

007 

WWUS20 KWNS 241643

SEL8

SPC WW 241643

ALZ000-LAZ000-MSZ000-CWZ000-250000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 808

NWS STORM PREDICTION CENTER NORMAN OK

1040 AM CST THU DEC 24 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SMALL PART OF SOUTHWEST ALABAMA

       MUCH OF SOUTHEAST LOUISIANA

       MUCH OF CENTRAL AND SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING AND EVENING FROM 1040 AM UNTIL

600 PM CST.



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

TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 75 MILES NORTH NORTHEAST OF

JACKSON MISSISSIPPI TO 10 MILES EAST SOUTHEAST OF BOOTHVILLE

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 807...



DISCUSSION...WELL DEVELOPED SQUALL LINE N/S FROM NEAR NERN LA/MS

BORDER SWD INTO GULF WITH EMBEDDED SUPERCELLS WILL CONTINUE EWD

AHEAD OF STRONG UPPER SYSTEM APPROACHING FROM TX.  WITH THE 100KT

MID LVL WIND MAX ROTATING NEWD ACROSS LWR MS VALLEY THIS

AFTERNOON...CONDITIONS WILL REMAIN VERY FAVORABLE FOR TORNADIC

SUPERCELLS WITHIN THE SQUALL LINE AS WELL AS ANY DESCRETE STORMS

AHEAD OF LINE PARTICULARLY SRN PORTION OF WATCH WHERE MORE UNSTABLE

AIR MASS WILL BE AVAILABLE.  IN ADDITION INCREASING THREAT OF

DAMAGING WINDS ASSOCIATED WITH THE SQUALL LINE AS JET MAX MOVES

ACROSS AREA DURING AFTERNOON.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 23040.





...HALES

