

000 

WWUS20 KWNS 310951

SEL9

SPC WW 310951

MNZ000-311400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 779

NWS STORM PREDICTION CENTER NORMAN OK

450 AM CDT THU JUL 31 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST AND CENTRAL MINNESOTA



EFFECTIVE THIS THURSDAY MORNING FROM 450 AM UNTIL 900 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 EITHER SIDE OF A LINE FROM 20 MILES WEST SOUTHWEST

OF ORTONVILLE MINNESOTA TO 40 MILES SOUTH OF MINNEAPOLIS

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 777...WW 778...



DISCUSSION...BOWING MCS/POTENTIAL DERECHO IS EXPECTED TO CONTINUE

RACING ESEWD ACROSS WW EARLY THIS MORNING INVOF STALLED SURFACE

FRONT AND ASSOCIATED INSTABILITY GRADIENT.  WIND DAMAGE WILL LIKELY

BE QUITE INTENSE/WIDESPREAD WITH THESE STORMS.  STRENGTHENING SWLY

LLJ WILL ALSO SUPPORT ELEVATED STORMS AHEAD OF THE LINE WITHIN

DEVELOPING WAA-WING...AND IN WAKE OF SYSTEM ATOP STRONG SURFACE COLD

POOL...WITH THREATS OF LARGE HAIL.



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 29040.





...EVANS

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