WWUS20 KWNS 251518
SEL4
SPC WW 251518
LAZ000-TXZ000-CWZ000-252200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 694
NWS STORM PREDICTION CENTER NORMAN OK
920 AM CST TUE DEC 25 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTH-CENTRAL AND SOUTHWESTERN LOUISIANA
       SOUTHEAST TEXAS
       COASTAL WATERS

EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 920 AM UNTIL
400 PM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST OF
HUNTSVILLE TEXAS TO 15 MILES NORTHEAST OF LAFAYETTE LOUISIANA. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 692...WW 693...

DISCUSSION...SFC-BASED SUPERCELL/TORNADO THREAT FCST TO INCREASE AND
SHIFT EWD ACROSS WW AREA THROUGH AFTN.  WARM SECTOR EXPECTED TO
SHIFTS FARTHER INLAND AND BECOMES OVERLAIN BY STRENGTHENING
MID-UPPER FLOW AND ASCENT...PER SPC MESOSCALE DISCUSSION 2207. 
POTENTIAL EXISTS FOR LARGE HAIL AND A FEW STG/DAMAGING TORNADOES
WITH ANY SUSTAINED/DISCRETE SUPERCELLS.  BOW-ECHO/QLCS CIRCULATIONS
ALSO MAY BECOME TORNADIC...IN ADDITION TO SVR GUST POTENTIAL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25040.


...EDWARDS