Tuesday, December 08, 2009

Tornado Watch - West and Central Alabama


 
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 798
NWS STORM PREDICTION CENTER NORMAN OK
615 PM CST TUE DEC 8 2009

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

WESTERN AND CENTRAL ALABAMA
EASTERN MISSISSIPPI

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 615 PM
UNTIL 200 AM CST.

TORNADOES...HAIL TO 1.5 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 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH NORTHWEST OF
BIRMINGHAM ALABAMA TO 40 MILES SOUTH SOUTHEAST OF PINE BELT
MISSISSIPPI. 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 796...WW 797...

DISCUSSION...TSTMS EXPECTED TO PERSIST AND POSSIBLY STRENGTHEN IN
ERN-MOST SW/NE BAND OF TSTMS IN MS AS THE BAND EDGES SLOWLY EWD
THROUGH EARLY WED. INCREASING SHEAR/ASCENT ASSOCIATED WITH
POWERFUL...EWD-MOVING OK/AR UPR VORT...AND GRADUALLY INCREASING LOW
LVL MOISTURE INFLOW...SUGGEST POTENTIAL FOR A FEW LONGER-LIVED
DISCRETE OR SEMI-DISCRETE SUPERCELLS. THESE MAY PRODUCE A STRONG
TORNADO OR TWO...IN ADDITION TO HIGH WIND/MARGINALLY SVR HAIL.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24050.


...CORFIDI

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