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WWUS20 KWNS 251838

SEL3

SPC WW 251838

IAZ000-MNZ000-WIZ000-260200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 443

NWS STORM PREDICTION CENTER NORMAN OK

140 PM CDT THU JUL 25 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN IOWA

  SOUTHERN MINNESOTA

  SOUTHWEST WISCONSIN



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 140 PM UNTIL

  900 PM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES WEST

NORTHWEST OF STORM LAKE IOWA TO 40 MILES EAST SOUTHEAST OF LA

CROSSE WISCONSIN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



DISCUSSION...THUNDERSTORMS WILL INCREASE IN COVERAGE/INTENSITY

THROUGH THE AFTERNOON ACROSS SRN MN/NRN IA/SW WI IN A ZONE OF

MODERATE INSTABILITY AND ENOUGH VERTICAL WIND SHEAR FOR

ORGANIZED/SUPERCELL STORMS.  THE STRONGEST STORMS WILL POSE A RISK

FOR LARGE HAIL AND DAMAGING GUSTS THROUGH LATE AFTERNOON/EVENING.



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 500. MEAN STORM

MOTION VECTOR 31025.





...THOMPSON

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