

000 

WWUS20 KWNS 311838

SEL0

SPC WW 311838

LAZ000-MSZ000-CWZ000-010100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 30

NWS STORM PREDICTION CENTER NORMAN OK

1235 PM CST THU JAN 31 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       LARGE PART OF SOUTHERN LOUISIANA

       PARTS OF SOUTHEASTERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1235 PM UNTIL

700 PM CST.



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

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



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTH NORTHWEST OF

INTRACOASTAL CITY LOUISIANA TO 40 MILES EAST OF GULFPORT

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 29. WATCH NUMBER 29 WILL NOT BE IN EFFECT AFTER 1235

PM CST.



DISCUSSION...SQUALL LINE SWRN MS INTO SWRN LA CONTINUES EWD. WARM

FRONT HAS MOVED INLAND AHEAD OF THE LINE ACROSS SERN LA AND EXPECTED

TO MOVE ONSHORE SERN MS PRIOR TO THE LINE PASSAGE LATER THIS

AFTERNOON.  STRONG SHEAR PROFILES AND MLCAPES TO AROUND 1000 J/KG IN

WARM SECTOR SUPPORT DEVELOPMENT OF SUPERCELLS BOTH EMBEDDED AND JUST

AHEAD OF THE SQUALL LINE.  IN ADDITION TO WIND DAMAGE...TORNADOS

WILL BE POSSIBLE WITH ANY ROTATING UPDRAFT.



AVIATION...TORNADOES AND 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 450.

MEAN STORM MOTION VECTOR 24035.





...HALES

