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145 

WWUS20 KWNS 051646

SEL7

SPC WW 051646

ILZ000-INZ000-KYZ000-MOZ000-TNZ000-052300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 117

NWS STORM PREDICTION CENTER NORMAN OK

1145 AM CDT SUN APR 5 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF SOUTHERN ILLINOIS

       MUCH OF SOUTHERN INDIANA

       MUCH OF WESTERN AND CENTRAL KENTUCKY

       SMALL PART OF SOUTHEAST MISSOURI

       PARTS OF NORTHWEST TENNESSEE



EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1145 AM UNTIL 600

PM CDT.



TORNADOES...HAIL TO 2 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHEAST OF

BLOOMINGTON INDIANA TO 60 MILES SOUTHWEST OF CLARKSVILLE

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



DISCUSSION...STRONG S/WV TROUGH AND ASSOCIATED 100KT MID LEVEL JET

MAX WILL BE TRACKING INTO LOWER OH VALLEY THIS AFTERNOON. DEEPENING

SURFACE LOW MOVES ACROSS CENTRAL IL INTO IND WITH COLD FRONT

EXTENDING SSWWD INTO CENTRAL AR ATTM.  LOW LEVEL MOISTURE INCREASING

IN WARM SECTOR ALONG WITH SURFACE HEATING WILL RAISE MLCAPES TO NEAR

1000 J/KG.  SEVERE THUNDERSTORMS INCLUDING SUPERCELLS WILL DEVELOP

AHEAD OF SURFACE LOW AND COLD FRONT AND TRACK RAPIDLY ENEWD ACROSS

THE WATCH.  IN ADDITION TO DAMAGING WINDS/HAIL...TORNADOES WILL BE

POSSIBLE...PARTICULARLY WITH ANY SUPERCELL THAT IS ABLE TO DEVELOP

IN WARM SECTOR.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24050.





...HALES

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