WWUS20 KWNS 050855
SEL2
SPC WW 050855
LAZ000-MSZ000-CWZ000-051600-

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