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000 

WWUS20 KWNS 032337

SEL2

SPC WW 032337

LAZ000-TXZ000-040500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 802

NWS STORM PREDICTION CENTER NORMAN OK

635 PM CDT SUN AUG 3 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHWEST LOUISIANA

       EAST CENTRAL AND NORTHEAST TEXAS



EFFECTIVE THIS SUNDAY NIGHT FROM 635 PM UNTIL MIDNIGHT CDT.



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 115

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH OF

SHREVEPORT LOUISIANA TO 40 MILES SOUTH SOUTHEAST OF CORSICANA

TEXAS.  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 801...



DISCUSSION...TSTMS NOW OVER THE TX PINEY WOODS EXPECTED TO PROPAGATE

MAINLY NNW INTO DEEPLY MIXED LOW LVL ENVIRONMENT OVER NE TX...WHILE

MODERATE UNIDIRECTIONAL NE FLOW ALOFT MOVES INDIVIDUAL CELLS SWWD.

RICH MOISTURE AVAILABILITY AND STEEP LOW LVL LAPSE RATES LIKELY TO

CONTINUE TO POSE A THREAT FOR WET MICROBURSTS AND MARGINALLY SVR

HAIL AS AMALGAMATING COLD POOLS ALLOW STORMS TO BECOME BETTER

ORGANIZED/SUSTAINED.



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 500. MEAN STORM

MOTION VECTOR 08020.





...CORFIDI

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