Tornado Watch 804

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.
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
. MINNESOTA COUNTIES INCLUDED ARE
ANOKA BLUE EARTH BROWN
CARVER CHISAGO COTTONWOOD
DAKOTA DODGE FARIBAULT
FILLMORE FREEBORN GOODHUE
HENNEPIN HOUSTON ISANTI
JACKSON LE SUEUR MARTIN
MCLEOD MEEKER MOWER
NICOLLET OLMSTED RAMSEY
REDWOOD RENVILLE RICE
SCOTT SHERBURNE SIBLEY
STEELE WABASHA WASECA
WASHINGTON WATONWAN WINONA
WRIGHT
WISCONSIN COUNTIES INCLUDED ARE
BARRON BUFFALO CHIPPEWA
CLARK DUNN EAU CLAIRE
JACKSON LA CROSSE MONROE
PEPIN PIERCE POLK
RUSK ST. CROIX TAYLOR
TREMPEALEAU