

858 

WWUS20 KWNS 300250

SEL5

SPC WW 300250

LAZ000-MSZ000-CWZ000-301000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 755

NWS STORM PREDICTION CENTER NORMAN OK

850 PM CST MON NOV 29 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF SOUTHERN LOUISIANA

       CENTRAL AND NORTHEAST MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 850 PM UNTIL

400 AM 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 75 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHWEST OF

COLUMBUS MISSISSIPPI TO 10 MILES SOUTHEAST OF INTRACOASTAL CITY

LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 753...TORNADO WATCH NUMBER 754. WATCH NUMBER 753 754

WILL NOT BE IN EFFECT AFTER 850 PM CST.



DISCUSSION...PRE-FRONTAL BAND OF SEVERE STORMS...WITH EMBEDDED

SUPERCELLS...WILL PERSIST INTO THE OVERNIGHT HOURS FROM SW/CENTRAL

LA NEWD ACROSS CENTRAL MS.  THE ENVIRONMENT REMAINS SUFFICIENTLY

UNSTABLE FOR SURFACE-BASED STORMS...AND LOW-LEVEL SHEAR IS MAXIMIZED

NEAR A WARM FRONT MOVING NWD/NEWD ACROSS CENTRAL MS.  THE THREAT FOR

TORNADOES WILL CONTINUE OVERNIGHT WITH STORMS IN THE PRIMARY

BAND...AND WITH ADDITIONAL MORE ISOLATED DEVELOPMENT IN THE OPEN

WARM SECTOR WHERE CONVECTIVE INHIBITION IS WEAK.



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.





...THOMPSON

