

000 

WWUS20 KWNS 240051

SEL4

SPC WW 240051

KSZ000-240800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 294

NWS STORM PREDICTION CENTER NORMAN OK

745 PM CDT WED MAY 23 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL KANSAS



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 745 PM

UNTIL 300 AM CDT.



HAIL TO 2.5 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 70

STATUTE MILES EITHER SIDE OF A LINE FROM 50 MILES WEST OF

HUTCHINSON KANSAS TO 25 MILES EAST SOUTHEAST OF MANHATTAN KANSAS.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU4).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 290...WW 291...WW

292...WW 293...



DISCUSSION...STRONG UPPER SYSTEM CONTINUES TO MOVE EWD ACROSS THE

SRN HIGH PLAINS THIS EVENING...WITH ATTENDANT LLJ INTENSIFYING

ACROSS WW OVERNIGHT.  SURFACE COLD FRONT IS SAGGING SLOWLY SWD FROM

NERN INTO SWRN KS... WITH OUTFLOW BOUNDARY FROM EARLIER STORMS

EXTENDING E-W AHEAD OF THE FRONT OVER S-CENTRAL KS.  ENHANCED LIFT

AND MODERATE INSTABILITY WILL SUPPORT WIDESPREAD THUNDERSTORMS

THROUGH THE NIGHT.  VERY STRONG SHEAR WILL REMAIN SUPPORTIVE OF

SUPERCELLS...THOUGH LARGE HAIL MAY BE PRIMARY SEVERE THREAT GIVEN

THE ELEVATED NATURE OF THE STORMS.  SOME OF THE HAIL COULD BECOME

QUITE LARGE...AND ISOLATED WIND DAMAGE MAY OCCUR IF STORMS CAN

SUSTAIN A LINEAR CONFIGURATION.  HEAVY RAINFALL AND TRAINING OF

STORMS OVER AREAS ALREADY SATURATED FROM EARLIER ACTIVITY WILL ALSO

BE A HAZARD.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25035.





...EVANS

