

354 

WWUS20 KWNS 192150

SEL5

SPC WW 192150

IAZ000-ILZ000-MNZ000-WIZ000-200500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 715

NWS STORM PREDICTION CENTER NORMAN OK

450 PM CDT WED AUG 19 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN IOWA

       NORTHWEST ILLINOIS

       SOUTHEAST MINNESOTA

       WESTERN WISCONSIN



EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 450 PM UNTIL MIDNIGHT CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES EAST AND WEST OF A LINE FROM 85 MILES NORTH OF EAU CLAIRE

WISCONSIN TO 5 MILES EAST SOUTHEAST OF MOLINE ILLINOIS.  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 713...WW 714...



DISCUSSION...MID LVL VORT AND ASSOCIATED SEASONABLY STRONG WIND

FIELD...ALONG WITH MOIST SELY LOW LVL FLOW AND MODEST SFC HEATING IN

NARROW ZONE OF CLEARING...WILL MAINTAIN SETUP FAVORABLE FOR

RELATIVELY LOW-TOPPED TSTMS WITH ENHANCED LOW LVL ROTATION.  THIS

SETUP MAY PERSIST FOR A FEW MORE HOURS AS THE VORT CONTINUES

NNEWD...AND YIELD A CONTINUING CHANCE FOR A FEW TORNADOES.



AVIATION...TORNADOES AND 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 400.

MEAN STORM MOTION VECTOR 21035.





...CORFIDI

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