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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 802

NWS STORM PREDICTION CENTER NORMAN OK

600 PM EDT WED AUG 24 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN...CENTRAL...AND SOUTHERN LOWER MICHIGAN

       LAKE ERIE

       LAKE HURON



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 600 PM

UNTIL 100 AM EDT.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHEAST OF OSCODA

MICHIGAN TO 35 MILES SOUTHWEST OF JACKSON MICHIGAN.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU2).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 801...



DISCUSSION...TSTMS EXPECTED TO INCREASE ALONG AND AHEAD OF COLD

FRONT ASSOCIATED WITH AMPLIFYING SHORTWAVE TROUGH NOW OVER CNTRL WI.

STRENGTHENING WIND FIELD...WITH 40 KT WSW 850 MB FLOW VEERING TO

50-60 KT WNW FLOW AT 500 MB...WILL SUPPORT A FEW STRONG / SUSTAINED

SUPERCELLS GIVEN DEGREE OF INSTABILITY AND MODEST LOW LVL

CONVERGENCE.  WHILE THE TORNADO THREAT SHOULD BE GREATEST IN ERN

PART OF WW...ENTIRE REGION WILL BE SUBJECT TO THE POTENTIAL FOR

SUPERCELLS AND POSSIBLY STORM SPLITS WITH LARGE HAIL AND BOWS WITH

DMGG WIND.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 29045.





...CORFIDI

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