

000 

WWUS20 KWNS 302142

SEL4

SPC WW 302142

IAZ000-MNZ000-WIZ000-010500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 204

NWS STORM PREDICTION CENTER NORMAN OK

445 PM CDT MON APR 30 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST IOWA

       SOUTHEAST MINNESOTA

       SOUTHWEST WISCONSIN



EFFECTIVE THIS MONDAY AFTERNOON FROM 445 PM UNTIL MIDNIGHT CDT.



HAIL TO 2 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 55

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

NORTHWEST OF MASON CITY IOWA TO 30 MILES EAST OF LONEROCK

WISCONSIN.  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 202...WW 203...



DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND

INTENSITY THIS EVENING ACROSS SOUTHEAST MN AND TRACK

EAST-SOUTHEASTWARD INTO SOUTHWEST WI.  OTHER MORE ISOLATED STORMS

ARE POSSIBLE ACROSS NORTHEAST IA ALONG AND NORTH OF SURFACE WARM

FRONT.  FAVORABLE DEEP LAYER VERTICAL SHEAR PROFILES AND SUFFICIENT

CAPE WILL PROMOTE A RISK OF SUPERCELLS CAPABLE OF LARGE HAIL AND

DAMAGING WINDS.



AVIATION...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 450. MEAN STORM

MOTION VECTOR 27030.





...HART

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