

000 

WWUS20 KWNS 022232

SEL3

SPC WW 022232

MIZ000-LHZ000-030400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 333

NWS STORM PREDICTION CENTER NORMAN OK

635 PM EDT SAT JUN 2 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN LOWER MICHIGAN

       LAKE HURON



EFFECTIVE THIS SATURDAY NIGHT FROM 635 PM UNTIL MIDNIGHT EDT.



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 EAST AND WEST OF A LINE FROM 25 MILES EAST

NORTHEAST OF PELLSTON MICHIGAN TO 50 MILES SOUTHEAST OF SAGINAW

MICHIGAN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 331...WW 332...



DISCUSSION...LINE OF STRONG/SEVERE THUNDERSTORMS OVER WESTERN LOWER

MI IS FORECAST TO PERSIST THROUGH THE EVENING AND SPREAD EASTWARD

TOWARD LK HURON AFTER DARK.  STEEP LOW AND MID LEVEL LAPSE

RATES...COMBINED WITH INCREASED MESOSCALE ORGANIZATION TO

LINE...WILL POSE A THREAT OF LOCALLY DAMAGING WINDS AND HAIL IN

STRONGER CELLS.



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 450. MEAN STORM

MOTION VECTOR 24030.





...HART

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