Monday, March 03, 2008

Storms continue to approach

There are still lots of tornado warnings to the west in Mississippi as of 9:30. A tornado watch will likely be issued soon for parts of Alabama, south of Tuscaloosa and Birmingham.


   MESOSCALE DISCUSSION 0336
NWS STORM PREDICTION CENTER NORMAN OK
0859 PM CST MON MAR 03 2008

AREAS AFFECTED...ERN MS...SWRN AL...WRN FL PANHANDLE

CONCERNING...TORNADO WATCH 92...

VALID 040259Z - 040400Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 92 CONTINUES.

...SEVERE THREAT WILL INCREASE ACROSS ERN MS INTO WRN/SRN AL INTO
THE FL PANHANDLE BY MIDNIGHT. TORNADO WATCH MAY BE REQUIRED BY
04Z...

MODIFIED GULF AIRMASS HAS RETURNED ACROSS SERN LA INTO SERN MS AND
EXTREME SRN AL...PER SFC DEW POINTS INTO THE MID 60S. THIS MOISTURE
RETURN WILL BE INSTRUMENTAL IN BOOSTING INSTABILITY FOR ROBUST
UPDRAFT DEVELOPMENT. ADDITIONALLY...STRONGER FORCING WILL SOON
SPREAD ATOP THIS HIGHER THETA-E AIRMASS WHICH WILL ENHANCE
ORGANIZATIONAL POTENTIAL. OVER THE LAST HOUR OR SO...CONVECTION
SOUTH OF I-20 IN MS HAS GRADUALLY INCREASED ALONG ADVANCING FRONTAL
ZONE. THIS TREND SHOULD CONTINUE AND A MORE FOCUSED SQUALL LINE
WILL LIKELY EVOLVE OVER THE NEXT FEW HOURS. NEEDLESS TO
SAY...STRONG LOW-MID LEVEL SHEAR WILL SUPPORT SUPERCELL
DEVELOPMENT...HOWEVER THE DOMINANT STORM MODE MAY BE LINEAR IN
NATURE...ALTHOUGH BOW-TYPE STRUCTURES MAY EVOLVE WITHIN THE LINE.
ISOLATED TORNADOES ARE ALSO POSSIBLE GIVEN THE INCREASE IN MOISTURE
AND STRONG SHEAR.

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