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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 72

NWS STORM PREDICTION CENTER NORMAN OK

1220 PM CDT SUN MAR 31 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       A LARGE PART OF LOUISIANA

       WESTERN AND SOUTHERN MISSISSIPPI

       SOUTHEAST TEXAS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 1220 PM UNTIL

800 PM CDT.



HAIL TO 1.5 INCHES 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 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST

OF LUFKIN TEXAS TO 45 MILES EAST SOUTHEAST OF JACKSON

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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...THIS SEVERE THUNDERSTORM WATCH REPLACES

SEVERE THUNDERSTORM WATCH NUMBER 71. WATCH NUMBER 71 WILL NOT BE

IN EFFECT AFTER 1220 PM CDT.



DISCUSSION...E TX/LA SQLN EXPECTED TO CONTINUE ESE AT ABOUT 35 KTS.

RELATIVELY HIGH PW...EXISTING SYSTEM ORGANIZATION...AND SFC HEATING

AHEAD OF MCS EXPECTED TO MAINTAIN RISK FOR EMBEDDED BOWING SEGMENTS

WITH DMGG WIND AND POSSIBLY SVR HAIL DESPITE FAIRLY MODEST DEEP

SHEAR. AN ISOLD/BRIEF TORNADO OR TWO CANNOT BE RULED OUT IN

ASSOCIATION WITH LEWP STRUCTURES GIVEN 35 KT WSWLY LLJ AND

INCREASING LOW-LVL BUOYANCY.



AVIATION...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 30035.





...CORFIDI

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