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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 650

NWS STORM PREDICTION CENTER NORMAN OK

930 PM CDT TUE JUL 1 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST MINNESOTA

       FAR NORTHWEST WISCONSIN

       LAKE SUPERIOR



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 930 PM

UNTIL 400 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 65

STATUTE MILES EITHER SIDE OF A LINE FROM 55 MILES NORTH NORTHWEST

OF BRAINERD MINNESOTA TO 10 MILES SOUTHEAST OF GRAND MARAIS

MINNESOTA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 648...WW 649...



DISCUSSION...INCREASING WSWLY LLJ ASSOCIATED WITH STRONG MID LEVEL

SHORTWAVE TROUGH APPROACHING THE REGION WILL SUSTAIN ELEVATED

THUNDERSTORMS ACROSS WW THROUGH EARLY TONIGHT.  FEED OF STEEP MID

LEVEL LAPSE RATES AND MODERATE INSTABILITY TO THE WSW OF THIS

REGION...ALONG WITH EFFECTIVE SHEAR FROM 40-50 KT...WILL ALSO

SUPPORT RISK OF LARGE HAIL AND ISOLATED DAMAGING WINDS WITH STRONGER

CORES.



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 32025.





...EVANS

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