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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 142

NWS STORM PREDICTION CENTER NORMAN OK

355 AM CDT THU APR 5 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEASTERN LOUISIANA

       SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING FROM 355 AM UNTIL 1100 AM CDT.



TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 105 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF SLIDELL

LOUISIANA TO 30 MILES SOUTH OF HOUMA LOUISIANA.  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 141...



DISCUSSION...TSTMS...INCLUDING A FEW SUPERCELLS...EXPECTED TO

CONTINUE FORMING IN ZONE OF LOW LVL WAA/MOISTURE TRANSPORT ON

BACKSIDE OF RETREATING MESOHIGH AND IN SRN PART OF VORT LOBE MOVING

THROUGH BASE OF AR UPR LOW.  WEAK SFC FLOW SUGGESTS THAT SETUP IS

MOST FAVORABLE FOR LARGE HAIL...ESPECIALLY WITH ANY LONGER-LIVED

DISCRETE STORMS IN SRN HALF OF WW.  BUT RETREATING COOL DOME IS VERY

SHALLOW...AND MODERATE...VERY MOIST SW FLOW IS PRESENT JUST OFF THE

SFC ACROSS SRN LA.  AS FLOW AND FORCING STRENGTHEN LATER THIS

MORNING...POTENTIAL ALSO WILL EXIST FOR A TORNADO OR

TWO...ESPECIALLY NEAR OUTFLOW BOUNDARY REMNANT IN SE LA.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 26030.





...CORFIDI

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