

000 

WWUS20 KWNS 251905

SEL9

SPC WW 251905

IAZ000-MNZ000-WIZ000-260200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 359

NWS STORM PREDICTION CENTER NORMAN OK

205 PM CDT SUN MAY 25 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF NORTHERN IOWA

       MUCH OF SOUTHERN MINNESOTA

       MUCH OF WESTERN WISCONSIN



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 205 PM UNTIL 900

PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 3 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 85 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTH NORTHWEST OF

FAIRMONT MINNESOTA TO 50 MILES EAST NORTHEAST OF LA CROSSE

WISCONSIN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 357...WW 358...



DISCUSSION...RAPIDLY DESTABILIZATION AIR MASS AHEAD OF COLD FRONT

ALONG WITH STRONG MID/UPPER JET PROVIDING PARAMETERS FOR SEVERE

THUNDERSTORM DEVELOPMENT.  THE E/W BOUNDARY FROM EARLIER CONVECTION

WILL ENHANCE SHEAR PROFILES AND TORNADIC SUPERCELL POTENTIAL.  THERE

IS THE THREAT FOR LONG LIVED SUPERCELLS TO DEVELOP WITH ASSOCIATED

STRONG TORNADOES.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 24035.





...HALES

