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WWUS20 KWNS 051456

SEL9

SPC WW 051456

ALZ000-LAZ000-MSZ000-CWZ000-052200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 39

NWS STORM PREDICTION CENTER NORMAN OK

855 AM CST SAT MAR 5 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF SOUTHWEST ALABAMA

       LARGE PART OF SOUTHERN LOUISIANA

       PARTS OF SOUTHEAST MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 855 AM UNTIL

400 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 75 STATUTE

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

INTRACOASTAL CITY LOUISIANA TO 35 MILES EAST OF MOBILE ALABAMA.

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...THUNDERSTORMS ARE INTENSIFYING ACROSS SCENTRAL LA AHEAD

OF TROUGH MOVING EWD ACROSS TX.  AIR MASS EWD ACROSS THE WATCH AREA

IS MOIST AND MDTLY UNSTABLE WITH MLCAPES TO 1000 J/KG.  SHEAR

PROFILES WILL BE INCREASING WITH TIME AS THE TROUGH APPROACHES AND

CONDITIONS ARE ALREADY FAVORABLE FOR SUPERCELLS AS EVIDENT BY THE

STORMS E OF LCH CURRENTLY.  TORNADOES WILL BE POSSIBLE ASSOCIATED

WITH ANY SUPERCELL WITH ACTIVITY DEVELOPING UPSCALE INTO A QLCS BY

THIS AFTERNOON TOWARD SERN MS/SWRN AL.



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

500. MEAN STORM MOTION VECTOR 24030.





...HALES

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