

580 

WWUS20 KWNS 110357

SEL3

SPC WW 110357

TXZ000-CWZ000-110900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 13

NWS STORM PREDICTION CENTER NORMAN OK

1000 PM CST TUE FEB 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF SOUTH TEXAS

       COASTAL WATERS



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1000 PM

UNTIL 300 AM CST.



HAIL TO 1.5 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 95

STATUTE MILES EAST AND WEST OF A LINE FROM 85 MILES NORTHWEST OF

HOUSTON TEXAS TO 35 MILES EAST SOUTHEAST OF BEEVILLE 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 11...WW 12...



DISCUSSION...SQUALL LINE HAS EXTENDED SWD ALONG STRONG COLD FRONT

MOVING EWD ACROSS CENTRAL AND SRN TX. THE STRONG SURFACE CONVERGENCE

WILL ALLOW STORMS TO CONTINUE TO DEVELOP THROUGH THE SIGNIFICANT

INHIBITION. DAMAGING WINDS AND MARGINAL HAIL WILL BE ASSOCIATED WITH

THE LINE AS IT MOVES E/SEWD TOWARD TX COAST.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 27030.





...HALES

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