

000 

WWUS20 KWNS 240748

SEL6

SPC WW 240748

KSZ000-OKZ000-241100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 296

NWS STORM PREDICTION CENTER NORMAN OK

240 AM CDT THU MAY 24 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN HALF OF KANSAS

       MUCH OF THE WESTERN HALF OKLAHOMA



EFFECTIVE THIS THURSDAY MORNING FROM 240 AM UNTIL 600 AM CDT.



HAIL TO 1.5 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES SOUTH

SOUTHWEST OF CLINTON OKLAHOMA TO 20 MILES NORTH NORTHWEST OF

SAINT JOSEPH MISSOURI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 294...TORNADO WATCH NUMBER 295.

WATCH NUMBER 294 295 WILL NOT BE IN EFFECT AFTER 240 AM CDT.



DISCUSSION...COMPLEX LINE OF STRONG/LOCALLY-SEVERE STORMS CONTINUES

FROM NERN KS SWWD ACROSS SWRN OK ATTM...ALONG/AHEAD OF SURFACE COLD

FRONT.  WITH 500 TO 1500 J/KG MEAN-LAYER CAPE ACROSS THE WARM

SECTOR...STORMS SHOULD MAINTAIN THEIR CURRENT INTENSITY FOR THE NEXT

FEW HOURS.  WHILE LOCALLY-DAMAGING WINDS NEAR SMALL-SCALE BOWS

EMBEDDED WITHIN THE LINE SHOULD BE THE MOST SIGNIFICANT SEVERE

THREAT...HAIL AROUND AN INCH IN DIAMETER WILL ALSO BE POSSIBLE.

ADDITIONALLY...WHILE DEGREE OF LOW-LEVEL SHEAR SUPPORTS THE

POTENTIAL FOR AN ISOLATED TORNADO...STORM MODE SUGGESTS THAT THE

OVERALL THREAT REMAINS LOW.



AVIATION...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 500. MEAN STORM

MOTION VECTOR 24030.





...GOSS

