

000 

WWUS20 KWNS 310026

SEL1

SPC WW 310026

TXZ000-310500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 311

NWS STORM PREDICTION CENTER NORMAN OK

725 PM CDT WED MAY 30 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL TEXAS



EFFECTIVE THIS WEDNESDAY NIGHT FROM 725 PM UNTIL MIDNIGHT 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES WEST

NORTHWEST OF MINERAL WELLS TEXAS TO 15 MILES SOUTH SOUTHEAST OF

JUNCTION TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



DISCUSSION...STRONG INSTABILITY AND WEAK CAPPING IS SUPPORTING

THUNDERSTORM DEVELOPMENT NEAR SURFACE COLD FRONT/OUTFLOW BOUNDARY

NEAR ABI EARLY THIS EVENING.  OTHER STORMS MAY FORM INVOF LOW CENTER

AROUND JCT AND NEAR NUMEROUS OTHER SURFACE BOUNDARIES ACROSS THE

EDWARDS PLATEAU.  SHEAR WILL BE SUFFICIENT FOR SUPERCELLS AND

ORGANIZED LINES/CLUSTERS AS STORMS FORM.  LARGE HAIL AND DAMAGING

WINDS EXPECTED TO ACCOMPANY STRONGER STORMS THROUGH THE EVENING.



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 500. MEAN STORM

MOTION VECTOR 30015.





...EVANS



000 

WWUS20 KWNS 310026

SEL1

SPC WW 310026

TXZ000-310500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 311...RESENT

NWS STORM PREDICTION CENTER NORMAN OK

725 PM CDT WED MAY 30 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL TEXAS



EFFECTIVE THIS WEDNESDAY NIGHT FROM 725 PM UNTIL MIDNIGHT 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES WEST

NORTHWEST OF MINERAL WELLS TEXAS TO 15 MILES SOUTH SOUTHEAST OF

JUNCTION TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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.



DISCUSSION...STRONG INSTABILITY AND WEAK CAPPING IS SUPPORTING

THUNDERSTORM DEVELOPMENT NEAR SURFACE COLD FRONT/OUTFLOW BOUNDARY

NEAR ABI EARLY THIS EVENING.  OTHER STORMS MAY FORM INVOF LOW CENTER

AROUND JCT AND NEAR NUMEROUS OTHER SURFACE BOUNDARIES ACROSS THE

EDWARDS PLATEAU.  SHEAR WILL BE SUFFICIENT FOR SUPERCELLS AND

ORGANIZED LINES/CLUSTERS AS STORMS FORM.  LARGE HAIL AND DAMAGING

WINDS EXPECTED TO ACCOMPANY STRONGER STORMS THROUGH THE EVENING.



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 500. MEAN STORM

MOTION VECTOR 30015.





...EVANS

