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475 

WWUS20 KWNS 290619

SEL7

SPC WW 290619

INZ000-MIZ000-OHZ000-LEZ000-LHZ000-LMZ000-291400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 697

NWS STORM PREDICTION CENTER NORMAN OK

215 AM EDT FRI JUL 29 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       FAR NORTHERN INDIANA

       SOUTHERN LOWER MICHIGAN

       FAR NORTHWEST OHIO

       FAR WESTERN LAKE ERIE

       FAR SOUTHERN LAKE HURON

       FAR SOUTHEASTERN LAKE MICHIGAN



EFFECTIVE THIS FRIDAY MORNING FROM 215 AM UNTIL 1000 AM EDT.



HAIL TO 0.5 INCH 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 35 MILES EAST

SOUTHEAST OF SOUTH BEND INDIANA TO 20 MILES NORTHEAST OF MOUNT

CLEMENS MICHIGAN.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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...SMALL SCALE BOWS WITH LOCALLY DMGG WIND MAY OCCUR OVER

WW THIS MORNING...WHERE ZONE OF JET ENTRANCE REGION ASCENT AND LOW

LVL WAA WILL REMAIN COINCIDENT WITH CORRIDOR OF 2.25 INCH PW AND

MODERATE...DEEP UNIDIRECTIONAL FLOW.  MID LVL WLY WINDS MAY INCREASE

TO AROUND 50 KTS OVER SE LWR MI BY DAWN...AND COULD EXTEND RISK FOR

BOWING STRUCTURES/SPORADIC HIGH WIND EWD INTO LK ERIE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 26030.





...CORFIDI

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