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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 714

NWS STORM PREDICTION CENTER NORMAN OK

1035 PM CDT MON AUG 1 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PORTIONS OF CENTRAL AND NORTHERN MINNESOTA

       EXTREME NORTHWEST WISCONSIN



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1035 PM

UNTIL 600 AM CDT.



HAIL TO 1.5 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 95 MILES EAST OF

BRAINERD MINNESOTA TO 35 MILES WEST SOUTHWEST OF DETROIT LAKES

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



DISCUSSION...A BAND OF ELEVATED THUNDERSTORMS CONTINUES TO INCREASE

SLOWLY IN RESPONSE TO LOW-LEVEL WAA ABOVE A SURFACE FRONT/COLD POOL

REINFORCED BY EARLIER CONVECTION.  A FEED OF STRONG INSTABILITY FROM

SW ABOVE THE FRONT WILL MAINTAIN STRONG UPDRAFTS...WITH SOME

POTENTIAL FOR ISOLATED LARGE HAIL.  ANOTHER CONCERN WITHIN A FEW

HOURS WILL BE DAMAGING WINDS WITH STORM MERGERS AND EVENTUAL COLD

POOL DEVELOPMENT.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 29030.





...THOMPSON

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