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000 

WWUS20 KWNS 220254

SEL2

SPC WW 220254

LAZ000-MSZ000-TXZ000-CWZ000-221000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 72

NWS STORM PREDICTION CENTER NORMAN OK

855 PM CST THU FEB 21 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       MUCH OF SOUTHERN LOUISIANA

       PARTS OF SOUTHEAST MISSISSIPPI

       SMALL PART OF SOUTHEAST TEXAS

       COASTAL WATERS



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 855 PM

UNTIL 400 AM CST.



TORNADOES...HAIL TO 2 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 115 STATUTE

MILES EAST AND WEST OF A LINE FROM 70 MILES SOUTHWEST OF

INTRACOASTAL CITY LOUISIANA TO 10 MILES NORTH NORTHEAST OF

NATCHEZ MISSISSIPPI.  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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 70. WATCH NUMBER 70 WILL NOT BE IN EFFECT AFTER 855

PM CST. CONTINUE...WW 71...



DISCUSSION...SEVERE THUNDERSTORMS EXPECTED TO CONTINUE DEVELOPING

AHEAD OF COLD FRONT ACROSS WATCH AREA MUCH OF NIGHT.  WITH APPROACH

OF UPPER TROUGH SHEAR PROFILES WILL SUPPORT SUPERCELLS AS LOW LEVEL

JET INCREASES TO 30-40KT.  IN ADDITION TO LARGE HAIL/TORNADOES WILL

BE POSSIBLE WITH ANY SUPERCELL BOTH ALONG AND TO S OF E/W FRONTAL

ZONE WHICH EXTENDS EWD INTO SERN MS.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

450. MEAN STORM MOTION VECTOR 24035.





...HALES

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