

000 

WWUS20 KWNS 032134

SEL8

SPC WW 032134

KSZ000-OKZ000-TXZ000-040300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 438

NWS STORM PREDICTION CENTER NORMAN OK

430 PM CDT TUE JUN 3 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST KANSAS

       NORTHWEST OKLAHOMA AND THE OKLAHOMA PANHANDLE

       THE EXTREME NORTHEAST TEXAS PANHANDLE



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 430 PM UNTIL

1000 PM CDT.



HAIL TO 2 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 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 5 MILES SOUTHWEST OF

ELKHART KANSAS TO 15 MILES EAST NORTHEAST OF ALVA OKLAHOMA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 434...WW 435...WW

436...WW 437...



DISCUSSION...SEVERE STORMS HAVE DEVELOPED IN THE ZONE OF ENELY

LOW-LEVEL FLOW TO THE N OF A STALLED BOUNDARY THAT STRETCHES ACROSS

THE NRN TX PANHANDLE INTO NW OK AND CENTRAL KS.  THIS CONVECTION

WILL LIKELY SPREAD EWD ALONG AND N OF THE BOUNDARY WHERE BOUNDARY

LAYER DEWPOINTS ARE BEING MAINTAINED FROM THE MID 50S W TO MID 60S

E...AND CONVECTIVE INHIBITION IS SMALL.  ADDITIONALLY...A MID LEVEL

SHORTWAVE TROUGH IS APPROACHING THIS AREA FROM NE NM/SE CO AND WILL

CONTRIBUTE TO A FAVORABLE ENVIRONMENT FOR AT LEAST WIDELY SCATTERED

STORMS THROUGH LATE EVENING.  EFFECTIVE BULK SHEAR AND INSTABILITY

WILL REMAIN SUFFICIENT FOR SUPERCELLS...WITH LARGE HAIL AND ISOLATED

DAMAGING GUSTS THE MAIN THREATS.



AVIATION...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 500. MEAN STORM

MOTION VECTOR 27020.





...THOMPSON

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