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WWUS20 KWNS 251358

SEL5

SPC WW 251358

LAZ000-TXZ000-CWZ000-252100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 15

NWS STORM PREDICTION CENTER NORMAN OK

755 AM CST WED JAN 25 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND SOUTHERN LOUISIANA

       SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 755 AM UNTIL

300 PM CST.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

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



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF NATCHITOCHES

LOUISIANA TO 30 MILES SOUTH SOUTHWEST OF PORT ARTHUR TEXAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 14...



DISCUSSION...NRN PARTS OF E TX SQLN EXPECTED TO CONTINUE ENEWD INTO

RECOVERING BOUNDARY LAYER ENVIRONMENT NEAR DIFFUSE WNW-ESE WARM

FRONT NOW EXTENDING FROM N OF LUFKIN TX TO NEAR BATON ROUGE LA.

AREA VWP DATA SHOW 50+ KT SSWLY LLJ SHIFTING EWD IN TANDEM WITH

SQLN...ENHANCING LOW LVL SHEAR AND STRENGTHENING LOW LVL MOISTURE

TRANSPORT.  WHILE MID LVL LAPSE RATES WILL REMAIN WEAK...COMBINATION

OF INCREASING LOW LVL MOISTURE/SHEAR AND MODEST SFC HEATING MAY

YIELD AN ENVIRONMENT FAVORABLE FOR LEWPS WITH LOCALLY DMGG WIND AND

ISOLD TORNADOES.  OTHER STORMS MAY ARISE LATER THIS MORNING OR EARLY

THIS AFTN WITHIN CONFLUENCE BAND NOW OVER THE HOUSTON AREA AHEAD OF

SQLN. ANY SUSTAINED STORMS FORMING WITH THIS ACTIVITY MAY POSE A

TORNADO THREAT LATER TODAY OVER SW LA.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 21035.





...CORFIDI

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