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472 

WWUS20 KWNS 122238

SEL6

SPC WW 122238

NMZ000-TXZ000-130400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 306

NWS STORM PREDICTION CENTER NORMAN OK

540 PM CDT SAT JUN 12 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF SOUTHEAST NEW MEXICO

       PARTS OF SOUTHWEST TEXAS



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 540 PM UNTIL

1100 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 60

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

NORTHEAST OF CANNON AFB NEW MEXICO TO 40 MILES WEST SOUTHWEST OF

DRYDEN TEXAS.  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...CONTINUE...WW 301...WW 302...WW

303...WW 304...WW 305...



DISCUSSION...SCATTERED THUNDERSTORMS WILL DEVELOP VICINITY N/S DRY

LINE NEAR THE  TX/NM BORDER.  AIR MASS E OF LINE IS VERY UNSTABLE

WITH MLCAPES AOA 3000 J/KG.  GIVEN 25-35 KT OF SHEAR AND STEEP LAPSE

RATES...SEVERE THUNDERSTORMS ARE LIKELY WITH LOCAL DAMAGING

DOWNBURST WINDS AND LARGE HAIL.



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 600. MEAN STORM

MOTION VECTOR 20020.





...HALES

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