

000 

WWUS20 KWNS 282311

SEL6

SPC WW 282311

KSZ000-OKZ000-010800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 36

NWS STORM PREDICTION CENTER NORMAN OK

510 PM CST WED FEB 28 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST AND EAST CENTRAL KANSAS

       NORTHEAST OKLAHOMA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 510

PM UNTIL 200 AM CST.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF

EMPORIA KANSAS TO 20 MILES SOUTH OF TULSA OKLAHOMA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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...DEEPENING CUMULUS ALONG RETREATING MOISTURE BOUNDARY IN

SE KS SUGGESTS THAT CONVECTIVE INITIATION IS LIKELY IN THE NEXT 1-2

HOURS...WITH MORE ISOLATED STORM DEVELOPMENT ALSO POSSIBLE SWD ALONG

THE DRYLINE INTO NE OK.  THE ENVIRONMENT INITIALLY WILL SUPPORT A

THREAT FOR LARGE HAIL AND ISOLATED DAMAGING WINDS WITH SUPERCELLS.

BY LATE EVENING AND OVERNIGHT...THE THREAT FOR TORNADOES WILL

INCREASE IN CONJUNCTION WITH ADDITIONAL LOW-LEVEL MOISTENING AND

STRENGTHENING VERTICAL SHEAR IN ADVANCE OF A DEEPENING SURFACE LOW

AND STRONG MID-UPPER JET STREAK.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

450. MEAN STORM MOTION VECTOR 24035.





...THOMPSON

