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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 423

NWS STORM PREDICTION CENTER NORMAN OK

515 PM CDT FRI JUN 3 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL WISCONSIN



EFFECTIVE THIS FRIDAY AFTERNOON FROM 515 PM UNTIL MIDNIGHT CDT.



TORNADOES...HAIL TO 2 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 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST SOUTHWEST OF

EAU CLAIRE WISCONSIN TO 30 MILES EAST NORTHEAST OF GREEN BAY

WISCONSIN.  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.



DISCUSSION...STORM INITIATION HAS RECENTLY OCCURRED WSW EAU ON THE

NRN EDGE OF LOW-LEVEL THERMAL AXIS WHERE TEMPERATURES HAS WARMED

INTO THE LOW/MID 90S.  OBJECTIVE GUIDANCE SUGGESTS THAT A CAP EXISTS

ACROSS DOWNSTREAM WARM SECTOR...THOUGH IT APPEARS THAT THE STRONG

DIABATIC HEATING MAY BE SUFFICIENT TO SUSTAIN ISOLATED STORMS PRIOR

TO 00Z.  AMBIENT ENVIRONMENT IS RATHER MOIST WITH DEWPOINTS IN THE

MID/UPPER 60S...RESULTING IN MLCAPE OF 2500-3500 J/KG.  AREA

PROFILER/VWP DATA INDICATE VERTICALLY VEERING WIND PROFILES WITH

SUFFICIENT LOW AND DEEP-LAYER SHEAR TO SUPPORT SUPERCELLS CAPABLE OF

TORNADOES...LARGE HAIL AND DAMAGING WIND GUSTS.



AVIATION...TORNADOES AND 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

550. MEAN STORM MOTION VECTOR 26030.





...MEAD

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