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WWUS20 KWNS 160851

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SPC WW 160851

LAZ000-MSZ000-CWZ000-161600-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 888

NWS STORM PREDICTION CENTER NORMAN OK

250 AM CST WED NOV 16 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEASTERN LOUISIANA

       FAR SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY MORNING FROM 250 AM UNTIL 1000 AM CST.



TORNADOES...HAIL TO 0.5 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 60 STATUTE

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

SLIDELL LOUISIANA TO 45 MILES WEST SOUTHWEST OF BOOTHVILLE

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 887...



DISCUSSION...TSTMS MAY INCREASE IN COVERAGE/STRENGTH OVER SE LA OVER

THE NEXT SEVERAL HOURS AS VEERING OF LOW LVL FLOW FARTHER W ENHANCES

LOW LVL CONVERGENCE BENEATH WRN-MOST PORTION OF EJECTING UPR

IMPULSE.  STRENGTH OF SFC SSWLY FLOW OVER AND S OF WW AREA /PER SFC

DATA/...QUALITY OF MOISTURE...AND STRENGTH OF DEEP WIND FIELD

SUGGEST POSSIBILITY FOR SUSTAINED SUPERCELLS WITH LOW LVL

MESOCYCLONES/TORNADOES.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

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

450. MEAN STORM MOTION VECTOR 22035.





...CORFIDI

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