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WWUS20 KWNS 161814

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MIZ000-OHZ000-LEZ000-162300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 668

NWS STORM PREDICTION CENTER NORMAN OK

ISSUED BY 15TH OWS SCOTT AIR FORCE BASE IL

210 PM EDT THU SEP 16 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST MICHIGAN

       WESTERN AND CENTRAL OHIO

       LAKE ERIE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

700 PM EDT.



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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES EAST

NORTHEAST OF MOUNT CLEMENS MICHIGAN TO 45 MILES SOUTHEAST OF

DAYTON OHIO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...THUNDERSTORMS WILL CONTINUE DEVELOPING AS A VORT MAX

AND ASSOCIATED SHORT WAVE TROUGH MOVE THROUGH THE AREA.  THE COLD

AIR ALOFT COUPLED WITH STRONG UPEER LEVEL DIFFLUENCE WILL CONTRIBUTE

TO A THREAT OF SEVERE STORMS AS THE ATMOSPHERE CONTINUES TO

DESTABILIZE.



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 27035.





...15_OWS

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