SPC AC 240100      STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK    DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS.      VALID 240100Z - 241200Z    THERE IS A HIGH RISK OF SVR TSTMS OVER PORTIONS OF SRN AND ERN    TX...MUCH OF LA...AND SWRN MS TO THE RIGHT OF A LINE FROM    25 ESE PSX 35 NNW NIR 35 SSW AUS 35 WSW CLL 30 NNE LFK 55 E MLU    30 NNE MCB 35 WSW HUM.      SURROUNDING THE HIGH RISK THERE IS A MDT RISK OF SVR TSTMS FROM S    CENTRAL TX THROUGH LA INTO CNTRL AND SRN MS TO THE RIGHT OF A LINE    FROM 30 SSW PSX 25 W NIR 35 SSE SAT 25 WNW AUS 60 E ACT 35 W MLU    30 NNE GWO 25 WSW CBM MEI 30 SE BVE.    THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM    20 E CRP 45 W ALI 30 NW SAT 50 WNW TPL 10 SSW FTW 25 N SHV    20 WSW UOX 30 ENE TUP 25 SSW TCL 40 SSE MOB.    GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 50 SW TUS PHX    45 ESE SOW 35 NNE CNM 50 E BGS 40 NNW FTW 15 S FSM 35 NE UNO MDH    OWB CSV ABY AQQ.    ...CENTRAL AND ERN TX INTO LWR MS VALLEY...    THE THREAT OF SIGIFICANT SEVERE WEATHER IS EXPECTED TO CONTINUE    OVERNIGHT...      UPPER SYSTEM OVER NRN MEXICO AND THE SWRN U.S. CONTINUES TO MOVE    EWD WITH SEVERAL MINOR SHORTWAVE TROUGHS MOVING NEWD INTO S CENTRAL    U.S. STRONG TO SEVERE STORMS WITH OCCASIONAL SUPERCELLS CONTINUE    IN WARM ADVECTION ZONE FROM ERN TX EWD INTO LA AND THIS ACTIVITY IS    EXPECTED TO DEVELOP EWD INTO MS DURING THE NEXT FEW HOURS. A NEW    NORTH/SOUTH BAND OF THUNDERSTORMS WITH ISOLATED STRONG SUPERCELLS    AND SOME BOWING SEGMENTS HAS DEVELOPED OVER CENTRAL AND S CENTRAL    TEXAS AND IS MOVING EWD ABOUT 40 TO 50 KT. THIS BAND APPEARS TO BE    ASSOCIATED WITH STRONGER DYNAMICS AND COOLING ALOFT MOVING INTO    AREA. AIR MASS IN WARM SECTOR IS VERY MOIST FOR THIS TIME OF YEAR    AND SBCAPE VALUES OF GREATER THAN 3000 J/KG EXTEND FROM S CENTRAL    TX ENEWD INTO SWRN LA. THE WARM SECTOR SHOULD MOVE NORTH INTO SERN    LA AND SRN MS WITH TIME. THE FORCING FROM THE W IS EXPECTED TO    RESULT IN SQUALL LINE AND BOW ECHO DEVELOPMENT WITH THE NORTH/SOUTH    BAND MOVING EWD FROM S CENTRAL TX. THIS LINE IS EXPECTED TO MOVE    ENEWD THROUGH THE WARM SECTOR DURING THE NIGHT...REACHING MS AND    SERN LA BY END OF PERIOD. HODOGRAPHS FAVOR THE DEVELOPMENT OF    SUPERCELLS WITHIN AND AHEAD OF THE SQUALL LINE.      GIVEN THE STRENGTH AND NATURE OF WIND FIELDS AND THE STRONG    INSTABILITY PRESENT THE RISK OF SIGNIFICANT DAMAGING WINDS WITH THE    SQUALL LINE AND ISOLATED STRONG TORNADOES WITH THE SUPERCELLS    THROUGHOUT REMAINDER OF FORECAST PERIOD.    ..JOHNS/CORFIDI.. 12/24/02       NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 0600Z