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936 

WWUS20 KWNS 102132

SEL2

SPC WW 102132

LAZ000-TXZ000-CWZ000-110500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 572

NWS STORM PREDICTION CENTER NORMAN OK

430 PM CDT FRI AUG 10 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST LOUISIANA

       SOUTH CENTRAL AND SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS FRIDAY AFTERNOON FROM 430 PM UNTIL MIDNIGHT CDT.



HAIL TO 1 INCH 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 EITHER SIDE OF A LINE FROM 15 MILES WEST SOUTHWEST

OF SAN ANTONIO TEXAS TO 60 MILES EAST NORTHEAST OF LAKE CHARLES

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 571...



DISCUSSION...TSTMS EXPECTED TO CONTINUE FORMING ALONG W-E FRONT

DRIFTING SLOWLY S ACROSS PARTS OF TX AND LA...WHERE VERY STEEP LOW

LVL LAPSE RATES/DEEPLY MIXED BOUNDARY LAYER IN CONJUNCTION WITH HIGH

PW MAY FOSTER WET MICROBURSTS. UPR LVL WINDS ARE WEAKER ACROSS

REGION RELATIVE TO YESTERDAY...BUT STILL SUFFICIENT FOR POSSIBLE

UPSCALE GROWTH INTO A SMALL SWD-MOVING CLUSTER OR TWO.  SUSTAINED

ACTIVITY ALSO MAY BE FOSTERED BY PRESENCE OF A MORE MOIST MID LVL

ENVIRONMENT RELATIVE TO YESTERDAY.

THE 20Z CONVECTIVE OUTLOOK WILL BE AMENDED TO INCLUDE 15% WIND

PROBABILITIES IN THE WW REGION.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION

VECTOR 34020.





...CORFIDI

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