

000 

WWUS20 KWNS 310323

SEL7

SPC WW 310323

ARZ000-LAZ000-TXZ000-311100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 97

NWS STORM PREDICTION CENTER NORMAN OK

1025 PM CDT FRI MAR 30 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST ARKANSAS

       NORTHWEST LOUISIANA

       NORTHEAST TEXAS



EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1025 PM

UNTIL 600 AM CDT.



HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60

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 30 MILES NORTHEAST OF

TEXARKANA ARKANSAS TO 25 MILES SOUTH OF TYLER TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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 95...WW 96...



DISCUSSION...GLANCING INFLUENCE OF 50-60 KT MID LEVEL SPEED MAX

MOVING NE ACROSS WRN/CNTRL TX LIKELY TO MAINTAIN SOME DEGREE OF

ORGANIZATION WITH QLCS NOW OVER NE TX.  ASSOCIATED LEWPS/LOW

AMPLITUDE BOWS MAY CONTINUE TO YIELD ISOLATED DAMAGING WIND GUSTS

AND POSSIBLY A BRIEF TORNADO THROUGH EARLY SATURDAY DESPITE MARGINAL

SFC-BASED CAPE.



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

TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50

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

MOTION VECTOR 24035.





...CORFIDI

