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747 

WWUS20 KWNS 121209

SEL0

SPC WW 121209

LAZ000-MSZ000-TXZ000-CWZ000-121900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 380

NWS STORM PREDICTION CENTER NORMAN OK

705 AM CDT TUE JUN 12 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN LOUISIANA

       SOUTHWEST MISSISSIPPI

       SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 705 AM UNTIL

200 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 65

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

NORTHEAST OF NEW ORLEANS LOUISIANA TO 55 MILES NORTHWEST OF PORT

ARTHUR TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 379...



DISCUSSION...OVERNIGHT MCS HAS LEFT AN ELONGATED W-E COLD POOL

ACROSS NRN LA. ASSOCIATED GUST FRONT LIKELY WILL CONTINUE TO SERVE

AS THE FOCUS FOR STRONG TO SVR TSTMS THROUGH AT LEAST MIDDAY AS THE

BOUNDARY EDGES SWD INTO MODEST BUT VERY MOIST SLY LOW LVL FLOW.

COUPLED WITH CONTINUING PRESENCE OF DEEP EML ABOVE THE MOIST

LAYER...SETUP MAY YIELD ADDITIONAL EPISODES OF BOWING WITH WET

MICROBURSTS/LOCALLY DMGG WIND.



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 550. MEAN STORM

MOTION VECTOR 33020.





...CORFIDI

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