

000 

WWUS20 KWNS 232335

SEL8

SPC WW 232335

KSZ000-OKZ000-240700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 168

NWS STORM PREDICTION CENTER NORMAN OK

635 PM CDT MON APR 23 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL KANSAS

       FAR NORTH CENTRAL OKLAHOMA



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 635 PM UNTIL

200 AM CDT.



TORNADOES...HAIL TO 3 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 75 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 40 MILES SOUTH SOUTHWEST OF

GOODLAND KANSAS TO 5 MILES SOUTHEAST OF WICHITA KANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU8).



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 165...WW 166...WW 167...



DISCUSSION...SEVERE THUNDERSTORMS ARE EXPECTED TO CONTINUE

INCREASING IN COVERAGE AND INTENSITY THIS EVENING/OVERNIGHT ACROSS

MUCH OF THE WRN HALF OF KS.  THIS WILL OCCUR ALONG NOSE/AXIS OF 40+

KT SLY LLJ WITHIN MODERATE INSTABILITY AND STRONG DEEP LAYER SHEAR.

SURFACE WARM FRONT WILL BECOME BETTER DEFINED AND LIFT NWD INTO

CENTRAL/NWRN KS AND FAR SWRN NEB THIS EVENING...INCREASING LOW LEVEL

SHEAR ACROSS WW.  GIVEN LIKELIHOOD OF SUPERCELLS AND STEEP LAPSE

RATES...VERY LARGE HAIL SHOULD ACCOMPANY STRONGER STORMS.  TORNADO

THREAT WILL ALSO BECOME ENHANCED THIS EVENING AND LIKELY PERSIST

WELL INTO THE NIGHT.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 22025.





...EVANS

