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034 

WWUS20 KWNS 312042

SEL5

SPC WW 312042

LAZ000-MSZ000-CWZ000-010100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 75

NWS STORM PREDICTION CENTER NORMAN OK

320 PM CDT SUN MAR 31 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST LOUISIANA

       SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 320 PM UNTIL 800

PM CDT.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES NORTHEAST

OF GULFPORT MISSISSIPPI TO 35 MILES WEST NORTHWEST OF HOUMA

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 72...WW 73...WW 74...



DISCUSSION...MODEST WNWLY DEEP SHEAR AND STRENGTH OF ASSOCIATED COLD

POOL SUGGEST THAT SW MS/S CNTRL LA SQLN WILL CONTINUE ESE THROUGH

INCREASINGLY WARM/MOIST CONFLUENT LOW-LVL FLOW OVER SE LA/SRN MS.

MERGING OF SQLN WITH ISOLD CELLS FORMING AHEAD OF IT MAY SUPPORT

TEMPORARY STRENGTHENING OF THE CONVECTIVE BAND...AND AN ATTENDANT

RISK FOR DMGG WIND.



AVIATION...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 500. MEAN STORM MOTION

VECTOR 30030.





...CORFIDI

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