KCHS [211921]: Preliminary Local Storm Report

NWUS52 KCHS 211921
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
321 PM EDT SUN APR 21 2013

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

0250 PM NON-TSTM WND GST 1 N TYBEE ISLAND 32.02N 80.85W
04/21/2013 M40 MPH CHATHAM GA MESONET

THE WEATHERFLOW SENSOR ON NORTH TYBEE ISLAND REPORTED A
WIND GUST OF 40 MPH.


&&

EVENT NUMBER CHS1300208

$$

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KTFX [211921]: Preliminary Local Storm Report

NWUS55 KTFX 211921
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
120 PM MDT SUN APR 21 2013

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

0700 AM SNOW BIG SANDY 48.18N 110.11W
04/21/2013 M4.0 INCH CHOUTEAU MT TRAINED SPOTTER

3 TO 4 INCHES OF NEW SNOW OVERNIGHT.


&&

$$

NJL

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KMSO [211909]: Preliminary Local Storm Report...summary

NWUS55 KMSO 211909
LSRMSO

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MISSOULA MT
107 PM MDT SUN APR 21 2013


...PRELIMINARY SNOWFALL AMOUNTS REPORTED SO FAR TODAY...


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

0100 PM SNOW KALISPELL 48.20N 114.31W
04/21/2013 E3 INCH FLATHEAD MT PUBLIC



1240 PM SNOW SEELEY LAKE 47.18N 113.48W
04/21/2013 M5 INCH MISSOULA MT TRAINED SPOTTER



1235 PM SNOW 1 E POLSON 47.69N 114.14W
04/21/2013 M4 INCH LAKE MT TRAINED SPOTTER



1200 PM SNOW CONDON 47.53N 113.71W
04/21/2013 M7 INCH MISSOULA MT TRAINED SPOTTER


&&

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KMSO [211905]: Preliminary Local Storm Report

NWUS55 KMSO 211905
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
104 PM MDT SUN APR 21 2013

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

0100 PM SNOW KALISPELL 48.20N 114.31W
04/21/2013 E3 INCH FLATHEAD MT PUBLIC



&&

$$

IRIS SYSTEM

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KGJT [211852]: Preliminary Local Storm Report

NWUS55 KGJT 211852
LSRGJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1252 PM MDT SUN APR 21 2013

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

0700 AM SNOW 2 W VAIL 39.65N 106.40W
04/21/2013 M2.5 INCH EAGLE CO COCORAHS

24 HOUR SNOWFALL.


&&

EVENT NUMBER GJT1301085

$$

DC

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KGJT [211850]: Preliminary Local Storm Report

NWUS55 KGJT 211850
LSRGJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1249 PM MDT SUN APR 21 2013

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

0700 AM SNOW GOTHIC 38.96N 106.99W
04/21/2013 M5.0 INCH GUNNISON CO CAIC

24 HOUR SNOWFALL.


&&

EVENT NUMBER GJT1301084

$$

DC

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KGJT [211847]: Preliminary Local Storm Report

NWUS55 KGJT 211847
LSRGJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1247 PM MDT SUN APR 21 2013

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

0939 AM SNOW CRESTED BUTTE 38.87N 106.98W
04/21/2013 M3.3 INCH GUNNISON CO CO-OP OBSERVER

24 HOUR SNOWFALL.


&&

EVENT NUMBER GJT1301083

$$

DC

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KMSO [211845]: Preliminary Local Storm Report

NWUS55 KMSO 211845
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1244 PM MDT SUN APR 21 2013

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

1240 PM SNOW SEELEY LAKE 47.18N 113.48W
04/21/2013 M5 INCH MISSOULA MT TRAINED SPOTTER



&&

$$

IRIS SYSTEM

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KMSO [211844]: Preliminary Local Storm Report

NWUS55 KMSO 211844
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1243 PM MDT SUN APR 21 2013

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

1235 PM SNOW 1 E POLSON 47.69N 114.14W
04/21/2013 M4 INCH LAKE MT TRAINED SPOTTER



&&

$$

IRIS SYSTEM

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KCHS [211818]: Preliminary Local Storm Report

NWUS52 KCHS 211818
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
218 PM EDT SUN APR 21 2013

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

0217 PM NON-TSTM WND GST 3 NE FOLLY BEACH 32.69N 79.89W
04/21/2013 M41 MPH CHARLESTON SC C-MAN STATION


&&

EVENT NUMBER CHS1300207

$$

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KGJT [211811]: Preliminary Local Storm Report

NWUS55 KGJT 211811
LSRGJT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1211 PM MDT SUN APR 21 2013

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

0834 AM SNOW 1 NW AVON 39.66N 106.54W
04/21/2013 M1.0 INCH EAGLE CO TRAINED SPOTTER

24 HOUR SNOWFALL.


&&

EVENT NUMBER GJT1301082

$$

DC

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KMSO [211809]: Preliminary Local Storm Report

NWUS55 KMSO 211809
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1209 PM MDT SUN APR 21 2013

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

1200 PM SNOW CONDON 47.53N 113.71W
04/21/2013 M7 INCH MISSOULA MT TRAINED SPOTTER



&&

$$

IRIS SYSTEM

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KCHS [211738]: Preliminary Local Storm Report

NWUS52 KCHS 211738
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
138 PM EDT SUN APR 21 2013

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

0125 PM NON-TSTM WND GST 1 ESE ISLE OF PALMS 32.78N 79.79W
04/21/2013 M47 MPH CHARLESTON SC MESONET

WEATHERFLOW SENSOR ON THE ISLE OF PALMS PIER REPORTED A
WIND GUST OF 47 MPH.


&&

EVENT NUMBER CHS1300206

$$

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KCHS [211733]: Preliminary Local Storm Report

NWUS52 KCHS 211733
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
133 PM EDT SUN APR 21 2013

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

0132 PM HIGH SURF FOLLY BEACH 32.66N 79.92W
04/21/2013 CHARLESTON SC LIFEGUARD

VERY STRONG LONGSHORE CURRENT BEING REPORTED. OCEAN
EXTREMELY CHOPPY AND DANGEROUS. SURF BREAKERS ARE
AVERAGING 5 FT AND RISING.


&&

EVENT NUMBER CHS1300205

$$

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KCHS [211729]: Preliminary Local Storm Report

NWUS52 KCHS 211729
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
129 PM EDT SUN APR 21 2013

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

0128 PM HIGH SURF ISLE OF PALMS 32.79N 79.80W
04/21/2013 CHARLESTON SC LIFEGUARD

DANGEROUS SURF BEING REPORTED AT ISLE OF PALMS COUNTY
PARK. BREAKERS ARE AVERAGING AROUND 5 FT AND BUILDING.


&&

EVENT NUMBER CHS1300204

$$

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MESO: Mesoscale Discussion 0547

ACUS11 KWNS 211655
SWOMCD
SPC MCD 211654
FLZ000-211930-

MESOSCALE DISCUSSION 0547
NWS STORM PREDICTION CENTER NORMAN OK
1154 AM CDT SUN APR 21 2013

AREAS AFFECTED...PORTIONS CENTRAL/SRN FL.

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 211654Z - 211930Z

PROBABILITY OF WATCH ISSUANCE...20 PERCENT

SUMMARY...SEA BREEZE CONVECTION FCST TO INCREASE IN
COVERAGE/INTENSITY...BECOMING NUMEROUS THIS AFTN PER SPC ENHANCED
TSTM OUTLOOK. MAIN THREAT WILL BE ISOLATED DAMAGING
DOWNDRAFTS...WITH MRGL SVR HAIL ALSO POSSIBLE. FOCI FOR LOCALLY
ENHANCED RISK SHOULD BE INVOF OUTFLOW-OUTFLOW AND OUTFLOW-SEA BREEZE
BOUNDARY INTERSECTIONS. ATTM...POTENTIAL ORGANIZATION/COVERAGE
APPEARS TOO LOW FOR WW.

DISCUSSION...16Z SFC MESOANALYSIS INDICATES WEAKENING/ORIGINAL
SYNOPTIC FRONT IS QUASISTATIONARY OVER SRN FL...ACROSS PORTIONS PALM
BEACH/HENDRY/COLLIER COUNTIES...AND MAINLY IS MANIFEST AS WIND SHIFT
LINE AWAY FROM SEA BREEZE/OUTFLOW BOUNDARIES. SECOND/STRONGER
BAROCLINIC ZONE...WHICH ALSO WAS EVIDENT IN 12Z 925-MB
ANALYSIS...HAS BECOME BETTER EVIDENT AT SFC AMIDST DIFFERENTIAL
DIABATIC HEATING AND DEEP ELYS TO ITS S. LATTER FRONTAL ZONE WAS
LOCATED NEAR I-4 CORRIDOR DAB-TBW AND MAY DRIFT NWWD. VIS IMAGE
LOOPS AND SFC DATA INDICATE OUTFLOW BOUNDARIES FROM EARLIER
CONVECTION OVER GULF STREAM HAS EFFECTIVELY BOWED SEA BREEZE
BOUNDARY INLAND FROM NRN ST LUCIE INTO ERN OSCEOLA COUNTIES...AS
WELL AS OVER SRN PALM BEACH...CENTRAL BROWARD AND NRN MIAMI-DADE
COUNTIES. CONVECTION ALREADY HAS FORMED ALONG THAT BOUNDARY OVER
INTERIOR BROWARD/MIAMI-DADE COUNTY LINE...WITH ADDITIONAL TSTMS
EXPECTED FARTHER N UP E COAST SEA BREEZE IN NEXT 2-3 HOURS.

PW S OF NRN FRONT AND INLAND FROM SEA BREEZES COMMONLY IS IN
1.5-1.75 INCH RANGE AND LOCALLY GREATER...BASED ON GPS-PW
READINGS...MODIFIED RAOBS AND FCST SOUNDINGS. CONTINUED DIABATIC
HEATING IN MOISTURE-RICH/PRECONVECTIVE/INLAND AIR MASS ALREADY IS
RAISING 0-3 KM CAPE SUBSTANTIALLY AND REMOVING CINH...AND SHOULD
BOOST MLCAPE INTO 1500-2000 J/KG RANGE AWAY FROM TSTMS/OUTFLOW.
THIS...ALONG WITH DEPTH OF BUOYANT LAYER IN SOUNDINGS...INDICATES
POTENTIAL FOR LOCALLY STG PRECIP LOADING AND RELATED RISK FOR
DOWNBURSTS NEAR SVR LEVELS AND CAPABLE OF CAUSING DAMAGE.
KINEMATICALLY...WEAK/CHAOTIC 0-3 KM AGL FLOW YIELDS WEAK LOW-LEVEL
SHEAR FROM VWP. HOWEVER...STG UPPER/ANVIL-LEVEL WINDS IN MORNING
RAOBS AND FCST SOUNDINGS SUGGESTS ENHANCED CONVECTIVE VENTILATION
ALOFT AND RELATED CONTRIBUTION TO STORM MAINTENANCE/ORGANIZATION.

..EDWARDS/MEAD.. 04/21/2013

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

ATTN...WFO...MFL...MLB...TBW...

LAT...LON 28368080 27188023 26718031 26298044 25868043 25498040
25238058 25308083 25668112 25968162 26148180 26428188
26418204 26508219 26888230 27288255 27638258 28098159
28458091 28368080

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KCHS [211647]: Preliminary Local Storm Report

NWUS52 KCHS 211647
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1247 PM EDT SUN APR 21 2013

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

1229 PM NON-TSTM WND DMG 2 SW MOUNT PLEASANT TOW 32.81N 79.85W
04/21/2013 CHARLESTON SC LAW ENFORCEMENT

TREE DOWN REPORTED AT MARK CLARK EXPRESSWAY EAST AND
NORTH HIGHWAY 17.


&&

EVENT NUMBER CHS1300203

$$

TIMTE

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DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 211639
SWODY2
SPC AC 211638

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1138 AM CDT SUN APR 21 2013

VALID 221200Z - 231200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM SRN KS INTO NRN OK...

...SYNOPSIS...
A POSITIVELY TILTED UPPER TROUGH WILL MOVE SEWD ACROSS THE NRN AND
CNTRL PLAINS WITH A SECONDARY FEATURE DIGGING SWD ACROSS THE GREAT
BASIN LATE. AT THE SURFACE...A COLD FRONT WILL SURGE SWD ACROSS
CO/NEB/KS DURING THE DAY...AND INTO WRN TX AND OK OVERNIGHT.

AHEAD OF THE FRONT...SLY SURFACE WINDS WILL HELP TRANSPORT BOUNDARY
LAYER DEWPOINTS IN THE 40S TO LOWER 50S INTO SRN KS...WHERE HEATING
AND FORCING NEAR THE FRONT WILL LEAD TO SCATTERED THUNDERSTORMS.

...SRN KS INTO NRN OK...
RAIN AND A FEW WEAK THUNDERSTORMS SHOULD BE ONGOING ACROSS MUCH OF
NEB NEAR THE COLD FRONT...AIDED BY WARM ADVECTION WITH A SLY LOW
LEVEL JET. AHEAD OF THE FRONT...HEATING WILL OCCUR AND DUE TO COLD
MIDLEVEL TEMPERATURES...VERY STEEP LAPSE RATES WILL BE PRESENT
ACROSS MUCH OF SWRN KS INTO THE OK AND TX PANHANDLES. AS
SUCH...CAPPING WILL BE COMPLETELY ERODED BY EARLY
AFTERNOON...ALTHOUGH MOISTURE IN THE HEATED AIR WILL BE MARGINAL.
INITIALLY HIGH BASED CONVECTION IS EXPECTED TO FORM...THEN DEVELOP
ESEWD WITH A WIND AND HAIL THREAT. A FEW SUPERCELLS ARE EXPECTED
GIVEN LONG HODOGRAPHS AND VEERING LOW LEVEL WINDS AHEAD OF THE
FRONT. THE THREAT AREA IS EXPECTED TO BE RELATIVELY SMALL...BOUNDED
BY THE SURGING COLD FRONT TO THE N AND INCREASING CAPPING ROUGHLY S
OF INTERSTATE 40. STORMS MAY PERSIST INTO THE EVENING IN THE FORM OF
A SMALL MCS AS THE LOW LEVEL JET WILL BE STRONG.

..JEWELL.. 04/21/2013

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KCHS [211625]: Preliminary Local Storm Report

NWUS52 KCHS 211625
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1225 PM EDT SUN APR 21 2013

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

1209 PM NON-TSTM WND DMG 3 WNW SANTEE COASTAL RE 33.17N 79.42W
04/21/2013 CHARLESTON SC LAW ENFORCEMENT

TREE DOWN AT NORTH HIGHWAY 17 AND SOUTH SANTEE ROAD.


&&

EVENT NUMBER CHS1300202

$$

TIMTE

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KCHS [211612]: Preliminary Local Storm Report

NWUS52 KCHS 211612
LSRCHS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1211 PM EDT SUN APR 21 2013

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

1200 PM RIP CURRENTS TYBEE ISLAND 32.02N 80.86W
04/21/2013 CHATHAM GA LIFEGUARD

LIFEGUARDS REPORTED SMALL RIP CURRENTS.


&&

EVENT NUMBER CHS1300201

$$

TIMTE

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 211555
SWODY1
SPC AC 211552

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1052 AM CDT SUN APR 21 2013

VALID 211630Z - 221200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...

A BROAD...CYCLONIC FLOW REGIME WILL BE MAINTAINED OVER THE CONUS
THROUGH THE D1 PERIOD. WITHIN THIS LARGE-SCALE PATTERN...A
SHORT-WAVE TROUGH FROM THE OZARK PLATEAU TO NWRN GULF COAST WILL
TRANSLATE EWD ACROSS THE GULF COAST STATES. THIS SYSTEM WILL
PRECEDE MID AND UPPER-LEVEL JET STREAKS AND AN ASSOCIATED SHORT-WAVE
TROUGH WHICH WILL AMPLIFY WHILE PROGRESSING SEWD FROM THE BRITISH
COLUMBIA COAST INTO PACIFIC NW AND NRN INTERMOUNTAIN REGION.
ELSEWHERE...A SERIES OF WEAKER PERTURBATIONS WILL ADVANCE FROM THE
NRN/CNTRL PLAINS INTO THE UPPER GREAT LAKES AND OH VALLEY.

IN THE LOW LEVELS...A COLD FRONT FROM THE CNTRL DAKOTAS INTO NRN
INTERMOUNTAIN REGION WILL PROGRESS ESEWD THROUGH THE UPPER MS AND
MID MO VALLEYS...AND SWD INTO THE CNTRL ROCKIES BY MONDAY MORNING.

...FL THIS AFTERNOON AND EVENING...

THE 12Z MIAMI SOUNDING SHOWS THAT NOTABLE COOLING HAS OCCURRED ABOVE
600 MB SINCE 00Z...WHICH WHEN COUPLED WITH A COMPARABLY MORE MOIST
BOUNDARY LAYER...WILL RESULT IN A MORE UNSTABLE AIR MASS THAN
YESTERDAY WITH MLCAPE APPROACHING 1500 J/KG. MOREOVER...AN ELY
COMPONENT TO THE LOW-LEVEL WIND FIELD WILL AUGMENT MODEST /20-30 KT/
WLY WINDS IN THE MID LEVELS TO YIELD SUFFICIENT VERTICAL SHEAR FOR
SOME STORM ORGANIZATION.

INCREASED LARGE-SCALE FORCING/DCVA ASSOCIATED WITH A WEAK MIDLEVEL
VORTICITY MAXIMUM CURRENTLY OVER THE CNTRL G.O.M. WILL ENHANCE
LOW-LEVEL CONVERGENCE ALONG DEVELOPING SEA BREEZE FRONTS AND
CONVECTIVE OUTFLOW BOUNDARIES /OBSERVED OVER THE E-CNTRL/SERN
PENINSULA/ TO YIELD SCATTERED TO NUMEROUS STORMS THIS AFTERNOON.
GIVEN THE MODERATE INSTABILITY AND RELATIVELY COOL MIDLEVEL
TEMPERATURES...A RISK FOR ISOLATED DAMAGING WIND GUSTS AND HAIL WILL
EXIST THROUGH THIS EVENING.

...MID MO VALLEY THIS AFTERNOON AND EVENING...

DESPITE THE PRESENCE OF A RELATIVELY DRY AIR MASS /I.E. PW VALUES
GENERALLY LESS THAN .6 INCH/...DAYTIME HEATING COUPLED WITH
700-500-MB LAPSE RATES OF 7.0-7.5 C/KM WILL SUPPORT MODEST
DESTABILIZATION TODAY AHEAD OF THE COLD FRONT. FORCING FOR ASCENT
ATTENDANT TO MIGRATORY IMPULSES MOVING ACROSS THE REGION WILL
COMBINE WITH LOW-LEVEL UPLIFT ALONG THE FRONT TO FOSTER WIDELY
SCATTERED TSTMS LATE THIS AFTERNOON INTO EVENING. GUSTY WINDS AND
SOME SMALL HAIL MAY ACCOMPANY THE STRONGEST STORMS...THOUGH THE
LIMITED INSTABILITY WILL PRECLUDE ORGANIZED...SEVERE STORM
POTENTIAL.

..MEAD/CARBIN.. 04/21/2013

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KTFX [211554]: Preliminary Local Storm Report

NWUS55 KTFX 211554
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
954 AM MDT SUN APR 21 2013

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

0951 AM SNOW 13 ESE LOMA 47.88N 110.24W
04/21/2013 E2.0 INCH CHOUTEAU MT TRAINED SPOTTER

ESTIMATED 2.0 INCHES OF SNOWFALL 20 MILES NORTH OF
GERALDINE FROM BETWEEN 9 PM MDT ON THE 20TH THROUGH
AROUND 8 AM MDT ON THE 21ST. NOT CURRENTLY SNOWING.
ELEVATION 3115 FEET MSL.


&&

$$

COULSTON

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KTFX [211551]: Preliminary Local Storm Report

NWUS55 KTFX 211551
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
951 AM MDT SUN APR 21 2013

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

0905 AM SNOW 8 WSW FAIRFIELD 47.58N 112.15W
04/21/2013 M4.0 INCH TETON MT TRAINED SPOTTER

MEASURED APPROXIMATELY 4.0 INCHES OF SNOWFALL 8 MILES
WSW OF FAIRFIELD OVERNIGHT. STILL SNOWING LIGHTLY. LOCAL
ROADS ARE VERY ICY. ELEVATION 4310 FEET MSL.


&&

$$

COULSTON

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KIND [211545]: Preliminary Local Storm Report

NWUS53 KIND 211545
LSRIND

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1145 AM EDT SUN APR 21 2013

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

0100 AM FLOOD ARCADIA 40.17N 86.02W
04/20/2013 HAMILTON IN BROADCAST MEDIA

*** 1 FATAL *** 42 YEAR OLD MAN DIED WHEN HIS VEHICLE
ENTERED A FLOODED ROAD ON MT. PLEASANT ROAD NEAR 266TH
STREET.


&&

$$

MDR

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KTFX [211535]: Preliminary Local Storm Report...corrected

NWUS55 KTFX 211535
LSRTFX

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GREAT FALLS MT
934 AM MDT SUN APR 21 2013

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

0400 AM HEAVY SNOW 23 W BYNUM 47.92N 112.79W
04/21/2013 E15.0 INCH TETON MT MESONET

ESTIMATED 15.0 INCHES OF SNOWFALL FROM 7 PM MDT ON THE
20TH THROUGH 4 AM MDT ON THE 21ST AT WALDRON SNOTEL
SITE. ESTIMATED 0.90 INCHES OF LIQUID WATER EQUIVALENT.
NOT CURRENTLY REPORTING SNOWFALL. ELEVATION 5600 FEET.


&&

CORRECTED EVENT TIME...EVENT...REMARKS

$$

COULSTON

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KTFX [211511]: Preliminary Local Storm Report

NWUS55 KTFX 211511
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
911 AM MDT SUN APR 21 2013

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

0600 AM HEAVY SNOW 20 W AUGUSTA 47.45N 112.81W
04/21/2013 E6.0 INCH LEWIS AND CLARK MT MESONET

ESTIMATED 6.0 INCHES OF SNOWFALL FROM 3 AM MDT THROUGH
6 AM MDT ON THE 21ST AT WOOD CREEK SNOTEL SITE.
ESTIMATED 0.30 INCHES OF LIQUID WATER EQUIVALENT. NOT
CURRENTLY REPORTING SNOWFALL. ELEVATION 5960 FEET MSL.


&&

$$

COULSTON

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KTFX [211501]: Preliminary Local Storm Report

NWUS55 KTFX 211501
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
901 AM MDT SUN APR 21 2013

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

0500 AM HEAVY SNOW 24 W BYNUM 47.92N 112.82W
04/21/2013 E16.0 INCH TETON MT MESONET

ESTIMATED 16.0 INCHES OF SNOWFALL FROM 8 PM MDT ON THE
20TH THROUGH 5 AM MDT ON THE 21ST AT MOUNT LOCKHART
SNOTEL SITE. ESTIMATED 1.30 INCHES OF LIQUID WATER
EQUIVALENT. ELEVATION 6400 FEET MSL.


&&

$$

COULSTON

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KBIS [211500]: Preliminary Local Storm Report

NWUS53 KBIS 211500
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1000 AM CDT SUN APR 21 2013

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

1000 AM SNOW BOTTINEAU 48.83N 100.44W
04/21/2013 M3.1 INCH BOTTINEAU ND CO-OP OBSERVER


&&

$$

MMATHEWS

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KTFX [211458]: Preliminary Local Storm Report

NWUS55 KTFX 211458
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
858 AM MDT SUN APR 21 2013

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

0600 AM HEAVY SNOW 15 SW DUPUYER 48.06N 112.76W
04/21/2013 E16.0 INCH TETON MT MESONET

ESTIMATED 16.0 INCHES OF SNOWFALL FROM 9 PM MDT ON THE
20TH THROUGH 6 AM MDT ON THE 21ST. ESTIMATED 1.20 INCHES
OF LIQUID WATER EQUIVALENT. NOT CURRENTLY REPORTING
SNOWFALL. ELEVATION 5750 FEET MSL.


&&

$$

COULSTON

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KTFX [211452]: Preliminary Local Storm Report

NWUS55 KTFX 211452
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
851 AM MDT SUN APR 21 2013

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

0200 AM HEAVY SNOW 14 SW HEART BUTTE 48.13N 113.02W
04/21/2013 E18.0 INCH PONDERA MT MESONET

ESTIMATED 18.0 INCHES OF SNOWFALL BETWEEN 2 PM MDT ON
THE 20TH AND 2 AM MDT ON THE 21ST AT BADGER PASS SNOTEL
SITE. ESTIMATED 1.90 INCHES OF LIQUID WATER EQUIVALENT.
NOT CURRENTLY REPORTING SNOWFALL. ELEVATION 6900 FEET
MSL.


&&

$$

COULSTON

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KTFX [211447]: Preliminary Local Storm Report

NWUS55 KTFX 211447
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
847 AM MDT SUN APR 21 2013

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

0700 AM HEAVY SNOW 11 SSW EAST GLACIER PAR 48.30N 113.33W
04/21/2013 E11.0 INCH GLACIER MT MESONET

ESTIMATED 11.0 INCHES OF SNOWFALL FROM 7 PM MDT ON THE
20TH THROUGH 7 AM MDT ON THE 21ST AT PIKE CREEK SNOTEL
SITE. ESTIMATED 0.60 INCHES OF LIQUID WATER EQUIVALENT.
NOT CURRENTLY REPORTING SNOWFALL. ELEVATION 5930 FEET
MSL.


&&

$$

COULSTON

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KTFX [211439]: Preliminary Local Storm Report

NWUS55 KTFX 211439
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
839 AM MDT SUN APR 21 2013

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

0700 AM HEAVY SNOW 11 WSW BABB 48.80N 113.67W
04/21/2013 E8.0 INCH GLACIER MT MESONET

ESTIMATED 8.0 INCHES OF NEW SNOWFALL BETWEEN 8 PM MDT
ON THE 20TH AND 6 AM MDT ON THE 21ST AT MANY GLACIER
SNOTEL. ESTIMATED 0.40 INCHES OF LIQUID WATER
EQUIVALENT. NOT CURRENTLY REPORTING SNOWFALL. ELEVATION
4900 FEET MSL.


&&

$$

COULSTON

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KTFX [211420]: Preliminary Local Storm Report

NWUS55 KTFX 211420
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
820 AM MDT SUN APR 21 2013

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

0500 AM HEAVY SNOW 1 NW HEART BUTTE 48.30N 112.85W
04/21/2013 M11.8 INCH GLACIER MT CO-OP OBSERVER

11.8 INCHES OF SNOWFALL FROM 630 PM MDT ON THE 20TH
THROUGH 500 AM MDT ON THE 21ST. STILL SNOWING LIGHTLY.
0.80 INCHES OF LIQUID WATER EQUIVALENT.


&&

$$

COULSTON

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KARX [211417]: Preliminary Local Storm Report

NWUS53 KARX 211417
LSRARX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
917 AM CDT SUN APR 21 2013

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

0917 AM SNOW 3 SW WYKOFF 43.68N 92.31W
04/21/2013 M1.6 INCH FILLMORE MN PUBLIC

SNOW DURATION 24 HOURS

0700 AM SNOW OSSEO 44.58N 91.22W
04/21/2013 M1.2 INCH TREMPEALEAU WI COOP OBSERVER

REPORTED AT COOP OBSERVER STATION OSOW3 SNOW
DURATION 24 HOURS

0700 AM SNOW 3 NNW SHORTVILLE 44.54N 90.53W
04/21/2013 M1.2 INCH CLARK WI COOP OBSERVER

REPORTED AT COOP OBSERVER STATION NELW3 SNOW
DURATION 24 HOURS

0824 AM SNOW WAUKON 43.27N 91.48W
04/21/2013 M1.0 INCH ALLAMAKEE IA PUBLIC

SNOW DURATION 24 HOURS

0800 AM SNOW PRESTON 43.67N 92.07W
04/21/2013 M0.6 INCH FILLMORE MN COOP OBSERVER

REPORTED AT COOP OBSERVER STATION PTNM5 SNOW
DURATION 24 HOURS

0827 AM SNOW 4 SW ELBA 44.04N 92.06W
04/21/2013 M0.5 INCH WINONA MN PUBLIC

SNOW DURATION 24 HOURS

0700 AM SNOW 2 NE CRESCO 43.39N 92.09W
04/21/2013 M0.4 INCH HOWARD IA COOP OBSERVER

REPORTED AT COOP OBSERVER STATION CRCI4 SNOW
DURATION 24 HOURS

0800 AM SNOW 2 NNE OWEN 44.98N 90.55W
04/21/2013 M0.4 INCH CLARK WI COOP OBSERVER

REPORTED AT COOP OBSERVER STATION OWEW3 SNOW
DURATION 24 HOURS

&&

$$

ZT

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KMSO [211413]: Preliminary Local Storm Report

NWUS55 KMSO 211413
LSRMSO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
812 AM MDT SUN APR 21 2013

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

0800 AM SNOW CONDON 47.53N 113.71W
04/21/2013 U5 INCH MISSOULA MT PUBLIC

5" SINCE 4AM MDT AKA 5" IN 4 HOURS

&&

$$

IRIS SYSTEM

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KBIS [211405]: Preliminary Local Storm Report

NWUS53 KBIS 211405
LSRBIS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
904 AM CDT SUN APR 21 2013

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

0901 AM SNOW 3 S MINOT 48.19N 101.30W
04/21/2013 M1.8 INCH WARD ND CO-OP OBSERVER


&&

$$

MMATHEWS

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KTFX [211403]: Preliminary Local Storm Report

NWUS55 KTFX 211403
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
803 AM MDT SUN APR 21 2013

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

0630 AM HEAVY SNOW 4 SSE BYNUM 47.93N 112.28W
04/21/2013 M7.0 INCH TETON MT CO-OP OBSERVER

7.0 INCHES NEW SNOWFALL PAST 12 HOURS


&&

$$

UTTECH

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KTFX [211401]: Preliminary Local Storm Report

NWUS55 KTFX 211401
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
800 AM MDT SUN APR 21 2013

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

0600 AM SNOW 5 SW GREAT FALLS 47.46N 111.38W
04/21/2013 M5.6 INCH CASCADE MT OFFICIAL NWS OBS

5.6 INCHES NEW SNOWFALL PAST 12 HOURS


&&

$$

UTTECH

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KTFX [211359]: Preliminary Local Storm Report...corrected

NWUS55 KTFX 211359
LSRTFX

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GREAT FALLS MT
758 AM MDT SUN APR 21 2013

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

0754 AM HEAVY SNOW GREAT FALLS 47.50N 111.29W
04/21/2013 E6.0 INCH CASCADE MT PUBLIC

6.0 INCHES NEW SNOWFALL PAST 12 HOURS


&&

CORRECTED EVENT

$$

UTTECH

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KTFX [211356]: Preliminary Local Storm Report

NWUS55 KTFX 211356
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
756 AM MDT SUN APR 21 2013

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

0754 AM SNOW GREAT FALLS 47.50N 111.29W
04/21/2013 E6.0 INCH CASCADE MT PUBLIC

6.0 INCHES NEW SNOWFALL PAST 12 HOURS


&&

$$

UTTECH

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KRNK [211333]: Preliminary Local Storm Report

NWUS51 KRNK 211333
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
933 AM EDT SUN APR 21 2013

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

0453 PM TSTM WND DMG 3 N HURT 37.13N 79.29W
04/19/2013 CAMPBELL VA TRAINED SPOTTER

TREE DOWN ON HOUSE ON FRAZIER ROAD.


&&

$$

PJH

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KRNK [211333]: Preliminary Local Storm Report

NWUS51 KRNK 211333
LSRRNK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BLACKSBURG VA
933 AM EDT SUN APR 21 2013

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

0454 PM TSTM WND DMG 3 N HURT 37.13N 79.28W
04/19/2013 CAMPBELL VA TRAINED SPOTTER

TREE DOWN ALONG LYNCH MILL ROAD.


&&

$$

PJH

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KRNK [211310]: Preliminary Local Storm Report...corrected

NWUS51 KRNK 211310 CCA
LSRRNK

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BLACKSBURG VA
910 AM EDT SUN APR 21 2013

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

0244 PM TSTM WND DMG 1 W TOAST 36.49N 80.65W
04/19/2013 SURRY NC EMERGENCY MNGR

..INCORRECTLY LOGGED DUPLICATE REPORT..


&&

EVENT NUMBER RNK1301333

$$

MBS

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KRNK [211309]: Preliminary Local Storm Report...corrected

NWUS51 KRNK 211309 CCA
LSRRNK

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BLACKSBURG VA
905 AM EDT SUN APR 21 2013

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

0240 PM TSTM WND DMG 3 S PINE RIDGE 36.46N 80.72W
04/19/2013 SURRY NC EMERGENCY MNGR

..INCORRECTLY LOGGED DUPLICATE REPORT..

&&

EVENT NUMBER RNK1301334

$$

MBS

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KMQT [211234]: Preliminary Local Storm Report

NWUS53 KMQT 211234
LSRMQT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MARQUETTE MI
834 AM EDT SUN APR 21 2013

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

0800 PM SNOW NEWBERRY 46.35N 85.51W
04/20/2013 M4.7 INCH LUCE MI TRAINED SPOTTER

12 HOUR TOTAL.


&&

$$

DODSON

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KTFX [211053]: Preliminary Local Storm Report

NWUS55 KTFX 211053
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
452 AM MDT SUN APR 21 2013

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

0330 AM HEAVY SNOW 23 W BYNUM 47.92N 112.79W
04/21/2013 M13.0 INCH TETON MT MESONET

WALDRON SNOTEL MEASURES 12-HOUR SNOWFALL OF 13.0
INCHES. ELEVATION 5600 FEET.


&&

$$

MLV

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KTFX [211051]: Preliminary Local Storm Report

NWUS55 KTFX 211051
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
451 AM MDT SUN APR 21 2013

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

0330 AM HEAVY SNOW 15 SW DUPUYER 48.06N 112.76W
04/21/2013 M12.0 INCH TETON MT MESONET

DUPUYER CREEK SNOTEL MEASURES 12-HOUR SNOWFALL OF 12.0
INCHES. ELEVATION 5750 FEET.


&&

$$

MLV

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KTFX [211050]: Preliminary Local Storm Report

NWUS55 KTFX 211050
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
450 AM MDT SUN APR 21 2013

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

0330 AM HEAVY SNOW 11 SSW EAST GLACIER PAR 48.30N 113.33W
04/21/2013 M11.0 INCH GLACIER MT MESONET

PIKE CREEK SNOTEL MEASURES 12-HOUR SNOWFALL OF 11.0
INCHES. ELEVATION 5928 FEET.


&&

$$

MLV

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KTFX [211049]: Preliminary Local Storm Report

NWUS55 KTFX 211049
LSRTFX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
449 AM MDT SUN APR 21 2013

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

0447 AM HEAVY SNOW 14 SW HEART BUTTE 48.13N 113.02W
04/21/2013 M18.0 INCH PONDERA MT MESONET

BADGER PASS SNOTEL MEASURES 12-HOUR SNOWFALL OF 18.0
INCHES. ELEVATION 6900 FEET.


&&

$$

MLV

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DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 210900
SWOD48
SPC AC 210859

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0359 AM CDT SUN APR 21 2013

VALID 241200Z - 291200Z

...DISCUSSION...
AMPLIFIED/BROADLY CYCLONIC UPPER PATTERN THROUGH EARLY/MID WEEK WILL
BECOME INCREASINGLY ZONAL THROUGH THE LAST HALF OF THE WEEK.
GUIDANCE VARIABILITY INITIALLY EXISTS REGARDING A SOUTHERN STREAM
CUT-OFF LOW /EMANATING FROM THE EASTERN PACIFIC AND BAJA
VICINITY/...WITH OVERALL SPECIFIC PREDICTABILITY OTHERWISE
CONSIDERABLY DECREASING THROUGH DAYS 6-8 WITHIN THE AFOREMENTIONED
ZONAL REGIME.

ON DAY 4/WEDNESDAY...TSTMS/SOME POSSIBLY SEVERE MAY CONTINUE INTO
THE GULF COAST REGION/SOUTHEAST STATES ALONG THE ADVANCING COLD
FRONT...POTENTIALLY INCLUDING PORTIONS OF MS/AL/GA. WHILE SOME
SEVERE MAY BE POSSIBLE...A WIDESPREAD SEVERE EPISODE /30 PERCENT
EQUIVALENT/ IS NOT CURRENTLY EXPECTED GIVEN THAT THE REGION WILL
GENERALLY BE REMOVED FROM THE STRONGER WESTERLIES ALOFT...AND
OVERALL DESTABILIZATION COULD ALSO BE MARGINAL.

WHILE DETAILS ARE UNCERTAIN...ESPECIALLY REGARDING THE SOUTHERN
STREAM SYSTEM/S POTENTIAL EASTWARD ADVANCEMENT TOWARD THE
PLAINS...AT LEAST SOME SEVERE POTENTIAL COULD RETURN TO THE
SOUTH-CENTRAL CONUS...INCLUDING SOUTHERN PLAINS TO ARKLATEX/LOWER MS
VALLEY...BY AROUND DAYS 6/7 FRIDAY AND SATURDAY. AN EXTENSIVE
FRONTAL PENETRATION ACROSS THE GULF OF MEXICO DOES NOT APPEAR LIKELY
MID-WEEK...AND THUS MOISTURE SHOULD STEADILY RETURN NORTHWARD ACROSS
THE SOUTH-CENTRAL CONUS THROUGH DAYS 6-8 GIVEN THE EXPECTED OVERALL
PATTERN.

..GUYER.. 04/21/2013

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