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133 

WWUS20 KWNS 222051

SEL6

SPC WW 222051

MIZ000-LEZ000-230200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 516

NWS STORM PREDICTION CENTER NORMAN OK

455 PM EDT THU JUL 22 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN LOWER MICHIGAN

       LAKE ERIE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 455 PM UNTIL

1000 PM EDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 25 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST SOUTHWEST OF

JACKSON MICHIGAN TO 20 MILES SOUTHEAST OF DETROIT MICHIGAN.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 514...



DISCUSSION...A SUPERCELL HAS INTENSIFIED AND IS TRACKING

EAST-SOUTHEASTWARD ALONG THE SURFACE WARM FRONT ACROSS SOUTHERN

LOWER MI.  ENHANCED LOW LEVEL SHEAR AND CONVERGENCE ALONG THE

BOUNDARY WILL MAINTAIN A RISK OF ISOLATED TORNADOES...ALONG WITH

DAMAGING WINDS AND HAIL FOR ANOTHER SEVERAL HOURS.



AVIATION...TORNADOES AND 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 27030.





...HART

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