

526 

WWUS20 KWNS 252240

SEL4

SPC WW 252240

LAZ000-TXZ000-260600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 64

NWS STORM PREDICTION CENTER NORMAN OK

540 PM CDT WED MAR 25 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL LOUISIANA

       EASTERN TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 540

PM UNTIL 100 AM CDT.



TORNADOES...HAIL TO 2 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 70 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST OF LUFKIN

TEXAS TO 60 MILES NORTH NORTHEAST OF ALEXANDRIA 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 62...WW 63...



DISCUSSION...THREAT FOR SEVERE THUNDERSTORMS...INCLUDING LONG-LIVED

SUPERCELLS/BOW ECHOES...WILL INCREASE ACROSS WW THROUGH THE EVENING.

 SURFACE FRONT WILL LIKELY SHIFT SLOWLY NWD INTO NRN LA AS STRONG

SSWLY LLJ DEVELOPS AND SHIFTS TOWARDS THE LOWER MS RIVER VALLEY...

ALLOWING SUFFICIENT SURFACE-BASED INSTABILITY TO OVERSPREAD MUCH OF

THE WATCH.  VERY STRONG LOW LEVEL SHEAR WILL REMAIN SUPPORTIVE OF

TORNADOES...ALTHOUGH DAMAGING WINDS AND LARGE HAIL ARE ALSO LIKELY

WITH THE STRONGER CORES.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 27035.





...EVANS

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