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WWUS20 KWNS 221715

SEL8

SPC WW 221715

INZ000-MIZ000-OHZ000-LEZ000-LHZ000-222300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 538

NWS STORM PREDICTION CENTER NORMAN OK

1215 PM CDT WED JUN 22 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF NORTHERN INDIANA

       LARGE PART OF SOUTHERN AND EASTERN LOWER MICHIGAN

       PARTS OF NORTHWEST OHIO

       LAKE ERIE

       LAKE HURON



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL

600 PM CDT.



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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH

NORTHWEST OF BAD AXE MICHIGAN TO 30 MILES EAST SOUTHEAST OF

MUNCIE INDIANA.  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 ARE INCREASING ALONG AND AHEAD OF COLD

FRONT NOW MOVING INTO SWRN MI AND NRN IND.  WITH 40-50KT OF SHEAR

COUPLED WITH MLCAPES AOA 1000 J/KG...CONDITIONS ARE FAVORABLE FOR

COLD POOL DEVELOPMENT AND ACCOMPANYING WIND DAMAGE AS STORMS

CONTINUE TO INTENSITY.



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 24035.





...HALES

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