

643 

WWUS20 KWNS 290023

SEL0

SPC WW 290023

KSZ000-290500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 40

NWS STORM PREDICTION CENTER NORMAN OK

545 PM CST TUE FEB 28 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL KANSAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 545 PM UNTIL

1100 PM CST.



TORNADOES...HAIL TO 1.5 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 55 STATUTE

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

SALINA KANSAS TO 45 MILES SOUTH OF WICHITA KANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU0).



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 39...



DISCUSSION...CONVECTION HAS INCREASED ALONG THE DRYLINE...AND A FEW

SUSTAINED STORMS MAY EMERGE IN THE NEXT 1-2 HOURS WITHIN THE WEAK

INSTABILITY/STRONG VERTICAL SHEAR ENVIRONMENT.  THE EXTREMELY STRONG

DEEP-LAYER SHEAR WILL TEND TO DELAY STORM MATURATION...BUT A

SUFFICIENTLY MOIST AND STRONG LOW-LEVEL SHEAR ENVIRONMENT WILL FAVOR

SOME RISK FOR A TORNADO OR TWO WITH ANY PERSISTENT SUPERCELLS.

OTHERWISE...ISOLATED LARGE HAIL AND DAMAGING GUSTS WILL BE POSSIBLE.

 LATER TONIGHT...THERE WILL ALSO BE SOME RISK FOR ADDITIONAL STORM

DEVELOPMENT AS THE COLD FRONT OVERTAKES THE DRYLINE ACROSS

CENTRAL/ERN KS.



AVIATION...TORNADOES AND 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

400. MEAN STORM MOTION VECTOR 24050.





...THOMPSON

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