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609 

WWUS20 KWNS 022000

SEL7

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TXZ000-030300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 247

NWS STORM PREDICTION CENTER NORMAN OK

300 PM CDT WED JUN 2 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       LARGE PORTION OF CENTRAL AND SOUTHWEST TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 300 PM UNTIL

1000 PM CDT.



HAIL TO 2.5 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 115

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH

NORTHEAST OF ABILENE TEXAS TO 65 MILES SOUTHWEST OF HONDO TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 245...WW 246...



DISCUSSION...THE AIR MASS OVER THE WATCH AREA HAS BECOME VERY TO

EXTREMELY UNSTABLE WITH MLCAPES TO 4000 J/KG.  STEEP LAPSE RATES

ASSOCIATED WITH THE WEAK UPPER CIRCULATION OVER SOUTHWESTERN TX WILL

SUPPORT VERY LARGE HAIL AND DAMAGING DOWNBURSTS AS STORMS DEVELOP

RAPIDLY THRU THE AFTERNOON.  BY LATE AFTERNOON EXPECT A MORE

ORGANIZED COLD POOL TO DEVELOP AND MOVE SWD THRU THE INSTABILITY

AXIS WITH INCREASING THREAT OF A WIND DAMAGE THREAT.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 31015.





...HALES

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