

039 

WWUS20 KWNS 101916

SEL5

SPC WW 101916

OKZ000-TXZ000-110300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 365

NWS STORM PREDICTION CENTER NORMAN OK

215 PM CDT WED JUN 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTH CENTRAL OKLAHOMA

       NORTHWEST AND NORTH CENTRAL TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 215 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 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES SOUTHWEST

OF CHILDRESS TEXAS TO 45 MILES EAST SOUTHEAST OF DURANT OKLAHOMA.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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...WW 364...



DISCUSSION...SEVERAL THUNDERSTORM CLUSTERS ARE ONGOING FROM CENTRAL

OK SWWD INTO NW TX...WITH ADDITIONAL DEVELOPMENT EXPECTED EWD ACROSS

N TX/SRN OK THROUGH THE AFTERNOON/EVENING.  THE CONVECTION WILL BE

SUPPORTED BY A MID LEVEL SHORTWAVE TROUGH THAT IS EJECTING NEWD OVER

THE TX PANHANDLE...AS WELL AS SURFACE HEATING OF A MOIST AND

STRONGLY UNSTABLE ENVIRONMENT TO THE S OF THE THICKER CLOUD COVER.

MLCAPE NEAR 3000 J/KG AND EFFECTIVE BULK SHEAR OF 35-45 KT WILL

SUPPORT ORGANIZED CLUSTERS AND EMBEDDED SUPERCELLS CAPABLE OF

PRODUCING LARGE HAIL AND DAMAGING WINDS.



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 550. MEAN STORM

MOTION VECTOR 26030.





...THOMPSON

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