SWOMCD
SPC MCD 221532
ALZ000-FLZ000-MSZ000-LAZ000-221630-
MESOSCALE DISCUSSION 2389
NWS STORM PREDICTION CENTER NORMAN OK
0932 AM CST THU DEC 22 2011
AREAS AFFECTED...SERN LA/SERN MS/AL/WRN FL PANHANDLE
CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY
VALID 221532Z - 221630Z
TORNADO WATCH WILL BE COORDINATED SHORTLY TO INCLUDE MUCH OF THE
IMMEDIATE WARM SECTOR FROM NRN AL TO THE CNTRL GULF COAST.
MOISTURE IS RETURNING NWD ACROSS THE WARM SECTOR AS VEERED LLJ
CONTINUES TO INCREASE AND TRANSLATE TOWARD NRN AL. BASED ON 12Z
SOUNDING DATA IT APPEARS MID-UPPER 60S SFC DEW POINTS WILL BE NEEDED
TO YIELD MARGINAL SFC-BASED INSTABILITY. EVEN SO STRONG
ENVIRONMENTAL SHEAR WILL PROVE FAVORABLE FOR ROTATING UPDRAFTS AND
PERHAPS SUFFICIENT FOR ISOLATED TORNADIC SUPERCELLS. OTHERWISE IT
APPEARS FRONTAL CONVECTION WILL GRADUALLY INCREASE IN INTENSITY
WHICH WOULD POSE AT LEAST A DAMAGING WIND THREAT.
..DARROW.. 12/22/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...BMX...HUN...MOB...JAN...LIX...
LAT...LON 29238988 34168737 34078546 30138670 29238988
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