SEL9
SPC WW 220202
MNZ000-220700-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 159
NWS STORM PREDICTION CENTER NORMAN OK
905 PM CDT SAT APR 21 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WEST CENTRAL MINNESOTA
EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 905 PM
UNTIL 200 AM 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 EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF
ALEXANDRIA MINNESOTA TO 45 MILES WEST OF REDWOOD FALLS MINNESOTA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).
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 154...WW 155...WW
156...WW 157...WW 158...
DISCUSSION...ELEVATED THUNDERSTORMS WITH THREAT OF LARGE HAIL AND
ISOLATED DAMAGING WINDS WILL CONTINUE EWD ALONG NOSE OF STRONG SLY
LLJ LATE THIS EVENING. MUCAPE REMAINS AROUND 1500-2000 J/KG WITH
EFFECTIVE BULK SHEAR AROUND 50 KT SUPPORTING ORGANIZED LINES AND
SUPERCELLS.
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 500. MEAN STORM
MOTION VECTOR 26025.
..EVANS
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