From the SPC
Look for the tornado watch to be extended eastward, perhaps into West Central Alabama as early as 1 a.m.
ACUS11 KWNS 260438
SWOMCD
SPC MCD 260438
ALZ000-MSZ000-LAZ000-260615-
MESOSCALE DISCUSSION 0267
NWS STORM PREDICTION CENTER NORMAN OK
1138 PM CDT WED MAR 25 2009
AREAS AFFECTED…SE LA…SRN MS…WCNTRL AL
CONCERNING…TORNADO WATCH 66…
VALID 260438Z – 260615Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 66 CONTINUES.
WIND DAMAGE WILL LIKELY ACCOMPANY A SQUALL-LINE MOVING SEWD ACROSS
ERN LA AND SRN MS OVER THE NEXT 2 TO 4 HOURS. HAIL AND A FEW
TORNADOES WILL BE POSSIBLE WITH ROTATING CELLS IN OR AHEAD OF THE
LINE. THE LINE SHOULD REACH WRN AL AFTER 08Z.
LATEST SFC ANALYSIS SHOWS A SLOW MOVING FRONTAL BOUNDARY ACROSS
CNTRL MS WITH A SQUALL-LINE/COLD FRONT EXTENDING SWWD ACROSS SW MS
INTO SE LA. SEVERAL BOWING-SEGMENTS ARE LOCATED ALONG THE
SQUALL-LINE MOVING AT ABOUT 40 KT. THIS COMBINED WITH INCREASING
LOW-LEVEL FLOW WILL SUSTAIN A WIND DAMAGE THREAT LATE TONIGHT. IN
ADDITION…REGIONAL WSR-88D VWPS SHOW FAVORABLE LOW-LEVEL SHEAR /0-1
KM SHEAR OF 30 TO 35 KT/ FOR A FEW TORNADOES. AN ISOLATED TORNADO
THREAT WILL LIKELY EXIST WITH MORE INTENSE BOWING LINE SEGMENTS AND
WITH ISOLATED SUPERCELLS THAT CAN DEVELOP AHEAD OF THE LINE. AN
ENHANCED TORNADO THREAT COULD EXIST WHERE THE LINE INTERSECTS THE
FRONTAL BOUNDARY IN CNTRL MS AS IS OCCURRING IN CLAIBORNE COUNTY MS.
..BROYLES.. 03/26/2009
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