MESO: Mesoscale Discussion 1435

ACUS11 KWNS 232219
SWOMCD
SPC MCD 232219
IAZ000-MOZ000-232345-

MESOSCALE DISCUSSION 1435
NWS STORM PREDICTION CENTER NORMAN OK
0519 PM CDT FRI JUL 23 2010

AREAS AFFECTED...NORTHERN MO/SOUTHERN IA

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 232219Z - 232345Z

SEVERE RISK APPEARS TO BE INCREASING ACROSS NORTHERN MO/SOUTHERN IA
THROUGH EARLY EVENING. WHILE THE EXTENT OF THE SEVERE RISK IS
SOMEWHAT QUESTIONABLE...A CONTINUANCE OF INCREASING DEEP CONVECTIVE
TRENDS COULD PROMPT A WATCH ISSUANCE.

VISIBLE SATELLITE IMAGERY INDICATES TOWERING CU ACROSS FAR
NORTH-CENTRAL MO...ALONG/SOUTH OF A ROUGHLY WEST-EAST ZONE OF
DIFFERENTIAL HEATING ACROSS CENTRAL/SOUTHERN IA. IT SEEMS PROBABLE
THAT ADDITIONAL/ISOLATED TO SCATTERED STORMS WILL CONTINUE TO
DEVELOP OVER THE NEXT SEVERAL HOURS WITHIN THIS CORRIDOR. ALTHOUGH
MID LEVEL TEMPERATURES ARE FAIRLY WARM /-5 TO -6C AT 500
MB/...CONSIDERABLE BOUNDARY LAYER MOISTURE/STRONG BUOYANCY WILL
SUPPORT STRONG UPDRAFT DEVELOPMENT. REGIONAL PROFILERS/WSR-88D
DERIVED WIND DATA APPEAR TO RESIDUALLY REFLECT ENHANCED MID LEVEL
WESTERLY FLOW ACROSS IA IN THE WAKE OF THE SUBTLE MID LEVEL IMPULSE
NOW ENTERING NORTHERN IL...AND WITH RELATIVELY STRONG LOW LEVEL
SOUTHWESTERLY FLOW/ADEQUATE VEERING...SOME SURFACE BASED SUPERCELLS
CAPABLE OF DAMAGING WINDS/PERHAPS A TORNADO WILL BE POSSIBLE.

..GUYER.. 07/23/2010

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

ATTN...WFO...LSX...DVN...DMX...EAX...OAX...

LAT...LON 40919493 41559298 41109141 39929195 40149436 40919493

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KCTP [232218]: Preliminary Local Storm Report

NWUS51 KCTP 232218
LSRCTP

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
618 PM EDT FRI JUL 23 2010

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

0426 PM TSTM WND DMG PENFIELD 41.21N 78.60W
07/23/2010 CLEARFIELD PA COUNTY OFFICIAL

911 CENTER REPORTED TREES DOWN.

0522 PM TSTM WND DMG 1 W BEECH CREEK 41.07N 77.61W
07/23/2010 CLINTON PA COUNTY OFFICIAL

911 CENTER REPORTED TREES DOWN ON MARSH CREEK ROAD IN
LIBERTY TOWNSHIP.

0528 PM TSTM WND DMG HOWARD 41.01N 77.66W
07/23/2010 CENTRE PA COUNTY OFFICIAL

911 CENTER REPORTED TREES AND WIRES DOWN FROM HOWARD TO
HUBLERSBURG.

&&

$$

MACH

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KLOT [232218]: Preliminary Local Storm Report

NWUS53 KLOT 232218
LSRLOT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
518 PM CDT FRI JUL 23 2010

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

0504 PM TSTM WND GST PERU 41.34N 89.13W
07/23/2010 M52 MPH LA SALLE IL AWOS

MEASURED GUST TO 52 MPH AT THE PERU AIRPORT.

0513 PM TSTM WND GST 1 N PERU 41.36N 89.13W
07/23/2010 E70 MPH LA SALLE IL TRAINED SPOTTER

ESTIMATED GUST TO 70 MPH ON ROUTE 251 ABOUT A HALF MILE
SOUTH OF INTERSTATE 80.

&&

$$

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KDVN [232216]: Preliminary Local Storm Report

NWUS53 KDVN 232216
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
516 PM CDT FRI JUL 23 2010

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

0514 PM TSTM WND DMG PRINCETON 41.38N 89.47W
07/23/2010 BUREAU IL EMERGENCY MNGR

NO POWER AT BUREAU COUNTY ESDA BUILDING...POWER LINES
DOWN IN PRINCETON

&&

$$

TG

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KDTX [232215]: Preliminary Local Storm Report

NWUS53 KDTX 232215
LSRDTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
615 PM EDT FRI JUL 23 2010

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

0612 PM TSTM WND GST 1 SE CHELSEA 42.30N 84.01W
07/23/2010 E60 MPH WASHTENAW MI TRAINED SPOTTER

&&

$$

WDEEDLER

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KGRR [232211]: Preliminary Local Storm Report

NWUS53 KGRR 232211
LSRGRR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
611 PM EDT FRI JUL 23 2010

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

0556 PM HAIL JACKSON 42.25N 84.41W
07/23/2010 M0.50 INCH JACKSON MI TRAINED SPOTTER

LOCATION OF US 127 AND I 94.

&&

$$

RSUTTLE

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KDVN [232211]: Preliminary Local Storm Report...corrected

NWUS53 KDVN 232211
LSRDVN

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
510 PM CDT FRI JUL 23 2010

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

0355 PM TSTM WND DMG DAVENPORT 41.56N 90.60W
07/23/2010 SCOTT IA TRAINED SPOTTER

TREE DOWN NEAR VANDER VEER PARK AND BRADY STREET BLOCKING
TRAFFIC...TIME ESTIMATED OFF RADAR.

0355 PM TSTM WND DMG 2 SSE DAVENPORT 41.56N 90.60W
07/23/2010 SCOTT IA TRAINED SPOTTER

10 INCH TREE LIMB DOWN NEAR 4TH AND BROWN STREET ALONG

WITH SEVERAL OTHER SMALL LIMBS. TIME ESTIMATED OFF RADAR.

&&

$$

LEGRO

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KDTX [232208]: Preliminary Local Storm Report

NWUS53 KDTX 232208
LSRDTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
608 PM EDT FRI JUL 23 2010

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

0604 PM TSTM WND GST CHELSEA 42.31N 84.02W
07/23/2010 E50.00 MPH WASHTENAW MI TRAINED SPOTTER

M-52 AND OLD US-12, ALSO PEA SIZE HAIL

&&

$$

WDEEDLER

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KDVN [232207]: Preliminary Local Storm Report

NWUS53 KDVN 232207
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
507 PM CDT FRI JUL 23 2010

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

0354 PM TSTM WND DMG 2 SSE DAVENPORT 41.53N 90.59W
07/23/2010 SCOTT IA TRAINED SPOTTER

SMALL TENT DAMAGE AT BIX FEST ON THE RIVERFRONT AS WELL
AS TABLES OVERTURNED AT THE STREET FEST ON 2ND STREET.

&&

$$

TG

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KGRR [232206]: Preliminary Local Storm Report

NWUS53 KGRR 232206
LSRGRR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
605 PM EDT FRI JUL 23 2010

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

0600 PM TSTM WND DMG 1 NW JACKSON 42.26N 84.42W
07/23/2010 JACKSON MI TRAINED SPOTTER

TREE WITH WIRES DOWN BLOCKING NW AVE NEAR NORTH STREET

&&

$$

CSCHOLTEN

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KDVN [232205]: Preliminary Local Storm Report...corrected

NWUS53 KDVN 232205
LSRDVN

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
505 PM CDT FRI JUL 23 2010

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

0342 PM TSTM WND DMG DAVENPORT 41.56N 90.60W
07/23/2010 SCOTT IA TRAINED SPOTTER

TREE DOWN NEAR VANDER VEER PARK AND BRADY STREET BLOCKING
TRAFFIC...TIME ESTIMATED.

&&

$$

LEGRO

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KDVN [232202]: Preliminary Local Storm Report

NWUS53 KDVN 232202
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
502 PM CDT FRI JUL 23 2010

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

0442 PM TSTM WND DMG DAVENPORT 41.56N 90.60W
07/23/2010 SCOTT IA TRAINED SPOTTER

TREE DOWN NEAR VANDER VEER PARK AND BRADY STREET BLOCKING
TRAFFIC...TIME ESTIMATED.

&&

$$

TG

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KDVN [232202]: Preliminary Local Storm Report

NWUS53 KDVN 232202
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
502 PM CDT FRI JUL 23 2010

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

0501 PM TSTM WND GST 1 S LA MOILLE 41.52N 89.28W
07/23/2010 E70 MPH BUREAU IL TRAINED SPOTTER

ESTIMATED 60 TO 70MPH GUSTS.

&&

$$

LEGRO

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KDVN [232200]: Preliminary Local Storm Report

NWUS53 KDVN 232200
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
459 PM CDT FRI JUL 23 2010

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

0330 PM TSTM WND DMG MUSCATINE 41.42N 91.07W
07/23/2010 MUSCATINE IA TRAINED SPOTTER

LARGE BRANCH DOWN AT THE COURTHOUSE.

&&

$$

LEGRO

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WATCHES: Tornado Watch Number 525

WWUS20 KWNS 232157
SEL5
SPC WW 232157
CTZ000-NJZ000-NYZ000-PAZ000-CWZ000-240500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 525
NWS STORM PREDICTION CENTER NORMAN OK
555 PM EDT FRI JUL 23 2010

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

SOUTHWEST CONNECTICUT
NORTHERN NEW JERSEY
SOUTHEAST NEW YORK
FAR NORTHEAST PENNSYLVANIA
COASTAL WATERS

EFFECTIVE THIS FRIDAY AFTERNOON AND SATURDAY MORNING FROM 555 PM
UNTIL 100 AM EDT.

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 45 STATUTE
MILES EITHER SIDE OF A LINE FROM 30 MILES NORTH NORTHWEST OF
WILKESBARRE PENNSYLVANIA TO 25 MILES EAST OF NEW YORK CITY NEW
YORK. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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.

OTHER WATCH INFORMATION...CONTINUE...WW 521...WW 522...WW
523...WW 524...

DISCUSSION...CLUSTER OF TSTMS /INCLUDING SUPERCELLS/ OVER NERN PA IS
EXPECTED TO PROGRESS SEWD ALONG WARM FRONT RETREATING NWD THROUGH
NRN NJ INTO SERN NY. AIR MASS ALONG AND S OF THIS BOUNDARY IS HOT
AND QUITE MOIST WITH MLCAPE OF 1000-2000 J/KG. AREA VWPS INDICATE
MODERATELY STRONG LOW AND DEEP-LAYER SHEAR PRESENT INVOF OF THE WARM
FRONT...SUGGESTING THAT ENVIRONMENT WILL REMAIN SUPPORTIVE OF
ROTATING UPDRAFTS THROUGH THE REMAINDER OF THE EVENING. WHILE
LOCALLY DAMAGING WIND GUSTS WILL BE THE PRIMARY HAZARD...THE
POTENTIAL FOR A FEW TORNADOES WILL EXIST WITH ANY STORMS THAT CAN
FAVORABLY INTERACT WITH THE LOW-LEVEL BAROCLINIC ZONE.

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 30035.

...MEAD

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KDVN [232158]: Preliminary Local Storm Report

NWUS53 KDVN 232158
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
458 PM CDT FRI JUL 23 2010

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

0453 PM TSTM WND GST PRINCETON 41.38N 89.47W
07/23/2010 E65 MPH BUREAU IL TRAINED SPOTTER

0453 PM TSTM WND DMG PRINCETON 41.38N 89.47W
07/23/2010 BUREAU IL TRAINED SPOTTER

TREE AND POWER POLE DOWN IN TOWN.

&&

$$

LEGRO

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KPBZ [232158]: Preliminary Local Storm Report

NWUS51 KPBZ 232158
LSRPBZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
558 PM EDT FRI JUL 23 2010

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

0525 PM TSTM WND DMG 3 ENE OIL CITY 41.44N 79.65W
07/23/2010 VENANGO PA COUNTY OFFICIAL

FEW TREES DOWN

&&

$$

15

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KDTX [232157]: Preliminary Local Storm Report

NWUS53 KDTX 232157
LSRDTX

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
557 PM EDT FRI JUL 23 2010

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

0552 PM HAIL 2 W HUDSON MILLS 42.39N 83.96W
07/23/2010 M0.75 INCH WASHTENAW MI LAW ENFORCEMENT

&&

$$

WDEEDLER

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KGRR [232157]: Preliminary Local Storm Report

NWUS53 KGRR 232157
LSRGRR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
557 PM EDT FRI JUL 23 2010

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

0556 PM HEAVY RAIN GALESBURG 42.29N 85.42W
07/23/2010 M1.50 INCH KALAMAZOO MI TRAINED SPOTTER

SINCE MIDNIGHT.

&&

$$

RSUTTLE

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KDVN [232154]: Preliminary Local Storm Report

NWUS53 KDVN 232154
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
454 PM CDT FRI JUL 23 2010

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

0425 PM TSTM WND GST 3 SE ANNAWAN 41.37N 89.87W
07/23/2010 E60.00 MPH HENRY IL TRAINED SPOTTER

TIME ESTIMATED FROM RADAR.

&&

$$

LEGRO

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KDVN [232154]: Preliminary Local Storm Report

NWUS53 KDVN 232154
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
453 PM CDT FRI JUL 23 2010

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

0442 PM TSTM WND GST WNW TISKILWA 41.30N 89.52W
07/23/2010 E60 MPH BUREAU IL TRAINED SPOTTER

ESTIMATED WIND GUST JUST WEST OF TISKILWA.

&&

$$

TG

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KGRR [232153]: Preliminary Local Storm Report

NWUS53 KGRR 232153
LSRGRR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
553 PM EDT FRI JUL 23 2010

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

0549 PM HEAVY RAIN 3 E BATTLE CREEK 42.32N 85.14W
07/23/2010 M1.99 INCH CALHOUN MI EMERGENCY MNGR

TOTAL SINCE MIDNIGHT

&&

$$

CSCHOLTEN

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KFGZ [232151]: Preliminary Local Storm Report

NWUS55 KFGZ 232151
LSRFGZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
251 PM MST FRI JUL 23 2010

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

0241 PM HEAVY RAIN 1 E PINETOP-LAKESIDE 34.15N 109.95W
07/23/2010 M1.00 INCH NAVAJO AZ PUBLIC

&&

EVENT NUMBER FGZ1000132

$$

LCR

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KDVN [232150]: Preliminary Local Storm Report

NWUS53 KDVN 232150
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
450 PM CDT FRI JUL 23 2010

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

0445 PM TSTM WND GST 1 S WYANET 41.35N 89.58W
07/23/2010 E65 MPH BUREAU IL TRAINED SPOTTER

ESTIMATED 60 TO 65MPH WIND GUSTS.

&&

$$

LEGRO

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KMOB [232149]: Preliminary Local Storm Report

NWUS54 KMOB 232149
LSRMOB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
449 PM CDT FRI JUL 23 2010

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

0345 PM TORNADO PENSACOLA 30.42N 87.19W
07/23/2010 ESCAMBIA FL PUBLIC

WIND BLEW DOWN A TREE INTO A HOUSE, CUTTING IT IN HALF.
ADDRESS 92 GARFIELD DRIVE. PUBLICC SAW FUNNEL CLOUD.
KENNETH LAMB OF WEBY RADIO RELAYED REPORT.

&&

$$

BD

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KDVN [232144]: Preliminary Local Storm Report

NWUS53 KDVN 232144
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
444 PM CDT FRI JUL 23 2010

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

0418 PM TSTM WND DMG GENESEO 41.45N 90.15W
07/23/2010 HENRY IL PUBLIC

SEVERAL TREES AND LARGE BRANCHES DOWN IN GENESEO...TIME
ESTIMATED.

&&

$$

TG

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KMOB [232143]: Preliminary Local Storm Report

NWUS54 KMOB 232143
LSRMOB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
443 PM CDT FRI JUL 23 2010

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

&&

$$

BD

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KGRR [232142]: Preliminary Local Storm Report

NWUS53 KGRR 232142
LSRGRR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
542 PM EDT FRI JUL 23 2010

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

0530 PM HEAVY RAIN COMSTOCK 42.29N 85.51W
07/23/2010 M1.30 INCH KALAMAZOO MI TRAINED SPOTTER

1 HOUR RAINFALL.

&&

$$

RSUTTLE

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MESO: Mesoscale Discussion 1434

ACUS11 KWNS 232137
SWOMCD
SPC MCD 232136
CTZ000-NYZ000-NJZ000-PAZ000-232230-

MESOSCALE DISCUSSION 1434
NWS STORM PREDICTION CENTER NORMAN OK
0436 PM CDT FRI JUL 23 2010

AREAS AFFECTED...LOWER HUDSON VALLEY / NYC METRO

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 521...

VALID 232136Z - 232230Z

SEVERE POTENTIAL IS INCREASING ACROSS THE LOWER HUDSON RIVER VALLEY
AND INTO THE NYC MEGALOPOLIS. MAIN THREATS WILL LIKELY BE DMGG
WINDS BUT AN ISOLD TORNADO IS POSSIBLE...A WW WILL LIKELY BE NEEDED
WITHIN THE HOUR.

RECENT SURFACE ANALYSIS PLACES A WARM FRONTAL ZONE EXTENDING FROM
LONG ISLAND WNWWD TOWARDS NERN PA. THE AIRMASS S OF THIS BOUNDARY
IS CHARACTERIZED AS VERY MOIST/UNSTABLE. RADAR MOSAIC IMAGERY OVER
THE PAST 30 MINUTES SHOWS A DEVELOPING SUPERCELL OVER SUSQUEHANNA
COUNTY PA AND THIS WILL LIKELY MOVE SEWD ALONG THE INSTABILITY
GRADIENT. RELATIVELY BACKED SLY LOW LEVEL FLOW VEERING TO STRONG
WNWLY MID LEVEL FLOW IS CONTRIBUTING TO SUBSTANTIAL LOW LEVEL SHEAR
/IN EXCESS OF 300 M2/S2 0-1 KM SRH/. AS SUCH...A WW WILL LIKELY BE
NEEDED WITHIN THE HOUR TO ACCOUNT FOR A DMGG WIND THREAT AND
INCREASING TORNADO POTENTIAL.

..SMITH.. 07/23/2010

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

ATTN...WFO...BOX...OKX...ALY...PHI...BGM...

LAT...LON 41937447 41987351 41477199 41017187 40717278 40407403
40767498 40977505 41937447

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KDVN [232134]: Preliminary Local Storm Report

NWUS53 KDVN 232134
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
433 PM CDT FRI JUL 23 2010

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

0433 PM TSTM WND DMG DAVENPORT 41.56N 90.60W
07/23/2010 SCOTT IA TRAINED SPOTTER

10 INCH TREE LIMB DOWN NEAR 4TH AND BROWN STREET ALONG
WITH SEVERAL OTHER SMALL LIMBS.

&&

$$

TG

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WATCHES: Severe Thunderstorm Watch Number 524

WWUS20 KWNS 232126
SEL4
SPC WW 232126
INZ000-MIZ000-OHZ000-LEZ000-LMZ000-240500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 524
NWS STORM PREDICTION CENTER NORMAN OK
525 PM EDT FRI JUL 23 2010

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

NORTHERN INDIANA
SOUTHERN LOWER MICHIGAN
FAR NORTHWEST OHIO
LAKE ERIE
LAKE MICHIGAN

EFFECTIVE THIS FRIDAY AFTERNOON AND SATURDAY MORNING FROM 525 PM
UNTIL 100 AM EDT.

HAIL TO 1.5 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 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTHWEST
OF BENTON HARBOR MICHIGAN TO 15 MILES EAST NORTHEAST OF DETROIT
MICHIGAN. 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 521...WW 522...WW 523...

DISCUSSION...TSTMS HAVE RAPIDLY DEVELOPED THIS EVENING ALONG A W-E
ORIENTED LOW-LEVEL BAROCLINIC ZONE IN PLACE ACROSS SRN LOWER MI.
AMBIENT AIR MASS IS HOT AND QUITE MOIST WITH MLCAPE OF 2500-3500
J/KG. MOREOVER...AREA VWPS INDICATE A BELT OF STRONG WLY FLOW /I.E.
35-50 KT/ IN THE 1-3 KM AGL LAYER WHICH IS RESULTING IN A STRONGLY
SHEARED KINEMATIC ENVIRONMENT. AS SUCH...THE POTENTIAL WILL EXIST
FOR SPLITTING SUPERCELLS AND/OR BOWING LINE SEGMENTS WITH THE
PRIMARY THREAT BEING DAMAGING WIND GUSTS.
AN ADDITIONAL CONVECTIVE SYSTEM CURRENTLY EVOLVING OVER ERN IA/NWRN
IL WILL RAPIDLY PROGRESS EWD INTO NRN IND LATER THIS EVENING. HERE
TOO...ENVIRONMENT WILL FAVOR DAMAGING WIND GUSTS ALONG MCS TRACK.

AVIATION...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 550. MEAN STORM
MOTION VECTOR 27035.

...MEAD

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KGRR [232127]: Preliminary Local Storm Report

NWUS53 KGRR 232127
LSRGRR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
526 PM EDT FRI JUL 23 2010

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

0518 PM FLOOD BATTLE CREEK 42.32N 85.19W
07/23/2010 CALHOUN MI EMERGENCY MNGR

A FEW ROADS IN THE BATTLE CREEK AREA ARE BEGINNING TO
FLOOD.

0519 PM FLOOD 3 NW KALAMAZOO 42.31N 85.63W
07/23/2010 KALAMAZOO MI AMATEUR RADIO

RAVINE ROAD NEAR NICHOLS ROAD BEGINNING TO FLOOD

0519 PM FLOOD 5 WNW KALAMAZOO 42.32N 85.68W
07/23/2010 KALAMAZOO MI AMATEUR RADIO

6500 BLOCK OF H AVE BEGINNING TO FLOOD

&&

$$

CSCHOLTEN

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KDVN [232126]: Preliminary Local Storm Report

NWUS53 KDVN 232126
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
426 PM CDT FRI JUL 23 2010

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

0421 PM HEAVY RAIN STOCKTON 42.35N 90.01W
07/23/2010 M7.84 INCH JO DAVIESS IL CO-OP OBSERVER

UPDATED 24 HOUR TOTAL FROM 7AM THURSDAY 7/22 TO 7AM
FRIDAY 7/23.

&&

$$

LEGRO

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KDVN [232116]: Preliminary Local Storm Report...corrected

NWUS53 KDVN 232116
LSRDVN

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
416 PM CDT FRI JUL 23 2010

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

0416 PM TSTM WND GST COLONA 41.49N 90.35W
07/23/2010 E65.00 MPH HENRY IL TRAINED SPOTTER

WIND GUST ESTIMATE AT HOME IN COLONA.

&&

$$

TG

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KDVN [232116]: Preliminary Local Storm Report

NWUS53 KDVN 232116
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
415 PM CDT FRI JUL 23 2010

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

0336 PM TSTM WND GST COLONA 41.49N 90.35W
07/23/2010 E65 MPH HENRY IL TRAINED SPOTTER

WIND GUST ESTIMATE AT HOME IN COLONA.

&&

$$

TG

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KMKX [232111]: Preliminary Local Storm Report...corrected

NWUS53 KMKX 232111
LSRMKX

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
411 PM CDT FRI JUL 23 2010

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

0702 PM TORNADO 1 S BIG BEND 42.87N 88.20W
07/22/2010 F2 WAUKESHA WI NWS STORM SURVEY

EF2 TORNADO. TRACK 1 S OF BIG BEND TO 1.2 SE OF BIG BEND.
1 MILE PATH LENGTH. DESTROYED GARAGE AND POLL SHED. MOVED
CAMPING TRAILER 50 YARDS. 115-120MPH WIND. 602 PM TO 605
PM.

&&

$$

PZABEL

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KDVN [232102]: Preliminary Local Storm Report

NWUS53 KDVN 232102
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
402 PM CDT FRI JUL 23 2010

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

0357 PM TSTM WND GST MOLINE QUAD-CITY AIRPOR 41.45N 90.50W
07/23/2010 M59 MPH ROCK ISLAND IL ASOS

&&

$$

LEGRO

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KMOB [232059]: Preliminary Local Storm Report

NWUS54 KMOB 232059
LSRMOB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
359 PM CDT FRI JUL 23 2010

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

0356 PM TSTM WND DMG 5 S CRESTVIEW 30.69N 86.57W
07/23/2010 OKALOOSA FL EMERGENCY MNGR

PARTIAL ROOF DAMAGE, SWING SET DAMAGE, SCATTERED DEBRIS.

&&

$$

GENEJ

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MESO: Mesoscale Discussion 1433

ACUS11 KWNS 232059
SWOMCD
SPC MCD 232058
MIZ000-OHZ000-INZ000-232230-

MESOSCALE DISCUSSION 1433
NWS STORM PREDICTION CENTER NORMAN OK
0358 PM CDT FRI JUL 23 2010

AREAS AFFECTED...SRN LWR MI

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 232058Z - 232230Z

THUNDERSTORMS ARE DEVELOPING RAPIDLY OVER SWRN LOWER MI. IF STORMS
CONTINUE TO DEVELOP AND INTENSIFY...WW WILL BE NEEDED.

CONVECTION IS FORMING ON SUBTLE EAST-WEST CONFLUENT AXIS ACROSS SRN
LOWER MI. AIR MASS OVER THIS AREA IS WARM/MOIST WITH SURFACE
TEMPERATURE INTO THE LOW 90S WITH DEW POINTS IN THE MID
70S...CONTRIBUTING TO UNSTABLE CONDITIONS WITH MLCAPE OF 2000-3000
J/KG. AREA VAD DATA SHOW UNIDIRECTIONAL WESTERLY WINDS OF 35-45 KT
ABOVE 2-3 KM WHICH IS PROVIDING FAVORABLE LOW LEVEL SHEAR SUPPORTIVE
OF SMALL BOWING STORMS WITH WIND DAMAGE POTENTIAL. IF CURRENT
TRENDS CONTINUE A NEW WW MAY BE NEEDED WITHIN THE NEXT HOUR.

..WEISS.. 07/23/2010

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

ATTN...WFO...CLE...DTX...IWX...GRR...

LAT...LON 42698590 42858442 42718263 42178290 41658348 41708516
41628664 42518627 42698590

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KDVN [232058]: Preliminary Local Storm Report

NWUS53 KDVN 232058
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
358 PM CDT FRI JUL 23 2010

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

0356 PM TSTM WND GST 1 WSW DAVENPORT 41.55N 90.62W
07/23/2010 E70 MPH SCOTT IA TRAINED SPOTTER

ESTIMATED 65 TO 70MPH GUSTS.

&&

$$

LEGRO

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WATCHES: Tornado Watch Number 523

WWUS20 KWNS 232044
SEL3
SPC WW 232044
SDZ000-240300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 523
NWS STORM PREDICTION CENTER NORMAN OK
345 PM CDT FRI JUL 23 2010

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

PARTS OF CENTRAL AND SOUTHERN SOUTH DAKOTA

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 345 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST SOUTHWEST OF
PIERRE SOUTH DAKOTA TO 35 MILES EAST OF MITCHELL SOUTH DAKOTA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).

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.

OTHER WATCH INFORMATION...CONTINUE...WW 521...WW 522...

DISCUSSION...WITH A VERY UNSTABLE AIR MASS NOW IN PLACE ACROSS SRN
SD AHEAD OF APPROACHING COLD FRONT...THUNDERSTORMS EXPECTED TO
DEVELOP RAPIDLY IN WRN PORTION OF WATCH. WITH VEERING SHEAR
PROFILES VICINITY E/W WARM FRONT THRU THE WATCH AND APPROACHING
UPPER TROUGH FROM MT...SUPERCELLS ARE LIKELY INCLUDING VERY LARGE
HAIL AND A TORNADO THREAT. STORMS WILL THEN MOVE SLOWLY E/SE ACROSS
WATCH ALONG FAVORABLE INSTABILITY/MOISTURE AXIS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 28020.

...HALES

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KDVN [232038]: Preliminary Local Storm Report

NWUS53 KDVN 232038
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
338 PM CDT FRI JUL 23 2010

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

0336 PM TSTM WND DMG GRANDVIEW 41.28N 91.19W
07/23/2010 LOUISA IA TRAINED SPOTTER

ESTIMATED 3 FOOT DIAMETER TREE DOWN IN GRANDVIEW...POWER
IS OUT IN TOWN AS WELL.

&&

$$

TG

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KDVN [232036]: Preliminary Local Storm Report

NWUS53 KDVN 232036
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
336 PM CDT FRI JUL 23 2010

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

0335 PM TSTM WND GST 4 SE MUSCATINE 41.37N 91.02W
07/23/2010 E60 MPH ROCK ISLAND IL TRAINED SPOTTER

ESTIMATED 50 TO 60MPH GUSTS AND HEAVY RAINFALL.

&&

$$

LEGRO

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KDVN [232036]: Preliminary Local Storm Report

NWUS53 KDVN 232036
LSRDVN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
336 PM CDT FRI JUL 23 2010

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

0336 PM HEAVY RAIN 2 NNE MUSCATINE 41.44N 91.05W
07/23/2010 M0.94 INCH MUSCATINE IA TRAINED SPOTTER

RAINFALL AMOUNT IN THE PAST 20 MINUTES.

&&

$$

TG

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KLBF [232036]: Preliminary Local Storm Report

NWUS53 KLBF 232036
LSRLBF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
335 PM CDT FRI JUL 23 2010

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

0745 PM TSTM WND GST RUSHVILLE 42.71N 102.47W
07/22/2010 E80.00 MPH SHERIDAN NE LAW ENFORCEMENT

A WET MICROBURST OCCURRED. VISIBILITY WAS LESS THAN 100
YARDS IN VERY HEAVY RAIN AND HIGH WINDS. LARGE DUMPSTERS
WERE FLIPPED. NUMEROUS POWERLINES WERE DOWN IN THE CENTER
OF TOWN. A SECTION OF THE ROOF OF THE 1ST INVESTMENT
CENTER BLDG LIFTED OFF AND LANDED ON ANOTHER BLDG NEARBY.
2.5 INCHES OF RAIN WAS MEASURED. 5 HOMES WERE FLOODED AND
SEVERAL ROADS IN TOWN WERE FLOODED CURB TO CURB.

&&

$$

CDC

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KMKX [232034]: Preliminary Local Storm Report...corrected

NWUS53 KMKX 232034
LSRMKX

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
334 PM CDT FRI JUL 23 2010

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

0615 PM TORNADO 6 SW FORT ATKINSON 42.87N 88.93W
07/22/2010 F0 JEFFERSON WI NWS STORM SURVEY

EF0 TORNADO. TRACK FROM 6.6 SW TO 5.3 S OF FORT ATKINSON.
65-70MPH WINDS. MOSTLY TREE LIMB DAMAGE.

0626 PM TORNADO 6 SE FORT ATKINSON 42.87N 88.76W
07/22/2010 F0 JEFFERSON WI NWS STORM SURVEY

EF0 TORNADO. TRACK 2.7 SW OF COLD SPRING TO 3.6 SE OF
COLD SPRING. 4MI LENGTH. 65-70 MPH. MOSTLY TREE LIMB
DAMAGE. 626PM TO 634PM.

0709 PM TORNADO 1 S BIG BEND 42.87N 88.20W
07/22/2010 F2 WAUKESHA WI NWS STORM SURVEY

EF2 TORNADO. TRACK 1 S OF BIG BEND TO 1.2 SE OF BIG BEND.
1 MILE PATH LENGTH. DESTROYED GARAGE AND POLL SHED. MOVED
CAMPING TRAILER 50 YARDS. 115-120MPH WIND

&&

$$

PZABEL

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KVEF [232018]: Preliminary Local Storm Report

NWUS55 KVEF 232018
LSRVEF

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAS VEGAS NV
117 PM PDT FRI JUL 23 2010

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

0102 PM HEAVY RAIN 28 E KINGMAN 35.21N 113.54W
07/23/2010 M1.10 INCH MOHAVE AZ MESONET

THE TIN MOUNTAIN MOHAVE COUNTY ALERT FLOOD WARNING SYSTEM
GAGE REPORTED 1.10 INCHES IN 30 MINUTES ENDING AT 1302
MST.

&&

$$

BFUIS

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KALY [232010]: Preliminary Local Storm Report...summary

NWUS51 KALY 232010
LSRALY

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ALBANY NY
408 PM EDT FRI JUL 23 2010

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

0154 PM TSTM WND DMG PITTSTOWN 42.84N 73.48W
07/21/2010 RENSSELAER NY EMERGENCY MNGR

TREES DOWN ON COOKS BURO RD. POWER OUTAGES ALSO REPORTED.

0225 PM HAIL WILLIAMSTOWN 42.71N 73.20W
07/21/2010 E0.50 INCH BERKSHIRE MA TRAINED SPOTTER

0229 PM TSTM WND GST NORTH ADAMS 42.69N 73.11W
07/21/2010 M43.00 MPH BERKSHIRE MA ASOS

0230 PM HAIL NORTH ADAMS 42.69N 73.11W
07/21/2010 E0.25 INCH BERKSHIRE MA TRAINED SPOTTER

0230 PM LIGHTNING NORTH ADAMS 42.69N 73.11W
07/21/2010 BERKSHIRE MA TRAINED SPOTTER

CORNER OF LIBERTY STREET AND ORCHARD STREET TRANSFORMER
HIT BY LIGHTNING.

0230 PM HAIL NORTH ADAMS 42.69N 73.11W
07/21/2010 E0.25 INCH BERKSHIRE MA DEPT OF HIGHWAYS

0300 PM HAIL SHARON 41.88N 73.47W
07/21/2010 E0.50 INCH LITCHFIELD CT PUBLIC

0305 PM HAIL SHARON 41.88N 73.47W
07/21/2010 E1.00 INCH LITCHFIELD CT PUBLIC

0305 PM TSTM WND DMG NORTH ADAMS 42.69N 73.11W
07/21/2010 BERKSHIRE MA TRAINED SPOTTER

LARGE TREE DOWN ON HOUSE.

0305 PM TSTM WND DMG SHARON 41.88N 73.47W
07/21/2010 LITCHFIELD CT NWS STORM SURVEY

NUMEROUS TREES AND WIRES DOWN. ESTIMATED MAXIMUM WIND
SPEEDS AT 90 MPH.

0306 PM TSTM WND DMG MILLERTON 41.95N 73.51W
07/21/2010 DUTCHESS NY LAW ENFORCEMENT

TREES AND WIRES DOWN.

0306 PM TSTM WND DMG AMENIA 41.85N 73.55W
07/21/2010 DUTCHESS NY LAW ENFORCEMENT

MULTIPLE TREES DOWN. TREES DOWN ON VEHICLES.

0308 PM HAIL SHARON 41.88N 73.47W
07/21/2010 E0.88 INCH LITCHFIELD CT TRAINED SPOTTER

0313 PM HAIL SHARON 41.88N 73.47W
07/21/2010 E0.50 INCH LITCHFIELD CT PUBLIC

0317 PM TSTM WND DMG 2 SW WEST CORNWALL 41.85N 73.39W
07/21/2010 LITCHFIELD CT NWS STORM SURVEY

TREES AND WIRES DOWN ALONG W. CORNWALL RD.

0320 PM TSTM WND DMG CORNWALL 41.84N 73.33W
07/21/2010 LITCHFIELD CT TRAINED SPOTTER

LARGE TREE DOWN ON RTE 7

0326 PM TSTM WND DMG WEST GOSHEN 41.83N 73.25W
07/21/2010 LITCHFIELD CT NWS STORM SURVEY

TREES DOWN ALONG ROUTE 4.

0330 PM HAIL EAST CORNWALL 41.81N 73.31W
07/21/2010 E0.50 INCH LITCHFIELD CT PUBLIC

0344 PM HAIL LITCHFIELD 41.74N 73.19W
07/21/2010 E1.75 INCH LITCHFIELD CT PUBLIC

HAIL RANGING FROM HALF INCH TO 1.75 INCHES REPORTED
THROUGHOUT TOWN OF LITCHFIELD.

0344 PM TSTM WND DMG ACCORD 41.79N 74.23W
07/21/2010 ULSTER NY FIRE DEPT/RESCUE

TREES ON WIRES.

0344 PM LIGHTNING ACCORD 41.79N 74.23W
07/21/2010 ULSTER NY FIRE DEPT/RESCUE

HOUSE HIT BY LIGHTNING.

0344 PM HAIL TORRINGTON 41.83N 73.13W
07/21/2010 E1.00 INCH LITCHFIELD CT PUBLIC

HAIL RANGING FROM HALF INCH TO ONE INCH REPORTED IN TOWN
OF TORRINGTON.

0345 PM FUNNEL CLOUD LITCHFIELD 41.74N 73.19W
07/21/2010 LITCHFIELD CT PUBLIC

REPORTED BY PUBLIC FROM VILLAGE GREEN.

0349 PM TSTM WND DMG CORNWALL 41.84N 73.33W
07/21/2010 LITCHFIELD CT TRAINED SPOTTER

MULTIPLE TREES DOWN.

0350 PM TSTM WND DMG EAST LITCHFIELD 41.76N 73.12W
07/21/2010 LITCHFIELD CT FIRE DEPT/RESCUE

WIRES DOWN ON CAR

0350 PM HAIL LITCHFIELD 41.74N 73.19W
07/21/2010 E1.75 INCH LITCHFIELD CT TRAINED SPOTTER

QUARTER AND GOLF BALL SIZE HAIL

0350 PM HAIL TORRINGTON 41.83N 73.13W
07/21/2010 E0.88 INCH LITCHFIELD CT TRAINED SPOTTER

ON CRESTWOOD RD.

0350 PM HAIL TORRINGTON 41.83N 73.13W
07/21/2010 E1.00 INCH LITCHFIELD CT TRAINED SPOTTER

0351 PM TORNADO EAST LITCHFIELD 41.76N 73.12W
07/21/2010 F1 LITCHFIELD CT NWS STORM SURVEY

DAMAGE IN LINE ACROSS E. LITCHFIELD RD AND E. LITCHFIELD
RD SOUTH.

0351 PM HAIL EAST LITCHFIELD 41.76N 73.12W
07/21/2010 E1.75 INCH LITCHFIELD CT PUBLIC

0352 PM TSTM WND DMG LITCHFIELD 41.74N 73.19W
07/21/2010 LITCHFIELD CT TRAINED SPOTTER

TREES DOWN ON ROUTE 63 HEADING TOWARDS MORRIS.

0355 PM TORNADO 2 N THOMASTON 41.70N 73.07W
07/21/2010 F1 LITCHFIELD CT NWS STORM SURVEY

BRIEF TOUCHDOWN JUST WEST OF FENN RD.

0358 PM HAIL TORRINGTON 41.83N 73.13W
07/21/2010 E0.75 INCH LITCHFIELD CT TRAINED SPOTTER

OAK AVENUE

0358 PM HAIL HARWINTON 41.77N 73.06W
07/21/2010 E0.75 INCH LITCHFIELD CT TRAINED SPOTTER

WIND GUST ESTIMATED AT 40MPH OR MORE

0358 PM TORNADO THOMASTON 41.68N 73.08W
07/21/2010 F1 LITCHFIELD CT NWS STORM SURVEY

BRIEF TOUCHDOWN ON D. WELTON WAY.

0400 PM HAIL HARWINTON 41.77N 73.06W
07/21/2010 E0.88 INCH LITCHFIELD CT TRAINED SPOTTER

0405 PM TORNADO TERRYVILLE 41.68N 73.01W
07/21/2010 F1 LITCHFIELD CT NWS STORM SURVEY

BRIEF TOUCHDOWNS ALONG PROSPECT STREET AND US ROUTE 6 IN
TERRYVILLE. DAMAGED GAS STATION AWNING ON ROUTE 6.

0405 PM TSTM WND DMG THOMASTON 41.67N 73.07W
07/21/2010 LITCHFIELD CT FIRE DEPT/RESCUE

TREES AND WIRES DOWN. WIRES DOWN ON CARS. FIRES WERE
REPORTED.

0407 PM TSTM WND DMG THOMASTON 41.67N 73.07W
07/21/2010 LITCHFIELD CT PUBLIC

TREES AND WIRES DOWN.

0427 PM TSTM WND DMG 4 ENE POUGHKEEPSIE 41.71N 73.85W
07/21/2010 DUTCHESS NY PUBLIC

LARGE BRANCHES DOWN. TREE AND WIRES DOWN ON SLEIGHT-PLASS
ROAD.

0433 PM TSTM WND DMG LAGRANGEVILLE 41.65N 73.76W
07/21/2010 DUTCHESS NY LAW ENFORCEMENT

TREES AND WIRES DOWN.

0440 PM TSTM WND DMG DOVER PLAINS 41.75N 73.58W
07/21/2010 DUTCHESS NY EMERGENCY MNGR

MANY TREES AND WIRES DOWN.

0613 PM TSTM WND DMG 5 ESE MCKEEVER 43.57N 75.01W
07/21/2010 HERKIMER NY LAW ENFORCEMENT

TREES AND WIRES DOWN.

0645 PM TSTM WND DMG SPECULATOR 43.58N 74.38W
07/21/2010 HAMILTON NY POST OFFICE

TREE DOWN.

0654 PM TSTM WND DMG POTTERSVILLE 43.73N 73.82W
07/21/2010 WARREN NY LAW ENFORCEMENT

TREE DOWN ON ROUTE 9.

0800 PM TSTM WND DMG OHIO 43.32N 74.98W
07/21/2010 HERKIMER NY LAW ENFORCEMENT

TREES AND WIRES DOWN.

0810 PM TSTM WND DMG OHIO 43.32N 74.98W
07/21/2010 HERKIMER NY TRAINED SPOTTER

TREES AND WIRES DOWN AND A BROKEN POWER POLE ALONG STATE
ROUTE 8.

0810 PM HAIL NEWPORT 43.19N 75.01W
07/21/2010 E1.25 INCH HERKIMER NY PUBLIC

0815 PM TSTM WND DMG SCHUYLER CORNERS 42.90N 75.00W
07/21/2010 HERKIMER NY LAW ENFORCEMENT

TREES AND WIRES DOWN.

0825 PM TSTM WND DMG HERKIMER 43.03N 74.99W
07/21/2010 HERKIMER NY LAW ENFORCEMENT

TREES AND WIRES DOWN.

0840 PM TSTM WND DMG OPPENHEIM 43.07N 74.69W
07/21/2010 FULTON NY LAW ENFORCEMENT

TREE DOWN.

0909 PM TSTM WND DMG 4 SE GALWAY 42.98N 73.98W
07/21/2010 SARATOGA NY LAW ENFORCEMENT

TREES DOWN.

0916 PM TSTM WND DMG BALLSTON SPA 43.01N 73.85W
07/21/2010 SARATOGA NY PUBLIC

NINE LARGE TREE LIMBS DOWN. ESTIMATED GUSTS 55 TO 60 MPH.

0917 PM TSTM WND DMG 5 SW SARATOGA SPRINGS 43.01N 73.84W
07/21/2010 SARATOGA NY LAW ENFORCEMENT

TREES DOWN ON EAST GROVE STREET.

0918 PM TSTM WND DMG SE BURNT HILLS 42.91N 73.90W
07/21/2010 SARATOGA NY LAW ENFORCEMENT

TREES DOWN ON LAKE HILL ROAD.

0918 PM TSTM WND DMG BALLSTON LAKE 42.91N 73.87W
07/21/2010 SARATOGA NY LAW ENFORCEMENT

TREES DOWN ON ASHDOWN ROAD.

0932 PM HAIL PITTSFIELD 42.45N 73.26W
07/21/2010 E0.88 INCH BERKSHIRE MA AMATEUR RADIO

DIME TO NICKEL SIZE HAIL REPORTED.

0955 PM HAIL BENNINGTON 42.87N 73.19W
07/21/2010 E1.00 INCH BENNINGTON VT PUBLIC

&&

$$

KLIPTON

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DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 232002
SWODY1
SPC AC 232000

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0300 PM CDT FRI JUL 23 2010

VALID 232000Z - 241200Z

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE NRN/CNTRL PLNS TO THE
MIDWEST/LOWER GREAT LAKES/NORTHEAST STATES...

...NORTHERN/CENTRAL PLAINS TO UPPER MS VALLEY...
FEW CHANGES TO PRIOR OUTLOOK/FORECAST REASONING. SEE PREVIOUS
DISCUSSION BELOW...AND REFERENCE LATEST MESOSCALE
DISCUSSIONS/WATCHES FOR THE MOST CONTEMPORARY INFORMATION.

...MIDWEST/GREAT LAKES TO NORTHEAST STATES...
SCATTERED STRONG/SEVERE TSTMS WILL CONTINUE ACROSS THE REGION INTO
THIS EVENING ESPECIALLY IN VICINITY OF THE LOWER GREAT LAKES...WITH
DAMAGING WINDS THE PRIMARY CONCERN. IN ADDITION...A TORNADO OR TWO
IS STILL POSSIBLE...MOST PROBABLE WITH ANY SEMI-DISCRETE STORM
INTERACTING WITH/CROSSING THE RETREATING WARM FRONT THAT IS
CURRENTLY ANALYZED AT MID AFTERNOON FROM CENTRAL UPSTATE NY TO
EASTERN PA/NYC METRO VICINITY.

FARTHER WEST...ADDITIONAL STORMS SHOULD CONTINUE TO DEVELOP ACROSS
THE MIDWEST/LAKE MI VICINITY THROUGH THIS EVENING. REFERENCE
MESOSCALE DISCUSSION 1432 AND SEVERE TSTM WATCH 522.

...SOUTH FL...
HAVE DROPPED CATEGORICAL SLIGHT RISK ACROSS SOUTH FL...AS THE
TORNADO THREAT APPEARS LOW WITH THE CONTINUED WESTWARD MOVEMENT OF
TROPICAL STORM BONNIE.

...FL PANHANDLE/SOUTHERN AL/SOUTHWEST GA/SOUTHEAST MS...
MOIST AIRMASS/STEEP LOW LEVEL RATES AND A STRONGLY UNSTABLE BOUNDARY
LAYER MAY SUPPORT SOME STORMS CAPABLE OF MAINLY DAMAGING WINDS LATE
THIS AFTERNOON/EARLY EVENING. FOR ADDITIONAL INFORMATION...REFERENCE
MESOSCALE DISCUSSION 1431.

..GUYER.. 07/23/2010

.PREV DISCUSSION... /ISSUED 1118 AM CDT FRI JUL 23 2010/

...CENTRAL/NRN PLAINS INTO THE UPPER MS VLY TODAY/TONIGHT...

S/WV TROUGH MT CONTINUES EWD ACROSS THE NRN PLAINS TO UPPER MS
VALLEY BY LATER TONIGHT. SFC COLD FRONT CURRENTLY ERN MT SWWD INTO
NRN WY WILL PUSH SEWD ACROSS WRN DAKOTAS IN ADVANCE OF TROUGH WHILE
A DEVELOPING SURFACE LOW WRN SD DROPS SEWD INTO NRN NEB BY THIS
EVENING. WARM FRONT WILL LIFT NWD AHEAD OF SURFACE LOW INTO SRN SD
BY THIS AFTERNOON AS A MOIST LOW LEVEL AIR MASS SPREADS NWWD THRU
ERN NEB INTO SD.

PLUME OF STEEP MID LEVEL LAPSE RATES ADVECTING EWD AHEAD OF COLD
FRONT/UPPER TROUGH ACROSS SD/NE IN CONCERT WITH DEWPOINTS TO NEAR
70F WILL LEAD TO A MDTLY UNSTABLE AIR MASS WITH MLCAPES AOA 3000
J/KG BY MID AFTERNOON VICINITY WARM FRONT/AHEAD OF SURFACE LOW.

LARGE SCALE ASCENT SPREADING EWD WITH TROUGH ALONG WITH 35-40KT OF
DEEP LAYER SHEAR WILL LEAD TO DEVELOPMENT OF SEVERE THUNDERSTORMS BY
LATER THIS AFTERNOON FROM WRN/CENTRAL SD SWD INTO NRN NEB.
PARAMETERS SUPPORT SUPERCELL POTENTIAL INCLUDING VERY LARGE HAIL AND
ISOLATED TORNADOES.

BY THIS EVENING STORMS EXPECTED TO DEVELOP UPSCALE INTO A FORWARD
PROPAGATING MCS VICINITY WARM FRONT THAT WILL EXTEND EWD VICINITY
MN/IA BORDER. WIND DAMAGE WILL THEN BECOME PRIMARY SEVERE THREAT AT
THIS STAGE.

...MID WEST/OH VLY INTO LWR GRT LAKES/NRN APPALACHIANS...
PLUME OF VERY HIGH PWAT IN EXCESS OF 2 INCHES EXTENDS EWD VICINITY
STALLED FRONTAL ZONE FROM IA EWD SRN LM AND INTO WRN NY. SURFACE
HEATING HAS RAPIDLY DIMINISHED THE CINH TO S OF FRONTAL ZONE WITH
SBCAPES IN EXCESS OF 3000 J/KG WHERE SURFACE TEMPS HAVE WARMED INTO
UPR 80S. THE VERY WARM MID LEVELS AND WEAK LAPSE RATES WILL
SOMEWHAT LIMIT THE SEVERE POTENTIAL. HOWEVER THE 30-40 KT 2-3KM WLY
FLOW COUPLED WITH THE VERY HIGH PWAT WILL LEAD TO A STEADY INCREASE
IN WIND DAMAGE POTENTIAL THROUGH THE AFTERNOON AS SURFACE BASED
STORMS DEVELOP AND BECOME MORE WIDESPREAD. LOW LEVEL CONVERGENCE IS
GENERALLY WEAK WITH THE BEST FOCUS VICINITY LAKE BREEZES ON LE AND
WRN LO.

ADDITIONAL STRONG/SEVERE STORMS WILL LIKELY REDEVELOP VICINITY MS
RIVER IA/IL BY LATER THIS AFTERNOON IN ADVANCE OF THE EXPECTED MCS
THAT WILL BE EVOLVING OVER SD/NE. THE VERY MOIST AND UNSTABLE AIR
MASS IN PLACE WILL FUEL SURFACE BASED STORMS IN THE FAVORABLE LOW
LEVEL CONVERGENCE VICINITY OF E/W OUTFLOW BOUNDARY THAT EXTENDS WWD
FROM NEAR CHI TO W OF MLI. AGAIN WITH WEAK LAPSE RATES DAMAGING
WINDS ALONG WITH HEAVY RAIN WOULD BE PRIMARY THREAT THIS AREA.

FARTHER E...STORMS EXPECTED TO INTENSITY/DEVELOP VICINITY WARM FRONT
OVER PA/NY LATER THIS AFTERNOON. LOW LEVEL SHEAR WILL BE MORE
FAVORABLE THIS REGION AS WARM FRONT CONTINUES TO SHIFT NWD FOR
POSSIBLE ROTATING STORMS AND A TORNADO OR TWO THROUGH THIS EVENING.
THE AMOUNT OF DESTABILIZATION THAT CAN OCCUR IS STILL A QUESTION AS
CURRENT CLOUD COVER WILL SLOW THE HEATING AND POSSIBLY DELAY THE
PRIMARY THREAT UNTIL THIS EVENING.

... S FL...
CIRCULATION CENTER WITH T.S. BONNIE HAS MOVED ONSHORE JUST N OF HST
AT 16Z. BANDS OF CONVECTION WILL CONTINUE TO MOVE ONSHORE NWD TO MLB
FOR NEXT FEW HOURS. WITH 30-40 KT OF LOW LEVEL SHEAR WILL CONTINUE
A THREAT OF ISOLATED TORNADOES.

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WATCHES: Severe Thunderstorm Watch Number 522

WWUS20 KWNS 231958
SEL2
SPC WW 231958
IAZ000-ILZ000-LMZ000-240200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 522
NWS STORM PREDICTION CENTER NORMAN OK
300 PM CDT FRI JUL 23 2010

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

PARTS OF EASTERN IOWA
PARTS OF NORTHERN ILLINOIS
LAKE MICHIGAN

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 900
PM CDT.

HAIL TO 1 INCH 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 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST OF
MOLINE ILLINOIS TO 45 MILES EAST NORTHEAST OF MEIGS FIELD
ILLINOIS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 521...

DISCUSSION...AIR MASS RECOVERING FROM MORNING CONVECTION HAS BECOME
MDTLY UNSTABLE ACROSS THE WATCH AREA. STORMS HAVE INTENSIFIED OVER
ERN IA WITH A DEVELOPING COLD POOL. GIVEN MLCAPES OF 2500 AND
30-40KT OF MID LEVEL FLOW...DAMAGING WINDS WILL BECOME INCREASING
THREAT ACROSS THE WATCH AREA REMAINDER OF AFTERNOON.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION
VECTOR 26035.

...HALES

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