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IAZ000-MNZ000-SDZ000-WIZ000-260500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 412

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT FRI JUN 25 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN IOWA

       SOUTHERN MINNESOTA

       EASTERN SOUTH DAKOTA

       WESTERN WISCONSIN



EFFECTIVE THIS FRIDAY AFTERNOON FROM 335 PM UNTIL MIDNIGHT CDT.



TORNADOES...HAIL TO 4 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 80 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST SOUTHWEST OF

BROOKINGS SOUTH DAKOTA TO 40 MILES EAST NORTHEAST OF ROCHESTER

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 411...



DISCUSSION...SVR TSTM POTENTIAL FCST TO INCREASE RAPIDLY OVER

WRN/CENTRAL PORTIONS OF WW AREA THROUGH REMAINDER

AFTERNOON...EXPANDING/SPREADING EWD.  INITIALLY SUPERCELLULAR

CONVECTIVE MODE MAY TRANSITION UPSCALE TO DAMAGING MCS...PER

MESOSCALE DISCUSSION 1123.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

600. MEAN STORM MOTION VECTOR 28025.





...EDWARDS/HART

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