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WWUS20 KWNS 120545
SEL0  
SPC WW 120545
ALZ000-MSZ000-121100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 30
NWS STORM PREDICTION CENTER NORMAN OK
1145 PM CST THU MAR 11 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       WESTERN ALABAMA
       CENTRAL AND NORTHEAST MISSISSIPPI

EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1145 PM
UNTIL 500 AM CST.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 65
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHEAST OF
JACKSON MISSISSIPPI TO 50 MILES NORTH NORTHEAST OF COLUMBUS
MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

DISCUSSION...THUNDERSTORMS ARE INCREASING ALONG A SURFACE FRONT OVER
CENTRAL MS.  THIS ACTIVITY WILL SPREAD NORTHEASTWARD THROUGH THE
EARLY MORNING HOURS TOWARD NORTHWEST AL.  INSTABILITY IS WEAK...BUT
STEEP LAPSE RATES AND SUFFICIENT DEEP LAYER VERTICAL SHEAR WILL
SUPPORT A FEW INTENSE UPDRAFTS CAPABLE OF LARGE HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 55
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM
MOTION VECTOR 24035.


...HART
WWWW