

000 

WWUS20 KWNS 140249

SEL6

SPC WW 140249

OKZ000-140800-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 396

NWS STORM PREDICTION CENTER NORMAN OK

945 PM CDT WED JUN 13 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWESTERN THROUGH CENTRAL OKLAHOMA



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 945 PM

UNTIL 300 AM CDT.



HAIL TO 1 INCH 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 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES WEST

SOUTHWEST OF CLINTON OKLAHOMA TO 35 MILES SOUTH SOUTHEAST OF

PONCA CITY OKLAHOMA.  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 394. WATCH NUMBER 394 WILL NOT

BE IN EFFECT AFTER 945 PM CDT. CONTINUE...WW 395...



DISCUSSION...MCS WITH EMBEDDED SUSTAINED STORMS/MARGINAL SUPERCELLS

EXPECTED TO PERSIST THROUGH EARLY THURSDAY ACROSS WRN/CNTRL

OK...WHERE MODERATE SLY LLJ WILL IMPINGE ON SW-NE ORIENTED GUST

FRONT.  BOUNDARY WILL DRIFT ONLY SLOWLY ESEWD...LARGELY PARALLEL TO

MEAN FLOW.  COUPLED WITH PRESENCE OF CONSIDERABLE SFC-BASED CAPE /ON

THE ORDER OF 2500 J PER KG/ AND MINIMAL CIN...POTENTIAL WILL EXIST

FOR WET MICROBURSTS ...ISOLATED LARGE HAIL AND PERHAPS A BRIEF

TORNADO AS STORMS MOVE/DEVELOP ALONG THE BOUNDARY.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 25020.





...CORFIDI

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