZED
STORMS...INCLUDING SUPERCELLS AND LINE SEGMENTS CAPABLE OF HAIL AND
LOCALLY DAMAGING WIND GUSTS.

..CARBIN.. 05/20/2011

.PREV DISCUSSION... /ISSUED 1128 AM CDT FRI MAY 20 2011/

...ERN PARTS OF OK/TX INTO AR/NRN LA...

SRN EXTENSION OF NOCTURNAL QLCS IS EXPECTED TO PERSIST
TODAY...GRADUALLY MOVING/DEVELOPING EWD WITH TIME. THE INFLUX OF A
SEASONABLY MOIST AIR MASS /CHARACTERIZED BY BOUNDARY LAYER DEWPOINTS
IN UPPER 60S TO LOWER 70S/ WILL BE MAINTAINED BY A 35-45 KT SLY LLJ
WHICH SHOULD SERVE TO ENHANCE UPDRAFT STRENGTH ALONG LEADING EDGE OF
SYSTEM COLD POOL. ADDITIONAL MORE DISCRETE STORM DEVELOPMENT WILL
REMAIN POSSIBLE IN ADVANCE OF QLCS AND S OF WARM FRONT LIFTING NWD
INTO SRN MO WHERE LOW-LEVEL SHEAR WILL BE ENHANCED BY THE PRESENCE
OF THE LLJ. WHILE MID AND HIGH-LEVEL WIND FIELD WILL NOT BE
PARTICULARLY STRONG...THE PRESENCE OF 0-1 KM SRH OF 200-250 M2/S2
AND THE MOIST BOUNDARY LAYER SUGGEST A RISK FOR A FEW TORNADOES WITH
ANY SUPERCELLS THAT CAN BECOME ESTABLISHED. OTHERWISE...EXPECT
LARGER-SCALE CONVECTIVE SYSTEM TO REMAIN CAPABLE OF DAMAGING WIND
GUSTS AND HAIL TODAY INTO THIS EVENING.

FOR ADDITIONAL NEAR TERM GUIDANCE...SEE MCD 825.

...CNTRL/ERN NEB INTO WRN OK...

LATEST MODEL GUIDANCE SUGGESTS THAT BREAKS IN THE CLOUDS COUPLED
WITH HEIGHT FALLS/DYNAMIC COOLING IN THE MIDLEVELS ASSOCIATED WITH
VORTICITY MAXIMUM PIVOTING NNEWD THROUGH THE HIGH PLAINS MAY SUPPORT
A NARROW AXIS OF MODERATE INSTABILITY BY AFTERNOON IMMEDIATELY AHEAD
OF PACIFIC FRONT. THE STRONGEST DEEP-LAYER VERTICAL SHEAR /40-50
KT/ WILL RESIDE ACROSS OK INTO SRN KS...DECREASING TO 30-35 KT IN
NEB. AS SUCH...ISOLATED TO WIDELY SCATTERED STORMS /INCLUDING
SUPERCELLS/ WILL BE POSSIBLE THIS AFTERNOON INTO EVENING WITH THE
PRIMARY HAZARD BEING LARGE HAIL.

...NRN PLAINS...

AS MIDLEVEL DRY SLOT CONTINUES TO DEVELOP NWD TODAY...SOME POTENTIAL
FOR CLEARING WILL EXIST ALONG IMMEDIATE FRONT ARCING NWWD FROM CNTRL
NEB TO WEAK LOW PRESSURE OVER WRN SD. GIVEN VERTICALLY VEERING
WINDS WITH HEIGHT...BOUNDARY LAYER DEWPOINTS IN THE 50S AND A
RELATIVELY COOL THERMODYNAMIC PROFILE PER 12Z RAP SOUNDING...A RISK
FOR ISOLATED SEVERE STORMS WILL EXIST SHOULD SUFFICIENT
HEATING/DESTABILIZATION OCCUR. DUE TO UNCERTAINTY IN THE DEGREE OF
INSTABILITY THAT WILL DEVELOP LATER TODAY...LOW SEVERE WEATHER
PROBABILITIES WILL BE MAINTAINED.

...ERN CAROLINAS...

VORTICITY MAXIMUM OVER WV/VA LATE THIS MORNING WILL CONTINUE SEWD
TODAY...GLANCING THE REGION WITH WEAK HEIGHT FALLS/FORCING FOR
ASCENT. THIS MIDLEVEL SYSTEM WILL BE ATTENDED BY A WEAK SURFACE
TROUGH/COLD FRONT WHICH MAY SERVE AS THE FOCUS FOR ISOLATED TO
WIDELY SCATTERED TSTM DEVELOPMENT THIS AFTERNOON. DAYTIME HEATING
COUPLED WITH MODEST BOUNDARY LAYER MOISTURE CONTENT MAY YIELD MLCAPE
VALUES APPROACHING 500-1000 J/KG AHEAD OF FRONT. GIVEN MODESTLY
STRONG MID AND HIGH-LEVEL WNWLY FLOW OBSERVED BY 12Z SOUNDINGS...
SOME RISK FOR LOCALLY STRONG WIND GUSTS AND PERHAPS HAIL WILL EXIST
WITH ANY STORMS THAT CAN DEVELOP.

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KALY [201955]: Preliminary Local Storm Report

NWUS51 KALY 201955
LSRALY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
355 PM EDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0317 PM FLASH FLOOD MILLBROOK 41.78N 73.69W
05/20/2011 DUTCHESS NY TRAINED SPOTTER

ROUTE 44 FLOODED IN SEVERAL PLACES BETWEEN MILLBROOK AND
AMENIA.

&&

$$

11

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KGID [201955]: Preliminary Local Storm Report...summary

NWUS53 KGID 201955
LSRGID

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE HASTINGS NE
254 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0522 AM HEAVY RAIN LEBANON 39.81N 98.56W
05/20/2011 M3.10 INCH SMITH KS TRAINED SPOTTER

3.10 INCHES OF RAINFALL SINCE THURSDAY AFTERNOON

0700 AM HEAVY RAIN 4 WNW ALEXANDRIA 40.27N 97.46W
05/20/2011 M4.00 INCH THAYER NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 5 SSE CLAY CENTER 40.46N 98.02W
05/20/2011 M3.15 INCH CLAY NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 4 E RED CLOUD 40.09N 98.45W
05/20/2011 M3.50 INCH WEBSTER NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 7 SSE LAWRENCE 40.20N 98.21W
05/20/2011 M3.91 INCH NUCKOLLS NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 6 N NELSON 40.29N 98.07W
05/20/2011 M3.98 INCH NUCKOLLS NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 5 SSE DEWEESE 40.29N 98.10W
05/20/2011 M4.12 INCH NUCKOLLS NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 2 S FAIRFIELD 40.40N 98.10W
05/20/2011 M3.58 INCH CLAY NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 5 SSW TOBIAS 40.35N 97.37W
05/20/2011 M3.60 INCH THAYER NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 2 WSW TOBIAS 40.41N 97.37W
05/20/2011 M3.66 INCH FILLMORE NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 5 S CLAY CENTER 40.45N 98.05W
05/20/2011 M3.70 INCH CLAY NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0700 AM HEAVY RAIN 8 NW SUPERIOR 40.10N 98.17W
05/20/2011 M2.99 INCH NUCKOLLS NE MESONET

24 HOUR RAINFALL TOTAL ENDING AT 700 AM CDT. REPORTED BY
A NEBRASKA RAINFALL ASSESSMENT AND INFORMATION NETWORK
OBSERVER.

0722 AM HEAVY RAIN HUNTER 39.24N 98.40W
05/20/2011 M2.64 INCH MITCHELL KS CO-OP OBSERVER

RAINFALL PAST 24 HOURS

0722 AM HEAVY RAIN LEBANON 39.81N 98.56W
05/20/2011 M2.75 INCH SMITH KS CO-OP OBSERVER

RAINFALL PAST 24 HOURS

0722 AM HEAVY RAIN HEBRON 40.17N 97.59W
05/20/2011 M3.26 INCH THAYER NE CO-OP OBSERVER

RAINFALL PAST 24 HOURS

0722 AM HEAVY RAIN BRADSHAW 40.88N 97.75W
05/20/2011 M2.52 INCH YORK NE CO-OP OBSERVER

RAINFALL PAST 24 HOURS

0722 AM HEAVY RAIN BRUNING 40.34N 97.56W
05/20/2011 M3.68 INCH THAYER NE CO-OP OBSERVER

RAINFALL PAST 24 HOURS

0722 AM HEAVY RAIN RED CLOUD 40.09N 98.52W
05/20/2011 M2.60 INCH WEBSTER NE CO-OP OBSERVER

RAINFALL PAST 24 HOURS

0722 AM HEAVY RAIN BURR OAK 39.87N 98.30W
05/20/2011 M2.39 INCH JEWELL KS CO-OP OBSERVER

RAINFALL PAST 24 HOURS

0745 AM HEAVY RAIN RED CLOUD 40.09N 98.52W
05/20/2011 M3.00 INCH WEBSTER NE TRAINED SPOTTER

24 HOUR TOTAL RAINFALL OF 3 INCHES MEASURED IN RED CLOUD.

0849 AM HEAVY RAIN MANKATO 39.79N 98.21W
05/20/2011 M2.12 INCH JEWELL KS CO-OP OBSERVER

24 HOUR RAINFALL TOTAL MEASURED AT 2.12 INCHES.

0928 AM HEAVY RAIN OHIOWA 40.41N 97.45W
05/20/2011 M5.00 INCH FILLMORE NE EMERGENCY MNGR

24 HOUR RAINFALL TOTAL OF 5 INCHES OF RAIN MEASURED IN
OHIOWA.

1037 AM HEAVY RAIN 3 SW HENDERSON 40.75N 97.85W
05/20/2011 M2.80 INCH HAMILTON NE TRAINED SPOTTER

24 HOUR TOTAL RAINFALL ENDING AT 10 AM.

&&

$$

DOXEY

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KALY [201954]: Preliminary Local Storm Report

NWUS51 KALY 201954
LSRALY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
353 PM EDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0345 PM FLASH FLOOD STUYVESANT 42.39N 73.78W
05/20/2011 COLUMBIA NY 911 CALL CENTER

ONE LANE CLOSED ON RT 9J DUE TO FLOODING AND DEBRIS

&&

$$

FRUGIS

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KTSA [201948]: Preliminary Local Storm Report...corrected

NWUS54 KTSA 201948
LSRTSA

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE TULSA OK
248 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0820 AM TSTM WND DMG SE FAYETTEVILLE 36.06N 94.16W
05/20/2011 WASHINGTON AR BROADCAST MEDIA

TRAMPOLINE LOFTED 120 YARDS AND OTHER SMALL DEBRIS
CARRIED FROM SE TO NW. ESTIMATED 60 TO 70 MPH WINDS.
POSSIBLE TORNADO.

&&

$$

KAH

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KFWD [201947]: Preliminary Local Storm Report

NWUS54 KFWD 201947
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
247 PM CDT FRI MAY 20 2011

..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0220 PM HAIL STAR 31.47N 98.32W
05/20/2011 E0.75 INCH MILLS TX TRAINED SPOTTER

$$

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KICT [201945]: Preliminary Local Storm Report

NWUS53 KICT 201945
LSRICT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WICHITA KS
245 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0241 PM FLASH FLOOD 7 WNW LINCOLN 39.08N 98.27W
05/20/2011 LINCOLN KS LAW ENFORCEMENT

WATER ON SPILLMAN CREEK CONTINUES TO RISE, AND IS
OVERFLOWING ITS BANK WITH WATER SPREAD OUT ABOUT
ONE-QUARTER MILE AWAY.

&&

$$

KED

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KFWD [201944]: Preliminary Local Storm Report

NWUS54 KFWD 201944
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
244 PM CDT FRI MAY 20 2011

..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0231 PM HAIL WEATHERFORD 32.77N 97.80W
05/20/2011 E0.88 INCH PARKER TX BROADCAST MEDIA

NICKEL SIZE HAIL IN WEATHERFORD

$$

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KALY [201942]: Preliminary Local Storm Report

NWUS51 KALY 201942
LSRALY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
342 PM EDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0320 PM HAIL BELCHER 43.28N 73.39W
05/20/2011 E0.75 INCH WASHINGTON NY PUBLIC

DIME SIZED HAIL COVERED THE GROUND

&&

$$

FRUGIS

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KFWD [201941]: Preliminary Local Storm Report

NWUS54 KFWD 201941
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
241 PM CDT FRI MAY 20 2011

..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0225 PM HAIL 2 SW PLANO 33.00N 96.74W
05/20/2011 E1.25 INCH COLLIN TX PUBLIC

QUARTER TO HALF DOLLAR SIZE HAIL NEAR FRANKFORD AND
MIDWAY

$$

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KTSA [201937]: Preliminary Local Storm Report

NWUS54 KTSA 201937
LSRTSA

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
237 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0820 AM TSTM WND DMG SE FAYETTEVILLE 36.06N 94.16W
05/20/2011 WASHINGTON AR BROADCAST MEDIA

TRAMPOLINE LOFTED 120 YARDS AND OTHER SMALL DEBRIS
CARRIED FROM SE TO NW. POSSIBLE TORNADO.

&&

$$

KAH

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WATCHES: Severe Thunderstorm Watch Number 314

WWUS20 KWNS 201936
SEL4
SPC WW 201936
KSZ000-NEZ000-OKZ000-210300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 314
NWS STORM PREDICTION CENTER NORMAN OK
235 PM CDT FRI MAY 20 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

CENTRAL KANSAS
CENTRAL AND EASTERN NEBRASKA
NORTHWEST OKLAHOMA

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 235 PM UNTIL
1000 PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH
NORTHEAST OF GRAND ISLAND NEBRASKA TO 40 MILES SOUTH OF ALVA
OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 312...WW 313...

DISCUSSION...TSTMS ARE CURRENTLY DEVELOPING ALONG A COLD FRONT WHICH
STRETCHES FROM CNTRL NEB SWD INTO WRN OK. FORCING FOR ASCENT
ATTENDANT TO VORTICITY MAXIMUM PIVOTING NNEWD ACROSS THE REGION
SHOULD SUPPORT AN INCREASE IN STORM COVERAGE AND INTENSITY THROUGH
THE REMAINDER OF THE AFTERNOON. AMBIENT WARM SECTOR AIR MASS IS
CHARACTERIZED BY A GRADUALLY WARMING BOUNDARY LAYER WITH DEWPOINTS
IN THE UPPER 50S TO LOWER 60S...RESULTING IN MLCAPE VALUES OF
500-1000 J/KG. GIVEN THE SUPERPOSITION OF MID AND UPPER-LEVEL JET
AXES ALONG INSTABILITY AXIS...SETUP WILL FAVOR THE DEVELOPMENT OF
ORGANIZED STORMS...INCLUDING SUPERCELLS AND LINE SEGMENTS CAPABLE OF
HAIL AND LOCALLY DAMAGING WIND GUSTS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM
MOTION VECTOR 21025.

...MEAD

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KEWX [201936]: Preliminary Local Storm Report

NWUS54 KEWX 201936
LSREWX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
236 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0229 PM HAIL 10 N LLANO 30.90N 98.67W
05/20/2011 E0.88 INCH LLANO TX TRAINED SPOTTER

PEA TO NICKEL SIZE HAIL SOUTHWEST OF BABY HEAD.

&&

EVENT NUMBER EWX1100198

$$

PM

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KFWD [201935]: Preliminary Local Storm Report

NWUS54 KFWD 201935
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
234 PM CDT FRI MAY 20 2011

..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0230 PM HAIL ADDISON 32.95N 96.82W
05/20/2011 E1.00 INCH DALLAS TX PUBLIC

QUARTER SIZE HAIL IN ADDISON JUST OFF OF THE TOLLWAY

$$

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KFWD [201931]: Preliminary Local Storm Report

NWUS54 KFWD 201931
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
231 PM CDT FRI MAY 20 2011

..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0225 PM HAIL 1 SW PLANO 33.01N 96.73W
05/20/2011 E0.88 INCH COLLIN TX TRAINED SPOTTER

DALLAS NORTH TOLLWAY AND GEORGE BUSH TURNPIKE

$$

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KGGW [201927]: Preliminary Local Storm Report

NWUS55 KGGW 201927
LSRGGW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
127 PM MDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0100 PM HEAVY RAIN 5 N GLENDIVE 47.18N 104.71W
05/20/2011 M0.65 INCH DAWSON MT TRAINED SPOTTER

RAINFALL IN AN HOUR AND A HALF ENDING AT 100 PM.

&&

$$

TEDJ

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KFWD [201922]: Preliminary Local Storm Report

NWUS54 KFWD 201922
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
222 PM CDT FRI MAY 20 2011

..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0217 PM HAIL GAINESVILLE 33.63N 97.15W
05/20/2011 E0.75 INCH COOKE TX TRAINED SPOTTER

$$

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KFWD [201921]: Preliminary Local Storm Report

NWUS54 KFWD 201921
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
221 PM CDT FRI MAY 20 2011

..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0218 PM TSTM WND GST GAINESVILLE 33.63N 97.15W
05/20/2011 E60 MPH COOKE TX EMERGENCY MNGR

REPORTED IN GAINESVILLE

$$

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KSGF [201859]: Preliminary Local Storm Report

NWUS53 KSGF 201859
LSRSGF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
159 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0150 PM TSTM WND GST BRANSON 36.64N 93.22W
05/20/2011 M54 MPH TANEY MO AMATEUR RADIO

MEASURED AT LAKE TANEYCOMO IN BRANSON.

&&

$$

JCOLUCCI

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MESO: Mesoscale Discussion 0828

ACUS11 KWNS 201853
SWOMCD
SPC MCD 201852
KSZ000-NEZ000-OKZ000-202045-

MESOSCALE DISCUSSION 0828
NWS STORM PREDICTION CENTER NORMAN OK
0152 PM CDT FRI MAY 20 2011

AREAS AFFECTED...CNTRL KS...S-CNTRL NEB...NWRN OK

CONCERNING...SEVERE POTENTIAL...SEVERE THUNDERSTORM WATCH LIKELY

VALID 201852Z - 202045Z

CONTINUED DESTABILIZATION ALONG COLD FRONT WILL HELP FOSTER TSTM
DEVELOPMENT THIS AFTERNOON WITH PRIMARY INITIAL RISK OF SEVERE HAIL.
THE PROBABILITY OF A SEVERE TSTM WATCH BEING ISSUED BY 21Z IS 60
PERCENT.

18Z SUBJECTIVE SURFACE ANALYSIS PLACED A PAIR OF 1003 MB CYCLONES
NEAR RSL AND 30 NNW GAG ALONG A N/S-ORIENTED COLD FRONT FROM THE
CNTRL INTO THE SRN PLAINS. SURFACE HEATING HAS BECOME MORE ROBUST
DURING THE PAST COUPLE OF HOURS AS AN EXPANSIVE CIRRUS CANOPY
ASSOCIATED WITH A LARGE-SCALE MCS OVER THE ERN GREAT PLAINS HAS
GRADUALLY SHIFTED EWD. A NARROW AXIS OF A MARGINALLY UNSTABLE AIR
MASS WITH MLCAPE AROUND 500 J/KG HAS DEVELOPED IMMEDIATELY AHEAD OF
THE COLD FRONT WHERE SURFACE TEMPERATURES HAVE WARMED INTO THE
MIDDLE 70S.

SHOWERS/TSTMS HAVE RECENTLY COMMENCED ALONG THE FRONT FROM CNTRL KS
INTO W-CNTRL OK...AN HOUR OR TWO EARLIER THAN LATEST
CONVECTION-ALLOWING HRRR AND WRF-NMM/NSSL GUIDANCE. CONTINUED
DESTABILIZATION WILL SUPPORT INCREASINGLY BUOYANT UPDRAFTS THROUGH
THE AFTERNOON AMIDST STRONG DEEP-LAYER SPEED SHEAR.
HOWEVER...VEER-BACK-VEER WIND PROFILES INDICATED IN AREA
PROFILERS...ALONG WITH WEAK LOW-LEVEL FLOW AND DEEP-LAYER SHEAR
VECTORS ORIENTED NEARLY PARALLEL TO THE INITIATING BOUNDARY SHOULD
RESULT IN A MORE CLUSTER TYPE CONVECTIVE MODE AND SERVE TO TEMPER A
MORE WIDESPREAD LARGE HAIL THREAT.

..GRAMS.. 05/20/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...TOP...ICT...OUN...GID...DDC...

LAT...LON 37209980 38849927 40699918 41049909 41219865 41059823
40469798 38799791 36319878 36059918 36109971 36609990
37209980

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KFWD [201835]: Preliminary Local Storm Report

NWUS54 KFWD 201835
LSRFWD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
134 PM CDT FRI MAY 20 2011

..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0125 PM HAIL GOLDTHWAITE 31.45N 98.57W
05/20/2011 E1.75 INCH MILLS TX LAW ENFORCEMENT

GOLFBALLS REPORTED IN GOLDTHWAITE

$$

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MESO: Mesoscale Discussion 0827

ACUS11 KWNS 201828
SWOMCD
SPC MCD 201828
ARZ000-LAZ000-TXZ000-OKZ000-201930-

MESOSCALE DISCUSSION 0827
NWS STORM PREDICTION CENTER NORMAN OK
0128 PM CDT FRI MAY 20 2011

AREAS AFFECTED...ERN OK...WRN AND CENTRAL AR...NERN TX...AND NWRN LA

CONCERNING...TORNADO WATCH 312...

VALID 201828Z - 201930Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 312 CONTINUES.

AT 18Z...SURFACE ANALYSIS SHOWED A COMPOSITE OUTFLOW BOUNDARY
ATTENDANT TO A COLD POOL CONTINUING TO SHIFT EWD INTO SWRN MO...NWRN
AR AND SERN OK. ADDITIONAL TSTM DEVELOPMENT IS EXPECTED ALONG THIS
BOUNDARY AS IT ENCOUNTERS A MOIST/MODERATELY UNSTABLE WARM SECTOR
EXTENDING NWD ACROSS NERN TX/NWRN LA INTO WRN AR. THIS WARM SECTOR
COEXISTS WITH STRONGER EFFECTIVE BULK SHEAR FOR ORGANIZED STORMS AND
ALONG A 35-40 KT SSWLY LLJ ENHANCING EFFECTIVE SRH /200-400 M2 PER
S2/ FOR LOW LEVEL STORM ROTATION/ATTENDANT TORNADO THREAT. COUNTIES
LOCATED IN THE WAKE OF THE COLD POOL/CONVECTIVE OUTFLOW ACROSS THE
FAR NWRN PART OF WW 312 HAVE A DIMINISHED SEVERE WEATHER THREAT AND
CAN BE REMOVED FROM THIS WATCH BY THE LOCAL WFOS.

MEANWHILE...THE TSTMS EXTENDING FROM CENTRAL AR INTO SRN MO ARE
TRACKING TO THE NORTHEAST AWAY FROM STRONGER DEEP LAYER SLY WIND
FIELDS...WHICH SUBSEQUENTLY INDICATES THIS ACTIVITY WILL CONTINUE TO
ENCOUNTER WEAKER LOW LEVEL AND DEEP LAYER SHEAR WITH EWD EXTENT.
THUS...EITHER EWD EXTENSION OF WW 312 OR THE NEED FOR A NEW WATCH
ARE UNLIKELY AT THIS TIME.

..PETERS.. 05/20/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...MEG...LZK...SHV...TSA...FWD...OUN...

LAT...LON 33019582 33119547 33729541 33809594 34159603 35319555
36209488 36399353 36409193 36149120 35109114 33929163
33929227 32709271 32199343 32129498 32099559 33019582

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KLZK [201819]: Preliminary Local Storm Report

NWUS54 KLZK 201819
LSRLZK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
119 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1250 PM HAIL PINE BLUFF ARSENAL 34.33N 92.10W
05/20/2011 E0.88 INCH JEFFERSON AR PUBLIC

&&

$$

28

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KJAX [201816]: Preliminary Local Storm Report

NWUS52 KJAX 201816
LSRJAX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
216 PM EDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0800 AM WILDFIRE 7 SSW STEVEN FOSTER STA 30.72N 82.37W
05/20/2011 WARE GA PARK/FOREST SRVC

THE HONEY PRAIRIE WILDFIRE HAS BURNED 146,924 ACRES AND
IS 66 PERCENT CONTAINED. STEPHEN FOSTER STATE PARK
REMAINS CLOSED. SWAMP ISLAND DRIVE AT THE OKEFENOKEE
NATIONAL WILDLIFE REFUGE EAST ENTRANCE IS CLOSED.

&&

$$

CARROLL

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KGGW [201810]: Preliminary Local Storm Report

NWUS55 KGGW 201810
LSRGGW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
1210 PM MDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1015 AM HEAVY RAIN 2 WSW GLENDIVE 47.10N 104.75W
05/20/2011 M0.60 INCH DAWSON MT TRAINED SPOTTER

RAINFALL TOTAL AS OF 1015AM. RAIN IS STILL FALLING.

1112 AM HEAVY RAIN 10 WNW CARLYLE 46.69N 104.27W
05/20/2011 U1.00 INCH WIBAUX MT TRAINED SPOTTER

RAIN POURED ALL NIGHT AND IS STILL FALLING. AT LEAST 1
INCH HAS FALLEN BUT NOT SURE THE EXACT AMOUNT BECAUSE THE
RAIN GAUGE WAS OVERFLOWING.

1122 AM HEAVY RAIN 13 S SPROLE 47.92N 105.06W
05/20/2011 M0.25 INCH RICHLAND MT TRAINED SPOTTER

RAINFALL TOTAL FROM OVERNIGHT TO EARLY MORNING. RAIN
STARTED TO FALL AGAIN AROUND 9AM AND IS NOT INCLUDED IN
RAINFALL TOTAL. WATER IS PUDDLING ON THE YARD.

&&

$$

ASCHNETZ

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KLZK [201750]: Preliminary Local Storm Report

NWUS54 KLZK 201750
LSRLZK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1250 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1241 PM HAIL 3 NW FERNDALE 34.81N 92.59W
05/20/2011 E0.25 INCH PULASKI AR AMATEUR RADIO

&&

$$

224

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WATCHES: Severe Thunderstorm Watch Number 313

WWUS20 KWNS 201731
SEL3
SPC WW 201731
TXZ000-210100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 313
NWS STORM PREDICTION CENTER NORMAN OK
1230 PM CDT FRI MAY 20 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTHERN AND CENTRAL TEXAS

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL
800 PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES EAST AND WEST OF A LINE FROM 10 MILES EAST
NORTHEAST OF SHERMAN TEXAS TO 15 MILES SOUTH OF SAN ANTONIO
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 312...

DISCUSSION...TSTMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSITY THIS AFTERNOON ALONG COMPOSITE OUTFLOW/PACIFIC FRONT AS
REGION IS GLANCED BY VORTICITY MAXIMUM PIVOTING NNEWD FROM THE SRN
HIGH PLAINS. AMBIENT WARM SECTOR AIR MASS IS CHARACTERIZED BY A
VERY MOIST BOUNDARY LAYER BENEATH A STEEP MIDLEVEL LAPSE RATE
PLUME...YIELDING MLCAPE VALUES OF 2000-3500+ J/KG. REGION WILL
REMAIN ON SERN PERIPHERY OF STRONGER MID AND HIGH-LEVEL WIND FIELD
ATTENDANT TO ABOVE-MENTIONED VORTICITY MAXIMUM WITH SUFFICIENT
DEEP-LAYER SHEAR FOR ORGANIZED STORMS INCLUDING SUPERCELLS. WHILE A
BRIEF TORNADO IS POSSIBLE...LARGE HAIL AND LOCALLY DAMAGING WIND
GUSTS WILL BE THE PRIMARY HAZARDS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 25025.

...MEAD

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KDDC [201725]: Preliminary Local Storm Report...summary

NWUS53 KDDC 201725
LSRDDC

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DODGE CITY KS
1225 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0400 PM HAIL 6 ESE BUTTERMILK 37.07N 99.25W
05/19/2011 E0.88 INCH COMANCHE KS PUBLIC

0402 PM HAIL 8 E BUTTERMILK 37.13N 99.19W
05/19/2011 E0.75 INCH COMANCHE KS TRAINED SPOTTER

0403 PM HAIL BUTTERMILK 37.11N 99.34W
05/19/2011 E1.75 INCH COMANCHE KS LAW ENFORCEMENT

NUMEROUS REPORTS OF HAIL RECIEVED FROM AROUND THE
BUTTERMILK AREA, VARYING FROM DIME TO GOLFBALL SIZE. THE
REPORTS WERE RECEIVED FROM 403 PM TO 420 PM CDT.

0415 PM HAIL 3 SSW HAVILAND 37.58N 99.13W
05/19/2011 E0.75 INCH KIOWA KS TRAINED SPOTTER

CORRESPONDENT ADVISED THAT HAIL PEA TO PENNY SIZE FELL
FROM 415 PM TO 420 PM.

0422 PM HAIL 4 ENE WILMORE 37.36N 99.15W
05/19/2011 E0.75 INCH COMANCHE KS TRAINED SPOTTER

0430 PM TSTM WND GST 3 NE COLDWATER 37.29N 99.30W
05/19/2011 E60.00 MPH COMANCHE KS TRAINED SPOTTER

0440 PM TSTM WND DMG IUKA 37.73N 98.73W
05/19/2011 PRATT KS TRAINED SPOTTER

A CENTER PIVOT SPRINKLER SYSTEM WAS BLOWN OVER. ESTIMATED
WIND SPEED 80 MPH.

0444 PM TSTM WND GST 3 SW BYERS 37.75N 98.90W
05/19/2011 E60.00 MPH PRATT KS EMERGENCY MNGR

AN IRRIGATION SYSTEM WAS ALSO BLOWN OVER.

0449 PM TSTM WND DMG 4 SSW BYERS 37.73N 98.90W
05/19/2011 PRATT KS EMERGENCY MNGR

IRRIGATION SYSTEM BLOWN DOWN. THUNDERSTORM WIND GUSTS
WERE ESTIMATED OVER 60 MPH.

0450 PM HAIL MACKSVILLE 37.96N 98.97W
05/19/2011 E0.88 INCH STAFFORD KS TRAINED SPOTTER

0502 PM TSTM WND DMG 1 ENE GREENSBURG 37.61N 99.27W
05/19/2011 KIOWA KS STORM CHASER

A SEMI WAS BLOWN OVER BY A STRONG THUNDERSTORM WIND GUST.
REPORT WAS RECEIVED THROUGH SPOTTERNETWORK

0620 PM TSTM WND GST 1 SSW SPEARVILLE 37.84N 99.76W
05/19/2011 E60.00 MPH FORD KS PUBLIC

0620 PM HAIL 1 SSW SPEARVILLE 37.84N 99.76W
05/19/2011 E1.00 INCH FORD KS PUBLIC

0620 PM HAIL SPEARVILLE 37.85N 99.75W
05/19/2011 E0.88 INCH FORD KS PUBLIC

0621 PM HAIL 2 S SPEARVILLE 37.82N 99.75W
05/19/2011 E0.75 INCH FORD KS PUBLIC

0715 PM HAIL 4 WSW DODGE CITY 37.73N 100.07W
05/19/2011 E0.88 INCH FORD KS TRAINED SPOTTER

0717 PM TSTM WND GST 2 N DODGE CITY 37.79N 100.01W
05/19/2011 E60.00 MPH FORD KS TRAINED SPOTTER

SMALL TREE BRANCH BLOWN DOWN.

0755 PM HAIL 7 E JETMORE 38.08N 99.76W
05/19/2011 E1.00 INCH HODGEMAN KS PUBLIC

0815 PM HAIL 5 WSW GRAY 38.11N 99.71W
05/19/2011 E0.88 INCH HODGEMAN KS PUBLIC

0815 PM TSTM WND GST 5 WSW GRAY 38.11N 99.71W
05/19/2011 E60.00 MPH HODGEMAN KS PUBLIC

0845 PM HAIL 3 WNW FORD 37.65N 99.80W
05/19/2011 E1.00 INCH FORD KS PUBLIC

THE HAIL SIZE WAS ANYWHERE FROM PEA TO QUARTER.

0850 PM HAIL DODGE CITY 37.76N 100.01W
05/19/2011 E1.00 INCH FORD KS NWS EMPLOYEE

NUMEROUS REPORTS OF QUARTER SIZE HAIL ACROSS DODGE CITY
FROM 850 TO 855 PM.

0855 PM HAIL DODGE CITY 37.76N 100.01W
05/19/2011 E1.75 INCH FORD KS NWS EMPLOYEE

0930 PM TSTM WND GST 3 SW DODGE CITY 37.73N 100.05W
05/19/2011 E60.00 MPH FORD KS NWS EMPLOYEE

0950 PM HAIL DODGE CITY 37.76N 100.01W
05/19/2011 E0.88 INCH FORD KS NWS EMPLOYEE

1005 PM HAIL 5 N WRIGHT 37.85N 99.90W
05/19/2011 E1.00 INCH FORD KS STORM CHASER

1100 PM FLOOD S RUSH CENTER 38.46N 99.31W
05/19/2011 RUSH KS LAW ENFORCEMENT

WATER WAS COVERING 50 FEET OF THE ROAD ON HIGHWAY 183
SOUTH OF RUSH CENTER.

0700 AM HEAVY RAIN 5 N ASH VALLEY 38.36N 99.22W
05/20/2011 E2.40 INCH RUSH KS PUBLIC

THIS IS A 24 HOUR RAINFALL AMOUNT WITH MOST OF IT FALLING
ON THE EVENING OF THE 19TH.

0700 AM HEAVY RAIN 1 SW OTIS 38.52N 99.07W
05/20/2011 M1.50 INCH RUSH KS PUBLIC

THIS IS A 24 HOUR RAINFALL AMOUNT WITH MOST OF IT FALLING
DURING THE EVENING OF THE 19TH.

0700 AM HEAVY RAIN 5 SSE LA CROSSE 38.46N 99.29W
05/20/2011 M2.60 INCH RUSH KS TRAINED SPOTTER

THIS IS A 24 HOUR RAINFALL AMOUNT WITH MOST OF IT FALLING
DURING THE EVENING OF THE 19TH.

0700 AM HEAVY RAIN LA CROSSE 38.53N 99.31W
05/20/2011 M4.11 INCH RUSH KS TRAINED SPOTTER

THIS IS A 24 HOUR RAINFALL AMOUNT WITH MOST OF IT FALLING
ON THE EVENING OF THE 19TH.

&&

$$

LEE

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KDDC [201724]: Preliminary Local Storm Report

NWUS53 KDDC 201724
LSRDDC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DODGE CITY KS
1223 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0620 PM HAIL 1 SSW SPEARVILLE 37.84N 99.76W
05/19/2011 E1.00 INCH FORD KS PUBLIC

0620 PM TSTM WND GST 1 SSW SPEARVILLE 37.84N 99.76W
05/19/2011 E60.00 MPH FORD KS PUBLIC

0815 PM HAIL 5 WSW GRAY 38.11N 99.71W
05/19/2011 E0.88 INCH HODGEMAN KS PUBLIC

0815 PM TSTM WND GST 5 WSW GRAY 38.11N 99.71W
05/19/2011 E60.00 MPH HODGEMAN KS PUBLIC

0845 PM HAIL 3 WNW FORD 37.65N 99.80W
05/19/2011 E1.00 INCH FORD KS PUBLIC

THE HAIL SIZE WAS ANYWHERE FROM PEA TO QUARTER.

0700 AM HEAVY RAIN LA CROSSE 38.53N 99.31W
05/20/2011 M4.11 INCH RUSH KS TRAINED SPOTTER

THIS IS A 24 HOUR RAINFALL AMOUNT WITH MOST OF IT FALLING
ON THE EVENING OF THE 19TH.

0700 AM HEAVY RAIN 5 N ASH VALLEY 38.36N 99.22W
05/20/2011 E2.40 INCH RUSH KS PUBLIC

THIS IS A 24 HOUR RAINFALL AMOUNT WITH MOST OF IT FALLING
ON THE EVENING OF THE 19TH.

0700 AM HEAVY RAIN 1 SW OTIS 38.52N 99.07W
05/20/2011 M1.50 INCH RUSH KS PUBLIC

THIS IS A 24 HOUR RAINFALL AMOUNT WITH MOST OF IT FALLING
DURING THE EVENING OF THE 19TH.

0700 AM HEAVY RAIN 5 SSE LA CROSSE 38.46N 99.29W
05/20/2011 M2.60 INCH RUSH KS TRAINED SPOTTER

THIS IS A 24 HOUR RAINFALL AMOUNT WITH MOST OF IT FALLING
DURING THE EVENING OF THE 19TH.

&&

$$

LEE

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 201723
SWODY2
SPC AC 201722

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1222 PM CDT FRI MAY 20 2011

VALID 211200Z - 221200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE PLAINS AND MIDWEST
ACROSS THE MID/LWR MS VLY...

...SYNOPSIS...
LARGE SCALE FLOW OVER THE U.S. WILL BECOME LESS AMPLIFIED THIS
PERIOD AS A STRONG UPPER TROUGH ACROSS THE PLAINS EJECTS NEWD TOWARD
THE UPR MS VALLEY AND WRN GREAT LAKES REGION AND OCCLUDED CYCLONE
MIGRATES SLOWLY NWD TO THE DAKOTAS. STUBBORN CLOSED LOW ACROSS THE
NORTHEAST WILL BE SHUNTED OFFSHORE AS HEIGHTS RISE FROM THE ERN
GREAT LAKES TO THE APPALACHIANS AND MID ATLANTIC. MEANWHILE...A
BROAD TROUGH IS FORECAST TO DEVELOP INLAND ACROSS THE WEST COAST
WITH WEAK HEIGHT FALLS SPREADING FROM THE PAC NW TO THE LWR COLORADO
RIVER VALLEY THROUGH THE END OF THE PERIOD.

GREATEST SEVERE WEATHER POTENTIAL ON SATURDAY WILL BE LINKED TO THE
SHORT WAVE TROUGH EJECTING NEWD ACROSS THE MO AND MS RIVER VLYS...AS
WELL AS COLDER AIR ALOFT IN THE BASE OF THE LARGER SCALE CLOSED LOW
SPREADING ACROSS A RECOVERING AIRMASS OVER THE PLAINS.

...LWR/MID MS VLY TO MIDWEST...
DESPITE WIDESPREAD ONGOING CONVECTION AND COMPLEX FORECAST EVOLUTION
ACROSS THE PLAINS AT THE CURRENT TIME...00Z STORM SCALE GUIDANCE AT
36H FORECAST IS REMARKABLY SIMILAR IN DEPICTING A DECAYING MCS/QLCS
ACROSS AR/WRN TN/NRN MS EARLY SATURDAY. DYNAMIC FORCING FOR ASCENT
WITH THE PROGRESSIVE SHORT WAVE TROUGH...AND RESULTING LOW LEVEL
MASS INFLOW...WILL LIKELY SUSTAIN CONVECTIVE POTENTIAL EAST AND
NORTHEAST ACROSS THE MS RIVER VLY AND INTO THE MIDWEST THROUGH THE
DAY. WHILE GENERALLY WEAK LAPSE RATES AND MARGINAL LOW LEVEL
MOISTURE/HEATING ARE EXPECTED TO LIMIT DOWNSTREAM AIRMASS
DESTABILIZATION ACROSS THE LWR OH VALLEY...SOME INCREASE IN SEVERE
STORM POTENTIAL MAY BE EXPECTED AS THE STRONGER FORCING AND
DEEP-LAYER WIND FIELDS SPREAD ENEWD FROM IL AND IND ACROSS WRN KY
AND TN THROUGH THE AFTERNOON. FAST MOVING LINE SEGMENTS SHOULD
RESULT IN A CHANCE FOR SCATTERED DAMAGING WINDS.

GREATER AIRMASS DESTABILIZATION WILL LIKELY OCCUR ALONG THE ERN AND
SRN FLANK OF MORNING MCS ACTIVITY....FROM SRN AR AND NRN MS SWWD
ACROSS NRN LA AND ERN TX. OUTFLOW BOUNDARIES FROM EARLIER CONVECTION
WILL SERVE AS A FOCUS FOR AFTERNOON TSTM DEVELOPMENT WHERE MODEST
MID LEVEL WLY FLOW IN THE WAKE OF THE DEPARTING SHORT WAVE TROUGH
WILL PROVIDE DEEP-LAYER SHEAR SUPPORTIVE OF ORGANIZED STORMS.
HOWEVER...WEAK LARGE SCALE HEIGHT RISES MAY ACT TO LIMIT MORE
WIDESPREAD TSTM DEVELOPMENT...ESPECIALLY ACROSS LA/TX WHERE ONLY LOW
SEVERE WEATHER PROBABILITIES WILL BE MAINTAINED WITH THIS OUTLOOK.

...SRN PLAINS/MID MO RIVER VLY LATE DAY...
LATEST GUIDANCE SUPPORTS A TRAILING SHORT WAVE TROUGH ROTATING
THROUGH THE BASE OF THE LARGER SCALE UPPER TROUGH COINCIDENT WITH
DIURNAL DESTABILIZATION AND DRYLINE MIXING FROM NRN OK ACROSS ERN KS
SATURDAY AFTERNOON. LIFT AND STEEP MID LEVEL LAPSE RATES
ACCOMPANYING THIS FEATURE ARE EXPECTED TO AID AT LEAST ISOLATED TSTM
DEVELOPMENT THAT MAY EVEN EXTEND NWD WITHIN/BENEATH THE MID/UPPER
LEVEL COLD POOL ACROSS NEB/WRN IA. CYCLONIC MID LEVEL FLOW OF 25-35
KTS ATOP GENERALLY WEAKER LOW LEVEL FLOW WILL RESULT IN SHEAR
SUPPORTIVE OF ORGANIZED STORMS...SOME OF WHICH COULD PRODUCE LARGE
HAIL AND DAMAGING WIND GUSTS. ONE OR TWO CONVECTIVE CLUSTERS MAY
EVOLVE FROM THIS INITIAL ACTIVITY AND SPREAD EAST INTO IA/MO AND AR
INTO THE EVENING.

..CARBIN.. 05/20/2011

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MESO: Mesoscale Discussion 0826

ACUS11 KWNS 201708
SWOMCD
SPC MCD 201708
TXZ000-OKZ000-201815-

MESOSCALE DISCUSSION 0826
NWS STORM PREDICTION CENTER NORMAN OK
1208 PM CDT FRI MAY 20 2011

AREAS AFFECTED...NRN AND CENTRAL TX

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY

VALID 201708Z - 201815Z

WW WILL LIKELY BE REQUIRED WITHIN THE NEXT 1-2 HOURS /BY 18-19Z/.
PROBABILITY OF WATCH ISSUANCE IS 80 PERCENT.

AT 17Z...REGIONAL RADAR IMAGERY AND LIGHTNING DATA SHOWED A STRONG
STORM ALONG THE SRN EXTENT OF A CONVECTIVE OUTFLOW BOUNDARY
ATTENDANT TO THE SRN PLAINS MCS...WITH THIS STORM LOCATED IN NRN SAN
SABA/WRN MILLS COUNTIES. VISIBLE SATELLITE IMAGERY SHOWED BREAKS IN
THE CLOUDS ALONG AND EAST OF THE ABOVE MENTIONED BOUNDARY...
SUPPORTING SURFACE HEATING WITHIN RICH BOUNDARY LAYER MOISTURE
/SURFACE DEWPOINTS IN THE LOWER 70S/. STEEP MIDLEVEL LAPSE RATES
/7.5-8.5 C PER KM/ AND ADDITIONAL HEATING WILL MAINTAIN STRONG
INSTABILITY /MLCAPE 2000-3000 J PER KG/ THROUGH THE AFTERNOON.
ALTHOUGH LOW LEVEL WINDS TEND TO WEAKEN WITH SWD EXTENT ACROSS
TX...THE ERN EXTENT OF STRONGER MID AND HIGH LEVEL SLY FLOW WILL
RESULT IN EFFECTIVE BULK SHEAR SUPPORTIVE OF ORGANIZED STORMS...
INCLUDING SUPERCELLS. LARGE HAIL AND DAMAGING WINDS WILL BE THE
PRIMARY THREATS WITH ADDITIONAL STORMS EXPECTED TO DEVELOP ALONG THE
COMPOSITE OUTFLOW BOUNDARY EXTENDING FROM SOUTH CENTRAL TO NORTH
CENTRAL TX.

..PETERS.. 05/20/2011

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...SHV...HGX...FWD...OUN...EWX...SJT...

LAT...LON 30299951 31359957 33259790 33779690 33729545 31939563
30839596 29969678 29459782 29619918 30299951

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KLZK [201705]: Preliminary Local Storm Report

NWUS54 KLZK 201705
LSRLZK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1205 PM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1145 AM HAIL 5 NW HOT SPRINGS 34.54N 93.11W
05/20/2011 E1.00 INCH GARLAND AR TRAINED SPOTTER

&&

$$

224

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KOUN [201646]: Preliminary Local Storm Report

NWUS54 KOUN 201646
LSROUN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1145 AM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0720 PM TSTM WND DMG 3 S OKLAUNION 34.09N 99.13W
05/19/2011 WILBARGER TX STORM CHASER

DELAYED REPORT OF STRUCTURAL DAMAGE TO A HOME AND TREE
AND POWER LINE DAMAGE ALONG HIGHWAY 183 NEAR OKLAUNION.

&&

$$

MA

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KRIW [201641]: Preliminary Local Storm Report

NWUS55 KRIW 201641
LSRRIW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1038 AM MDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1133 PM HEAVY SNOW 8 S CASPER 42.73N 106.32W
05/19/2011 E6.00 INCHES NATRONA WY MESONET

CASPER MOUNTAIN SNOTEL

1134 PM SNOW 16 NE DUBOIS 43.67N 109.37W
05/19/2011 E1.00 INCHES FREMONT WY MESONET

CASTLE CREEK SNOTEL

1135 PM SNOW 24 SW BUFFALO 44.16N 107.13W
05/19/2011 E5.00 INCHES WASHAKIE WY MESONET

POWDER RIVER PASS SNOTEL

1136 PM HEAVY SNOW 21 SW BARNUM 43.47N 107.24W
05/19/2011 E11.00 INCHES NATRONA WY MESONET

GRAVE SPRING SNOTEL

0941 AM HEAVY SNOW 14 W CROWHEART 43.28N 109.45W
05/20/2011 E33.00 INCHES FREMONT WY MESONET

COLD SPRINGS SNOTEL

0941 AM HEAVY SNOW 18 W LANDER 42.87N 109.09W
05/20/2011 E47.00 INCHES FREMONT WY MESONET

HOBBS PARK SNOTEL

0942 AM HEAVY SNOW 19 SSW LANDER 42.59N 108.90W
05/20/2011 E34.00 INCHES FREMONT WY MESONET

DEER PARK SNOTEL

0942 AM HEAVY SNOW 7 NW ATLANTIC CITY 42.57N 108.84W
05/20/2011 E41.00 INCHES FREMONT WY MESONET

SOUTH PASS SNOTEL

0942 AM HEAVY SNOW 26 NW LANDER 43.03N 109.17W
05/20/2011 E36.00 INCHES FREMONT WY MESONET

ST. LAWRENCE ALT SNOTEL

0942 AM HEAVY SNOW 12 SW LANDER 42.70N 108.90W
05/20/2011 E44.00 INCHES FREMONT WY MESONET

TOWNSEND CREEK SNOTEL

0943 AM SNOW 22 SSE CASPER 42.57N 106.09W
05/20/2011 E4.00 INCHES NATRONA WY MESONET

RENO HILL SNOTEL

0943 AM HEAVY SNOW 21 W CLARK 44.94N 109.57W
05/20/2011 E7.00 INCHES PARK WY MESONET

BEARTOOTH LAKE SNOTEL

0943 AM HEAVY SNOW 19 WSW WAPITI 44.38N 109.79W
05/20/2011 E6.00 INCHES PARK WY MESONET

BLACKWATER SNOTEL

0944 AM SNOW 14 NE PAHASKA 44.65N 109.78W
05/20/2011 E3.00 INCHES PARK WY MESONET

EVENING STAR SNOTEL

0945 AM HEAVY SNOW 30 SW MEETEETSE 43.86N 109.32W
05/20/2011 E16.00 INCHES PARK WY MESONET

KIRWIN SNOTEL

0945 AM HEAVY SNOW 18 SW CODY 44.30N 109.24W
05/20/2011 E25.00 INCHES PARK WY MESONET

MARQUETTE SNOTEL

0945 AM HEAVY SNOW 40 W THERMOPOLIS 43.66N 109.01W
05/20/2011 E8.00 INCHES HOT SPRINGS WY MESONET

OWL CREEK SNOTEL

0945 AM HEAVY SNOW 18 WSW MEETEETSE 44.03N 109.18W
05/20/2011 E9.00 INCHES PARK WY MESONET

TIMBER CREEK SNOTEL

0945 AM HEAVY SNOW 28 E LOVELL 44.80N 107.84W
05/20/2011 E6.00 INCHES BIG HORN WY MESONET

BALD MOUNTAIN SNOTEL

0945 AM SNOW 14 NE SHELL 44.68N 107.58W
05/20/2011 E4.00 INCHES BIG HORN WY MESONET

BONE SPRINGS DIVIDE SNOTEL

0946 AM SNOW 13 W BARNUM 43.63N 107.18W
05/20/2011 E5.00 INCHES WASHAKIE WY MESONET

MIDDLE POWDER SNOTEL

0946 AM SNOW 18 E SHELL 44.50N 107.43W
05/20/2011 E5.00 INCHES BIG HORN WY MESONET

SHELL CREEK SNOTEL

0946 AM HEAVY SNOW 14 WNW MAYOWORTH 43.89N 107.06W
05/20/2011 E11.00 INCHES JOHNSON WY MESONET

BEAR TRAP MEADOW SNOTEL

0946 AM HEAVY SNOW 17 W BUFFALO 44.40N 107.06W
05/20/2011 E13.00 INCHES JOHNSON WY MESONET

CLOUD PEAK RESERVOIR SNOTEL

0947 AM HEAVY SNOW 14 WSW BUFFALO 44.26N 106.98W
05/20/2011 E15.00 INCHES JOHNSON WY MESONET

HANSEN SAWMILL SNOTEL

0947 AM HEAVY SNOW 27 NW BUFFALO 44.54N 107.17W
05/20/2011 E12.00 INCHES JOHNSON WY MESONET

LITTLE GOOSE SNOTEL

0947 AM HEAVY SNOW 16 W BUFFALO 44.34N 107.02W
05/20/2011 E13.00 INCHES JOHNSON WY MESONET

SOLDIER PARK SNOTEL

1005 AM SNOW 6 SW LANDER 42.76N 108.79W
05/20/2011 M5.90 INCHES FREMONT WY COCORAHS

1005 AM SNOW 2 N LANDER 42.85N 108.72W
05/20/2011 M2.00 INCHES FREMONT WY COCORAHS

1006 AM SNOW 1 WSW LANDER 42.82N 108.74W
05/20/2011 M1.20 INCHES FREMONT WY COCORAHS

1006 AM SNOW 4 SSW LANDER 42.77N 108.77W
05/20/2011 M5.70 INCHES FREMONT WY COCORAHS

1006 AM SNOW 17 NNW KAYCEE 43.93N 106.75W
05/20/2011 M2.00 INCHES JOHNSON WY COCORAHS

1007 AM SNOW 2 S CASPER 42.80N 106.33W
05/20/2011 M0.10 INCHES NATRONA WY COCORAHS

1007 AM SNOW 1 N KEMMERER 41.79N 110.54W
05/20/2011 M3.50 INCHES LINCOLN WY COCORAHS

1007 AM SNOW 4 WSW CASPER 42.82N 106.39W
05/20/2011 M0.50 INCHES NATRONA WY COCORAHS

1008 AM SNOW 7 SSE ROCK SPRINGS 41.50N 109.15W
05/20/2011 M0.40 INCHES SWEETWATER WY COCORAHS

1009 AM HEAVY SNOW 4.5 NW RIVERTON 43.05N 108.43W
05/20/2011 M7.50 INCHES FREMONT WY ASOS

RIVERTON ASOS

1009 AM HEAVY SNOW LANDER ASOS 42.80N 108.72W
05/20/2011 M6.00 INCHES FREMONT WY ASOS

1010 AM SNOW CASPER ASOS 42.88N 106.47W
05/20/2011 M0.70 INCHES NATRONA WY ASOS

1011 AM HEAVY SNOW SWEETWATER STATION 42.54N 108.18W
05/20/2011 M6.00 INCHES FREMONT WY PUBLIC

1013 AM SNOW SINKS CANYON 42.75N 108.79W
05/20/2011 M5.50 INCHES FREMONT WY PUBLIC

1013 AM SNOW KEMMERER 41.78N 110.55W
05/20/2011 M5.00 INCHES LINCOLN WY PUBLIC

1022 AM HEAVY SNOW 6 SW LANDER 42.76N 108.79W
05/20/2011 M8.50 INCHES FREMONT WY TRAINED SPOTTER

1022 AM SNOW 2 W RIVERTON 43.02N 108.42W
05/20/2011 M1.50 INCHES FREMONT WY NWS EMPLOYEE

1022 AM SNOW 8 NNW RIVERTON 43.13N 108.49W
05/20/2011 M5.50 INCHES FREMONT WY COCORAHS

1025 AM HEAVY SNOW 31 WSW THERMOPOLIS 43.54N 108.81W
05/20/2011 M8.40 INCHES FREMONT WY PUBLIC

1026 AM HEAVY SNOW 10 S LANDER 42.65N 108.64W
05/20/2011 M6.40 INCHES FREMONT WY PUBLIC

RED CANYON

&&

$$

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 201630
SWODY1
SPC AC 201628

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1128 AM CDT FRI MAY 20 2011

VALID 201630Z - 211200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM ERN OK/AR SWWD INTO CNTRL
TX...

...THERE IS A SLGT RISK OF SVR TSTMS FROM CNTRL/ERN NEB INTO WRN
OK...

...ERN PARTS OF OK/TX INTO AR/NRN LA...

SRN EXTENSION OF NOCTURNAL QLCS IS EXPECTED TO PERSIST
TODAY...GRADUALLY MOVING/DEVELOPING EWD WITH TIME. THE INFLUX OF A
SEASONABLY MOIST AIR MASS /CHARACTERIZED BY BOUNDARY LAYER DEWPOINTS
IN UPPER 60S TO LOWER 70S/ WILL BE MAINTAINED BY A 35-45 KT SLY LLJ
WHICH SHOULD SERVE TO ENHANCE UPDRAFT STRENGTH ALONG LEADING EDGE OF
SYSTEM COLD POOL. ADDITIONAL MORE DISCRETE STORM DEVELOPMENT WILL
REMAIN POSSIBLE IN ADVANCE OF QLCS AND S OF WARM FRONT LIFTING NWD
INTO SRN MO WHERE LOW-LEVEL SHEAR WILL BE ENHANCED BY THE PRESENCE
OF THE LLJ. WHILE MID AND HIGH-LEVEL WIND FIELD WILL NOT BE
PARTICULARLY STRONG...THE PRESENCE OF 0-1 KM SRH OF 200-250 M2/S2
AND THE MOIST BOUNDARY LAYER SUGGEST A RISK FOR A FEW TORNADOES WITH
ANY SUPERCELLS THAT CAN BECOME ESTABLISHED. OTHERWISE...EXPECT
LARGER-SCALE CONVECTIVE SYSTEM TO REMAIN CAPABLE OF DAMAGING WIND
GUSTS AND HAIL TODAY INTO THIS EVENING.

FOR ADDITIONAL NEAR TERM GUIDANCE...SEE MCD 825.

...CNTRL/ERN NEB INTO WRN OK...

LATEST MODEL GUIDANCE SUGGESTS THAT BREAKS IN THE CLOUDS COUPLED
WITH HEIGHT FALLS/DYNAMIC COOLING IN THE MIDLEVELS ASSOCIATED WITH
VORTICITY MAXIMUM PIVOTING NNEWD THROUGH THE HIGH PLAINS MAY SUPPORT
A NARROW AXIS OF MODERATE INSTABILITY BY AFTERNOON IMMEDIATELY AHEAD
OF PACIFIC FRONT. THE STRONGEST DEEP-LAYER VERTICAL SHEAR /40-50
KT/ WILL RESIDE ACROSS OK INTO SRN KS...DECREASING TO 30-35 KT IN
NEB. AS SUCH...ISOLATED TO WIDELY SCATTERED STORMS /INCLUDING
SUPERCELLS/ WILL BE POSSIBLE THIS AFTERNOON INTO EVENING WITH THE
PRIMARY HAZARD BEING LARGE HAIL.

...NRN PLAINS...

AS MIDLEVEL DRY SLOT CONTINUES TO DEVELOP NWD TODAY...SOME POTENTIAL
FOR CLEARING WILL EXIST ALONG IMMEDIATE FRONT ARCING NWWD FROM CNTRL
NEB TO WEAK LOW PRESSURE OVER WRN SD. GIVEN VERTICALLY VEERING
WINDS WITH HEIGHT...BOUNDARY LAYER DEWPOINTS IN THE 50S AND A
RELATIVELY COOL THERMODYNAMIC PROFILE PER 12Z RAP SOUNDING...A RISK
FOR ISOLATED SEVERE STORMS WILL EXIST SHOULD SUFFICIENT
HEATING/DESTABILIZATION OCCUR. DUE TO UNCERTAINTY IN THE DEGREE OF
INSTABILITY THAT WILL DEVELOP LATER TODAY...LOW SEVERE WEATHER
PROBABILITIES WILL BE MAINTAINED.

...ERN CAROLINAS...

VORTICITY MAXIMUM OVER WV/VA LATE THIS MORNING WILL CONTINUE SEWD
TODAY...GLANCING THE REGION WITH WEAK HEIGHT FALLS/FORCING FOR
ASCENT. THIS MIDLEVEL SYSTEM WILL BE ATTENDED BY A WEAK SURFACE
TROUGH/COLD FRONT WHICH MAY SERVE AS THE FOCUS FOR ISOLATED TO
WIDELY SCATTERED TSTM DEVELOPMENT THIS AFTERNOON. DAYTIME HEATING
COUPLED WITH MODEST BOUNDARY LAYER MOISTURE CONTENT MAY YIELD MLCAPE
VALUES APPROACHING 500-1000 J/KG AHEAD OF FRONT. GIVEN MODESTLY
STRONG MID AND HIGH-LEVEL WNWLY FLOW OBSERVED BY 12Z SOUNDINGS...
SOME RISK FOR LOCALLY STRONG WIND GUSTS AND PERHAPS HAIL WILL EXIST
WITH ANY STORMS THAT CAN DEVELOP.

..MEAD/GRAMS.. 05/20/2011

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KICT [201623]: Preliminary Local Storm Report

NWUS53 KICT 201623
LSRICT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WICHITA KS
1123 AM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1100 AM FLASH FLOOD LINCOLN 39.04N 98.15W
05/20/2011 LINCOLN KS EMERGENCY MNGR

SECONDARY ROADS CONTINUE TO BE UNDER WATER ACROSS THE
COUNTY.

&&

$$

JAS

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KGGW [201620]: Preliminary Local Storm Report

NWUS55 KGGW 201620
LSRGGW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
1020 AM MDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0600 AM HEAVY RAIN GLENDIVE 47.11N 104.71W
05/20/2011 M0.16 INCH DAWSON MT CO-OP OBSERVER

RAINFALL TOTAL AS OF 6AM. RAIN IS CURRENTLY FALLING.

0700 AM HEAVY RAIN 16 WSW GLENDIVE 47.02N 105.03W
05/20/2011 M0.48 INCH DAWSON MT COCORAHS

0700 AM HEAVY RAIN 2 W GLENDIVE 47.11N 104.75W
05/20/2011 M0.24 INCH DAWSON MT COCORAHS

0800 AM HEAVY RAIN TERRY 46.79N 105.31W
05/20/2011 M0.74 INCH PRAIRIE MT CO-OP OBSERVER

RAINFALL TOTAL AS OF 8AM. RAIN IS STILL FALLING.

0900 AM HEAVY RAIN 7 NNE GLENDIVE 47.20N 104.65W
05/20/2011 M0.38 INCH DAWSON MT COCORAHS

MEASUREMENT TAKEN FROM COCORAHS OBSERVER AS OF 9AM.

0935 AM FLOOD 23 E TERRY 46.79N 104.83W
05/20/2011 PRAIRIE MT EMERGENCY MNGR

PROLONGED HEAVY RAIN CAUSED THE EMBANKMENT OF A BRIDGE TO
WASH OUT ON CABIN CREEK ROAD.

&&

$$

ASCHNETZ

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KSHV [201614]: Preliminary Local Storm Report

NWUS54 KSHV 201614
LSRSHV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1114 AM CDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0933 AM HAIL PERRYTOWN 33.70N 93.53W
05/20/2011 E1.00 INCH HEMPSTEAD AR EMERGENCY MNGR

RELAYED FROM EMERGENCY MANAGEMENT

&&

$$

04

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KUNR [201609]: Preliminary Local Storm Report...summary

NWUS53 KUNR 201609
LSRUNR

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE RAPID CITY SD
1008 AM MDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0700 AM HEAVY RAIN 3 SW HERMOSA 43.81N 103.23W
05/20/2011 M2.54 INCH CUSTER SD CO-OP OBSERVER

0700 AM HEAVY RAIN HOOVER 45.11N 103.27W
05/20/2011 M2.15 INCH BUTTE SD CO-OP OBSERVER

0700 AM HEAVY RAIN PACTOLA RESERVOIR 44.07N 103.50W
05/20/2011 M2.47 INCH PENNINGTON SD CO-OP OBSERVER

0700 AM HEAVY RAIN 4 NW DOWNTOWN RAPID CIT 44.12N 103.29W
05/20/2011 M2.62 INCH PENNINGTON SD CO-OP OBSERVER

0700 AM HEAVY RAIN ORAL 43.40N 103.27W
05/20/2011 M1.96 INCH FALL RIVER SD CO-OP OBSERVER

0700 AM HEAVY RAIN EDGEMONT 43.30N 103.83W
05/20/2011 M1.25 INCH FALL RIVER SD CO-OP OBSERVER

0700 AM HEAVY RAIN 1 S OGLALA 43.17N 102.73W
05/20/2011 M1.62 INCH SHANNON SD CO-OP OBSERVER

0700 AM HEAVY RAIN 11 N PORCUPINE 43.39N 102.33W
05/20/2011 M2.28 INCH SHANNON SD CO-OP OBSERVER

0700 AM HEAVY RAIN 2 ESE COTTONWOOD 43.95N 101.86W
05/20/2011 M1.35 INCH JACKSON SD CO-OP OBSERVER

0700 AM HEAVY RAIN 3 ESE ELM SPRINGS 44.30N 102.47W
05/20/2011 M1.93 INCH MEADE SD CO-OP OBSERVER

0700 AM HEAVY RAIN OPAL 44.89N 102.61W
05/20/2011 M1.70 INCH MEADE SD CO-OP OBSERVER

0700 AM HEAVY RAIN 4 NNW WHITEWOOD 44.51N 103.67W
05/20/2011 M2.58 INCH LAWRENCE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN SILVER CITY 44.09N 103.57W
05/20/2011 M2.62 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 7 SW OELRICHS 43.11N 103.33W
05/20/2011 M2.62 INCH FALL RIVER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN SSW DOWNTOWN HOT SPRING 43.43N 103.48W
05/20/2011 M2.71 INCH FALL RIVER SD COCORAHS

0700 AM HEAVY RAIN 8 WNW DOWNTOWN RAPID CI 44.12N 103.38W
05/20/2011 M2.74 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 SW NEWELL 44.69N 103.46W
05/20/2011 M2.74 INCH BUTTE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 WNW DOWNTOWN RAPID CI 44.09N 103.29W
05/20/2011 M2.76 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 2 WNW DOWNTOWN RAPID CI 44.09N 103.27W
05/20/2011 M2.77 INCH PENNINGTON SD CO-OP OBSERVER

2 DAY TOTAL

0700 AM HEAVY RAIN 5 SW DOWNTOWN RAPID CIT 44.02N 103.30W
05/20/2011 M2.80 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 1 NW PIEDMONT 44.24N 103.41W
05/20/2011 M2.91 INCH MEADE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN BLACK HAWK 44.15N 103.32W
05/20/2011 M2.95 INCH MEADE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 SSW DOWNTOWN RAPID CI 44.04N 103.26W
05/20/2011 M3.07 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 13 W MARTIN 43.17N 101.99W
05/20/2011 M2.44 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 7 SW SHADEHILL 45.69N 102.29W
05/20/2011 M0.89 INCH PERKINS SD CO-OP OBSERVER

0700 AM HEAVY RAIN HERMOSA 43.84N 103.19W
05/20/2011 M2.55 INCH CUSTER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 11 SSW OELRICHS 43.03N 103.31W
05/20/2011 M2.46 INCH FALL RIVER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 5 ESE DOWNTOWN RAPID CI 44.05N 103.14W
05/20/2011 M2.46 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 19 SW BUFFALO 45.39N 103.82W
05/20/2011 M2.43 INCH HARDING SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 15 W MARTIN 43.17N 102.03W
05/20/2011 M2.38 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN CAMP CROOK 45.55N 103.98W
05/20/2011 M2.37 INCH HARDING SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 5 NE DOWNTOWN BELLE FOU 44.72N 103.78W
05/20/2011 M2.36 INCH BUTTE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 2 ENE EDGEMONT 43.31N 103.79W
05/20/2011 M2.29 INCH FALL RIVER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 1 ENE WALL 44.00N 102.22W
05/20/2011 M2.23 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 13 SSE WALL 43.82N 102.14W
05/20/2011 M2.17 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 7 NNE BATESLAND 43.23N 102.05W
05/20/2011 M2.16 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 19 ENE MARTIN 43.28N 101.38W
05/20/2011 M2.16 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 11 E MARTIN 43.17N 101.51W
05/20/2011 M2.15 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 13 NNE MARTIN 43.35N 101.63W
05/20/2011 M2.00 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 2 ENE NEWELL 44.73N 103.38W
05/20/2011 M1.83 INCH BUTTE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN DOWNTOWN SPEARFISH 44.50N 103.86W
05/20/2011 M1.74 INCH LAWRENCE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 36 W FAITH 45.01N 102.77W
05/20/2011 M1.53 INCH MEADE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 14 NW EDGEMONT 43.44N 104.02W
05/20/2011 M1.52 INCH FALL RIVER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 23 ESE WRIGHT 43.62N 105.08W
05/20/2011 M1.31 INCH WESTON WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 16 N DOWNTOWN GILLETTE 44.52N 105.50W
05/20/2011 M1.49 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN ENE DOWNTOWN GILLETTE 44.29N 105.50W
05/20/2011 M1.31 INCH CAMPBELL WY COCORAHS

0700 AM HEAVY RAIN 13 NNW DOWNTOWN GILLETT 44.46N 105.60W
05/20/2011 M1.32 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN ENE DOWNTOWN GILLETTE 44.29N 105.50W
05/20/2011 M1.39 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 WNW DOWNTOWN GILLETTE 44.31N 105.56W
05/20/2011 M1.57 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 33 WNW HULETT 44.86N 105.23W
05/20/2011 M1.65 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 6 SW BEULAH 44.47N 104.17W
05/20/2011 M0.91 INCH CROOK WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 17 S DOWNTOWN NEWCASTLE 43.61N 104.20W
05/20/2011 M1.25 INCH WESTON WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 24 SW BISON 45.28N 102.81W
05/20/2011 M1.43 INCH PERKINS SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 11 SW LEMMON 45.83N 102.32W
05/20/2011 E0.76 INCH PERKINS SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 22 WSW FAITH 44.89N 102.45W
05/20/2011 M1.13 INCH MEADE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 8 W BISON 45.52N 102.63W
05/20/2011 M1.36 INCH PERKINS SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN KADOKA 43.83N 101.51W
05/20/2011 M1.39 INCH JACKSON SD COCORAHS

2 DAY TOTAL

0720 AM HEAVY RAIN 11 NW DOWNTOWN RAPID CI 44.19N 103.39W
05/20/2011 M2.54 INCH MEADE SD TRAINED SPOTTER

0800 AM HEAVY RAIN NEWELL 44.72N 103.42W
05/20/2011 M2.40 INCH BUTTE SD CO-OP OBSERVER

0820 AM HEAVY RAIN 8 SE BISON 45.44N 102.35W
05/20/2011 M1.53 INCH PERKINS SD TRAINED SPOTTER

0830 AM HEAVY RAIN 8 W DOWNTOWN SPEARFISH 44.50N 104.02W
05/20/2011 M1.97 INCH LAWRENCE SD TRAINED SPOTTER

0900 AM HEAVY RAIN 10 WSW RED ELM 45.00N 101.98W
05/20/2011 M1.60 INCH ZIEBACH SD TRAINED SPOTTER

0900 AM HEAVY RAIN 3 NW SAINT ONGE 44.58N 103.76W
05/20/2011 M4.00 INCH LAWRENCE SD TRAINED SPOTTER

0900 AM HEAVY RAIN 4 SW DOWNTOWN RAPID CIT 44.03N 103.29W
05/20/2011 M2.80 INCH PENNINGTON SD TRAINED SPOTTER

0926 AM HEAVY RAIN 10 ESE ZEONA 45.16N 102.71W
05/20/2011 M1.45 INCH PERKINS SD TRAINED SPOTTER

&&

$$

MERICKSO

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KUNR [201607]: Preliminary Local Storm Report

NWUS53 KUNR 201607
LSRUNR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
1006 AM MDT FRI MAY 20 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0700 AM HEAVY RAIN HERMOSA 43.84N 103.19W
05/20/2011 M2.55 INCH CUSTER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 11 SSW OELRICHS 43.03N 103.31W
05/20/2011 M2.46 INCH FALL RIVER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 5 ESE DOWNTOWN RAPID CI 44.05N 103.14W
05/20/2011 M2.46 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 13 W MARTIN 43.17N 101.99W
05/20/2011 M2.44 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 19 SW BUFFALO 45.39N 103.82W
05/20/2011 M2.43 INCH HARDING SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 15 W MARTIN 43.17N 102.03W
05/20/2011 M2.38 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN CAMP CROOK 45.55N 103.98W
05/20/2011 M2.37 INCH HARDING SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 5 NE DOWNTOWN BELLE FOU 44.72N 103.78W
05/20/2011 M2.36 INCH BUTTE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 2 ENE EDGEMONT 43.31N 103.79W
05/20/2011 M2.29 INCH FALL RIVER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 1 ENE WALL 44.00N 102.22W
05/20/2011 M2.23 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 13 SSE WALL 43.82N 102.14W
05/20/2011 M2.17 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 7 NNE BATESLAND 43.23N 102.05W
05/20/2011 M2.16 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 19 ENE MARTIN 43.28N 101.38W
05/20/2011 M2.16 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 11 E MARTIN 43.17N 101.51W
05/20/2011 M2.15 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 13 NNE MARTIN 43.35N 101.63W
05/20/2011 M2.00 INCH BENNETT SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 2 ENE NEWELL 44.73N 103.38W
05/20/2011 M1.83 INCH BUTTE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN DOWNTOWN SPEARFISH 44.50N 103.86W
05/20/2011 M1.74 INCH LAWRENCE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 36 W FAITH 45.01N 102.77W
05/20/2011 M1.53 INCH MEADE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 14 NW EDGEMONT 43.44N 104.02W
05/20/2011 M1.52 INCH FALL RIVER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 23 ESE WRIGHT 43.62N 105.08W
05/20/2011 M1.31 INCH WESTON WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN KADOKA 43.83N 101.51W
05/20/2011 M1.39 INCH JACKSON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 8 W BISON 45.52N 102.63W
05/20/2011 M1.36 INCH PERKINS SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 22 WSW FAITH 44.89N 102.45W
05/20/2011 M1.13 INCH MEADE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 11 SW LEMMON 45.83N 102.32W
05/20/2011 E0.76 INCH PERKINS SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 24 SW BISON 45.28N 102.81W
05/20/2011 M1.43 INCH PERKINS SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 17 S DOWNTOWN NEWCASTLE 43.61N 104.20W
05/20/2011 M1.25 INCH WESTON WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 6 SW BEULAH 44.47N 104.17W
05/20/2011 M0.91 INCH CROOK WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 33 WNW HULETT 44.86N 105.23W
05/20/2011 M1.65 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 WNW DOWNTOWN GILLETTE 44.31N 105.56W
05/20/2011 M1.57 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN ENE DOWNTOWN GILLETTE 44.29N 105.50W
05/20/2011 M1.39 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 13 NNW DOWNTOWN GILLETT 44.46N 105.60W
05/20/2011 M1.32 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN ENE DOWNTOWN GILLETTE 44.29N 105.50W
05/20/2011 M1.31 INCH CAMPBELL WY COCORAHS

0700 AM HEAVY RAIN 16 N DOWNTOWN GILLETTE 44.52N 105.50W
05/20/2011 M1.49 INCH CAMPBELL WY COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 SW HERMOSA 43.81N 103.23W
05/20/2011 M2.54 INCH CUSTER SD CO-OP OBSERVER

0700 AM HEAVY RAIN HOOVER 45.11N 103.27W
05/20/2011 M2.15 INCH BUTTE SD CO-OP OBSERVER

0700 AM HEAVY RAIN PACTOLA RESERVOIR 44.07N 103.50W
05/20/2011 M2.47 INCH PENNINGTON SD CO-OP OBSERVER

0700 AM HEAVY RAIN 4 NW DOWNTOWN RAPID CIT 44.12N 103.29W
05/20/2011 M2.62 INCH PENNINGTON SD CO-OP OBSERVER

0700 AM HEAVY RAIN ORAL 43.40N 103.27W
05/20/2011 M1.96 INCH FALL RIVER SD CO-OP OBSERVER

0700 AM HEAVY RAIN EDGEMONT 43.30N 103.83W
05/20/2011 M1.25 INCH FALL RIVER SD CO-OP OBSERVER

0700 AM HEAVY RAIN 1 S OGLALA 43.17N 102.73W
05/20/2011 M1.62 INCH SHANNON SD CO-OP OBSERVER

0700 AM HEAVY RAIN 11 N PORCUPINE 43.39N 102.33W
05/20/2011 M2.28 INCH SHANNON SD CO-OP OBSERVER

0700 AM HEAVY RAIN 2 ESE COTTONWOOD 43.95N 101.86W
05/20/2011 M1.35 INCH JACKSON SD CO-OP OBSERVER

0700 AM HEAVY RAIN 3 ESE ELM SPRINGS 44.30N 102.47W
05/20/2011 M1.93 INCH MEADE SD CO-OP OBSERVER

0700 AM HEAVY RAIN OPAL 44.89N 102.61W
05/20/2011 M1.70 INCH MEADE SD CO-OP OBSERVER

0700 AM HEAVY RAIN 4 NNW WHITEWOOD 44.51N 103.67W
05/20/2011 M2.58 INCH LAWRENCE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN SILVER CITY 44.09N 103.57W
05/20/2011 M2.62 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 7 SW OELRICHS 43.11N 103.33W
05/20/2011 M2.62 INCH FALL RIVER SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN SSW DOWNTOWN HOT SPRING 43.43N 103.48W
05/20/2011 M2.71 INCH FALL RIVER SD COCORAHS

0700 AM HEAVY RAIN 8 WNW DOWNTOWN RAPID CI 44.12N 103.38W
05/20/2011 M2.74 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 SW NEWELL 44.69N 103.46W
05/20/2011 M2.74 INCH BUTTE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 WNW DOWNTOWN RAPID CI 44.09N 103.29W
05/20/2011 M2.76 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 2 WNW DOWNTOWN RAPID CI 44.09N 103.27W
05/20/2011 M2.77 INCH PENNINGTON SD CO-OP OBSERVER

2 DAY TOTAL

0700 AM HEAVY RAIN 5 SW DOWNTOWN RAPID CIT 44.02N 103.30W
05/20/2011 M2.80 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 1 NW PIEDMONT 44.24N 103.41W
05/20/2011 M2.91 INCH MEADE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN BLACK HAWK 44.15N 103.32W
05/20/2011 M2.95 INCH MEADE SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 3 SSW DOWNTOWN RAPID CI 44.04N 103.26W
05/20/2011 M3.07 INCH PENNINGTON SD COCORAHS

2 DAY TOTAL

0700 AM HEAVY RAIN 7 SW SHADEHILL 45.69N 102.29W
05/20/2011 M0.89 INCH PERKINS SD CO-OP OBSERVER

0720 AM HEAVY RAIN 11 NW DOWNTOWN RAPID CI 44.19N 103.39W
05/20/2011 M2.54 INCH MEADE SD TRAINED SPOTTER

0800 AM HEAVY RAIN NEWELL 44.72N 103.42W
05/20/2011 M2.40 INCH BUTTE SD CO-OP OBSERVER

0820 AM HEAVY RAIN 8 SE BISON 45.44N 102.35W
05/20/2011 M1.53 INCH PERKINS SD TRAINED SPOTTER

0830 AM HEAVY RAIN 8 W DOWNTOWN SPEARFISH 44.50N 104.02W
05/20/2011 M1.97 INCH LAWRENCE SD TRAINED SPOTTER

0900 AM HEAVY RAIN 4 SW DOWNTOWN RAPID CIT 44.03N 103.29W
05/20/2011 M2.80 INCH PENNINGTON SD TRAINED SPOTTER

0900 AM HEAVY RAIN 3 NW SAINT ONGE 44.58N 103.76W
05/20/2011 M4.00 INCH LAWRENCE SD TRAINED SPOTTER

0900 AM HEAVY RAIN 10 WSW RED ELM 45.00N 101.98W
05/20/2011 M1.60 INCH ZIEBACH SD TRAINED SPOTTER

0926 AM HEAVY RAIN 10 ESE ZEONA 45.16N 102.71W
05/20/2011 M1.45 INCH PERKINS SD TRAINED SPOTTER

&&

$$

MERICKSO

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WATCHES: Tornado Watch Number 312

WWUS20 KWNS 201605
SEL2
SPC WW 201605
ARZ000-LAZ000-OKZ000-TXZ000-202300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 312
NWS STORM PREDICTION CENTER NORMAN OK
1105 AM CDT FRI MAY 20 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

WESTERN ARKANSAS
NORTHWEST LOUISIANA
EASTERN OKLAHOMA
NORTHEAST TEXAS

EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1105 AM UNTIL 600
PM CDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHWEST OF
RUSSELLVILLE ARKANSAS TO 5 MILES SOUTHEAST OF LONGVIEW TEXAS.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

DISCUSSION...TSTMS SHOULD CONTINUE TO INTENSIFY THIS AFTERNOON AS
THEY ENCOUNTER A VERY MOIST AND MODERATELY UNSTABLE AIR MASS WITH
MLCAPE VALUES INCREASING TO 1500-2500 J/KG. WHILE MID AND
HIGH-LEVEL WIND FIELD WILL REMAIN MARGINAL FOR STORM
ORGANIZATION...THE PRESENCE OF A 40-50 KT SLY LLJ AND RESULTANT
EFFECTIVE SRH OF 250-400 M2/S2 WILL PROMOTE ENHANCED LOW-LEVEL STORM
ROTATION WITH A RISK FOR TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 22030.

...MEAD

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