Severe Weather Watch Notice

From ABC 33/40 E-Warn :

WWUS20 KWNS 111710
SEL7
SPC WW 111710
ALZ000-GAZ000-TNZ000-112300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 17
NWS STORM PREDICTION CENTER NORMAN OK
1210 PM EST WED FEB 11 2009

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

NORTHERN ALABAMA
NORTHWEST GEORGIA
SOUTHEAST TENNESSEE

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1210 PM UNTIL
600 PM EST.

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 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF
CHATTANOOGA TENNESSEE TO 55 MILES SOUTH SOUTHEAST OF BIRMINGHAM
ALABAMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

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 16...

DISCUSSION...LINE OF CONVECTION CONTINUES TO INTENSIFY OVER MIDDLE
TN...EXTENDING INTO EASTERN AL. THREAT FOR LOCALLY DAMAGING WINDS
IS EXPECTED TO DEVELOP THROUGH THE AFTERNOON AS 120+ KNOT MID LEVEL
JET MAX SURGES INTO REGION. LOW LEVEL VERTICAL SHEAR PROFILES ARE
ALSO QUITE FAVORABLE FOR BOW/LEWPS ALONG THE LINE...AND PERHAPS
ISOLATED CELLS AHEAD OF THE LINE...CAPABLE OF ISOLATED TORNADOES.

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 400.
MEAN STORM MOTION VECTOR 25040.

...HART
WWWW

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