

000 

WWUS20 KWNS 311156

SEL9

SPC WW 311156

LAZ000-TXZ000-CWZ000-311900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 29

NWS STORM PREDICTION CENTER NORMAN OK

550 AM CST THU JAN 31 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST AND SOUTH CENTRAL LOUISIANA

       SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 550 AM UNTIL

100 PM CST.



TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE

MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHEAST OF

LAKE CHARLES LOUISIANA TO 35 MILES SOUTHEAST OF GALVESTON TEXAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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.



DISCUSSION...TSTMS EXPECTED TO INCREASE IN NUMBER AND STRENGTH IN

WAA ZONE INVOF NW GULF OF MEXICO SFC WAVE.  OTHER STORMS EXPECTED TO

INTENSIFY FARTHER NW ALONG LEADING EDGE OF ASCENT ASSOCIATED WITH

STRONG TX PANHANDLE UPR VORT.  VERY SHALLOW LAYER OF POLAR AIR NOW

OVER WW REGION EXPECTED TO ERODE STEADILY NWD THROUGH

MIDDAY...INCREASING CHANCES THAT STORMS IN THE NW GULF AND SE TX

WILL BECOME MORE NEARLY SFC-BASED AS THEY MOVE/DEVELOP NE INTO LA.

GIVEN STRENGTH OF WIND FIELD AND CONSIDERABLE SPEED/DIRECTIONAL

SHEAR...RESULTING SUPERCELLS COULD PRODUCE TORNADOES IN ADDITION TO

HIGH WIND AND HAIL.



AVIATION...TORNADOES AND 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

400. MEAN STORM MOTION VECTOR 22040.





...CORFIDI

