

623 

WWUS20 KWNS 260703

SEL8

SPC WW 260703

TXZ000-CWZ000-261400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 378

NWS STORM PREDICTION CENTER NORMAN OK

205 AM CDT THU MAY 26 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       THE MIDDLE TEXAS GULF COAST

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING FROM 205 AM UNTIL 900 AM CDT.



HAIL TO 3 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 55

STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH

NORTHWEST OF VICTORIA TEXAS TO 40 MILES SOUTHEAST OF PALACIOS

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 376...WW 377...



DISCUSSION...A SMALL MCS HAS DEVELOPED ALONG W-E FRONT SAGGING

SLOWLY SWD ACROSS THE MIDDLE TX GULF CSTL PLN.  COMBINATION OF DEEP

EML ATOP LAYER OF VERY RICH GULF INFLOW /WITH LOW LVL SLY FLOW OF

15-20 KTS/...AND GLANCING INFLUENCE OF VORT LOBE ROTATING AROUND

BASE OF DEEP MID WESTERN TROUGH SUGGEST THAT VERY STRONG UPDRAFTS

MAY PERSIST.  POTENTIAL ALSO WILL EXIST FOR

BACK-BUILDING/REGENERATIVE DEVELOPMENT WWD ALONG THE FRONT...POSING

FURTHER RISK OF VERY LARGE HAIL AND LOCALLY DMGG WIND.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 33020.





...CORFIDI

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