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WWUS20 KWNS 041018

SEL2

SPC WW 041018

ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-042100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 832

NWS STORM PREDICTION CENTER NORMAN OK

505 AM CDT SUN SEP 4 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ALABAMA

       THE WESTERN HALF OF THE FLORIDA PANHANDLE

       SOUTHEAST LOUISIANA

       SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS SUNDAY MORNING AND AFTERNOON FROM 505 AM UNTIL 400

PM CDT.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTH SOUTHWEST OF

BATON ROUGE LOUISIANA TO 30 MILES EAST NORTHEAST OF CRESTVIEW

FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 830...WW 831...



DISCUSSION...T.S. LEE APPEARS TO BE ELONGATING ATTM AS AN APPARENT

MID LVL VORT MAX CONTINUES TO MOVE ESE INTO SRN QUADRANT OF SYSTEM.

THIS DEVELOPMENT...PLUS GFS/ECMWF MODEL FCSTS SHOWING LOW LVL

CIRCULATION REMAINING MORE OR LESS STNRY NEAR THE CNTRL LA CST...

SUGGESTS THAT THE CORRIDOR OF HIGHEST THETA-E AIR WILL CONTINUE TO

SPREAD SLOWLY NNW FROM THE GPT/MOB AREA TOWARD/INTO CNTRL MS LATER

TODAY.  AT THE SAME TIME...MID LVL DRY SLOT ASSOCIATED WITH THE UPR

VORT WILL ROTATE FARTHER NNE ACROSS SE LA...SE MS...AND SW AL.

GIVEN CONTINUING PRESENCE OF STRONG LOW LVL WIND FIELD WITH SIZABLE

LOW LVL DIRECTIONAL SHEAR...SETUP COULD BECOME INCREASINGLY

FAVORABLE FOR SCTD SUPERCELLS WITH LOW LVL MESOCYCLONES/TORNADOES.

FARTHER E...A SQLN WITH EMBEDDED LEWPS HAS EVOLVED OVER THE WRN FL

PANHANDLE SWD INTO THE GULF...ALONG THE LEADING EDGE OF THE STRONGER

LOW LVL WIND FIELD ASSOCIATED WITH T.S LEE.  SUFFICIENT

SHEAR/MOISTURE MAY PERSIST TO SUPPORT A THREAT FOR LOCALLY DMGG WIND

AND POSSIBLY AN ISOLD TORNADO WITH THIS ACTIVITY THROUGH LATER THIS

MORNING.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 16035.





...CORFIDI

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