

063 

WWUS20 KWNS 101612

SEL4

SPC WW 101612

OKZ000-TXZ000-102300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 364

NWS STORM PREDICTION CENTER NORMAN OK

1110 AM CDT WED JUN 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN OKLAHOMA

       EASTERN TEXAS PANHANDLE



EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1110 AM UNTIL

600 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHWEST OF

CLINTON OKLAHOMA TO 15 MILES NORTH OF ALVA OKLAHOMA.  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 363...



DISCUSSION...ELEVATED CLUSTER OF TSTMS IS EXPECTED TO BECOME

PROGRESSIVELY SURFACE-BASED THIS AFTERNOON AS BOUNDARY LAYER

WARMS/DESTABILIZES.  THE COMBINATION OF MODERATE INSTABILITY AND

STRENGTHENING VERTICAL SHEAR SHOULD SERVE TO MAINTAIN COMPLEX WITH

THE POTENTIAL FOR EMBEDDED SUPERCELL AND/OR BOWING STRUCTURES

CAPABLE OF HAIL AND DAMAGING WIND GUSTS.



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 24035.





...MEAD/THOMPSON

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