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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 263

NWS STORM PREDICTION CENTER NORMAN OK

325 PM CDT MON MAY 7 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHWEST TEXAS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 325 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 85

STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES SOUTHWEST OF

HONDO TEXAS TO 30 MILES NORTH OF WACO TEXAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU3).



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 261...WW 262...



DISCUSSION...SEVERE TSTMS IN PROGRESS OVER THE CONCHO VALLEY ARE

EXPECTED TO MOVE ESEWD INTO THE AREA LATE THIS AFTERNOON WITH

ADDITIONAL SEVERE STORMS EXPECTED TO CROSS THE INTERNATIONAL BORDER

INTO THE EDWARDS PLATEAU THIS EVENING.  AIR MASS ACROSS THE WATCH

AREA IS HOT AND QUITE MOIST WITH MLCAPE VALUES UPWARDS OF 2500-3500

J/KG.  WHILE REGION WILL REMAIN ON THE ERN FRINGE OF STRONGER SWLY

MIDLEVEL FLOW ALOFT...THE DEGREE OF INSTABILITY WILL PROMOTE

ORGANIZED UPDRAFTS/POSSIBLE SUPERCELLS CAPABLE OF DAMAGING 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 550. MEAN STORM

MOTION VECTOR 31025.





...MEAD

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