

000 

WWUS20 KWNS 051304

SEL0

SPC WW 051304

MIZ000-LHZ000-LMZ000-052000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 460

NWS STORM PREDICTION CENTER NORMAN OK

905 AM EDT THU JUN 5 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       LOWER MICHIGAN

       LAKE HURON

       LAKE MICHIGAN



EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 905 AM UNTIL

400 PM 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 65

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST

OF MUSKEGON MICHIGAN TO 25 MILES EAST OF BAD AXE MICHIGAN.  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 458...WW 459...



DISCUSSION...MCS INITIALLY OVER LM -- CONTAINING WELL DEFINED BOW

ECHO -- IS FCST TO CONTINUE EWD TO ENEWD ACROSS PORTIONS LOWER

PENINSULA UNDER FAVORABLE KINEMATIC PROFILES.  FOREGOING AIR MASS IS

EXPECTED TO DESTABILIZE GRADUALLY FROM COMBINATION OF WAA AND WEAK

SFC HEATING...WITH INFLOW LAYER PARCELS BECOMING NEARLY SFC BASED

DURING NEXT FEW HOURS.  DAMAGING WIND WILL BE PREDOMINANT

THREAT...WITH OCCASIONAL HAIL ALSO POSSIBLE.



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 500. MEAN STORM

MOTION VECTOR 26035.





...EDWARDS/CORFIDI

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