

000 

WWUS20 KWNS 250155

SEL3

SPC WW 250155

ALZ000-LAZ000-MSZ000-TNZ000-250900-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 33

NWS STORM PREDICTION CENTER NORMAN OK

755 PM CST SAT FEB 24 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND NORTHERN ALABAMA

       NORTHEAST LOUISIANA

       MUCH OF MISSISSIPPI

       A SMALL PART OF SOUTHERN MIDDLE TENNESSEE



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 755 PM

UNTIL 300 AM 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 100 STATUTE

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

ALABAMA TO 45 MILES WEST SOUTHWEST OF PINE BELT MISSISSIPPI.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 32. WATCH NUMBER 32 WILL NOT BE IN EFFECT AFTER 755

PM CST.



DISCUSSION...SQLN WITH EMBEDDED SUPERCELLS SHOULD CONTINUE EWD AS

INDIVIDUAL STORMS MOVE NE AT 40-50 KTS BENEATH 70+ KT MID LEVEL SWLY

JET.  BEST CHANCE FOR SEMI-DISCRETE ACTIVITY WITH ASSOCIATED TORNADO

POTENTIAL IN THE NEXT 3-4 HRS SHOULD BE OVER SW/CNTRL MS...WHERE

GREATEST BOUNDARY LAYER MOISTURE IS PRESENT ON SRN END OF LINE.  NRN

PART OF SQLN MAY TRANSITION INTO MORE OF A FORCED ASCENT STRUCTURE

IN THE NEXT FEW HRS...WHERE EMBEDDED LEWPS MAY YIELD HIGH WIND AND

ISOLATED SPIN-UP TORNADOES.



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 450.

MEAN STORM MOTION VECTOR 23050.





...CORFIDI

