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WWUS20 KWNS 272146

SEL9

SPC WW 272146

INZ000-KYZ000-OHZ000-VAZ000-WVZ000-280500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 239

NWS STORM PREDICTION CENTER NORMAN OK

545 PM EDT WED APR 27 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN INDIANA

       CENTRAL AND EASTERN KENTUCKY

       SOUTHERN OHIO

       WESTERN VIRGINIA

       WESTERN WEST VIRGINIA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 545

PM UNTIL 100 AM EDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

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



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTH OF OWENSBORO

KENTUCKY TO 65 MILES SOUTHEAST OF HUNTINGTON WEST VIRGINIA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 232...WW 233...WW

234...WW 235...WW 236...WW 237...WW 238...



DISCUSSION...TSTMS ARE EXPECTED TO INTENSIFY THIS EVENING E OF

MIGRATORY SURFACE LOW DEVELOPING NEWD FROM NW OF PAH TOWARD WRN LAKE

ERIE.  FOCUSED MOISTURE AND HEAT FLUXES OCCURRING ALONG

STRENGTHENING LLJ AXIS SHOULD SUPPORT SUFFICIENT DESTABILIZATION TO

SUSTAIN LONG-LIVED UPDRAFTS WITHIN NWD-EXPANDING WARM SECTOR.  GIVEN

THE STRONG AMBIENT VERTICAL SHEAR IN PLACE...THE POTENTIAL WILL

EXIST FOR SUPERCELLS AND BOWING STRUCTURES CAPABLE OF TORNADOES AND

DAMAGING WINDS.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350.

MEAN STORM MOTION VECTOR 22045.





...MEAD

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