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000 

WWUS20 KWNS 040324

SEL4

SPC WW 040324

MNZ000-WIZ000-041100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 804

NWS STORM PREDICTION CENTER NORMAN OK

1025 PM CDT SUN AUG 3 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN AND EASTERN MINNESOTA

       WESTERN WISCONSIN



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1025 PM UNTIL

600 AM CDT.



TORNADOES...HAIL TO 2.5 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 120 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH NORTHWEST OF

EAU CLAIRE WISCONSIN TO 30 MILES EAST SOUTHEAST OF FAIRMONT

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 803...



DISCUSSION...SLIGHTLY ELEVATED STORMS NOW FORMING OVER S CNTRL MN

LIKELY WILL CONTINUE TO MOVE/DEVELOP E/SE ALONG 925/850 MB THERMAL

GRADIENT.  WHILE ACTIVITY APPEARS TO PRIMARY BE DRIVEN BY WAA...WEAK

DPVA MAY ALSO BE PRESENT ON SERN FRINGE OF UPR IMPULSE EXITING THE

ERN DAKS.  COMBINATION OF VERY RICH BOUNDARY LAYER MOISTURE...BACKED

NEAR-SFC FLOW AND MODERATE WLY FLOW ALOFT SUGGEST POTENTIAL FOR

SUPERCELLS WITH LARGE HAIL/HIGH WIND AND...ESPECIALLY W OF THE MS

RVR...TORNADOES.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 27035.





...CORFIDI

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