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WWUS20 KWNS 051442

SEL9

SPC WW 051442

ILZ000-INZ000-KYZ000-052200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 619

NWS STORM PREDICTION CENTER NORMAN OK

940 AM CDT WED SEP 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN ILLINOIS

       CENTRAL AND SOUTHERN INDIANA

       NORTHERN KENTUCKY



EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 940 AM UNTIL

500 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 90

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH OF

INDIANAPOLIS INDIANA TO 40 MILES WEST SOUTHWEST OF EVANSVILLE

INDIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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...BROKEN SQLN IN S CNTRL IL EXPECTED TO CONTINUE

GENERALLY E OR ESE ACROSS THE REMAINDER OF IL AND INTO PARTS OF

IND/KY LATER TODAY.  ACTIVITY IS...IN PART...LIKELY SUPPORTED BY AN

IMPULSE IN THE SRN STREAM JET /EXTENDING ROUGHLY W-E THROUGH CNTRL

PARTS OF KS-MO/. THE SQLN MAY BE ENHANCED LATER THIS MORNING BY

STRONG SFC HEATING AND LIGHT SSELY LOW-LVL FLOW TO ITS EAST.  WHILE

AREA WIND PROFILES APPEAR SOMEWHAT DISORGANIZED ATTM...WIND FIELD

EXPECTED TO BECOME MORE FAVORABLE FOR FORWARD-PROPAGATION BY MIDDAY.

COUPLED WITH RELATIVELY STEEP MID LVL LAPSE RATES AND AMPLE LOW-LVL

MOISTURE...SETUP MAY YIELD BOTH DMGG WIND AND SVR HAIL.



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 28030.





...CORFIDI

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