ZCZC SPCSWOMCD ALL
ACUS11 KWNS 302054 
SPC MCD 302054 
GAZ000-ALZ000-302300-

Mesoscale Discussion 2087
NWS Storm Prediction Center Norman OK
0254 PM CST Thu Dec 30 2021

Areas affected...portions of south-central Alabama...and central
Georgia

Concerning...Severe Thunderstorm Watch 572...

Valid 302054Z - 302300Z

The severe weather threat for Severe Thunderstorm Watch 572
continues.

SUMMARY...Thunderstorms will continue to intensify across WW 572
this afternoon. Damaging wind gusts, large hail, and a couple of
tornadoes are possible.

DISCUSSION...A band of semi-discrete supercell clusters will
continue spreading generally eastward across parts of east-central
AL and central GA over the next several hours. Within the
pre-convective environment, moist south-southwesterly trajectories
(upper 60s/lower 70s dewpoints) off the eastern Gulf of Mexico
combined with diurnally steepening low-level lapse rates are
resulting in favorable surface-based inflow. Generally weak forcing
for ascent across the area combined with deep-layer shear vectors
oriented obliquely to the low-level axis of forcing should support
the maintenance of separated updrafts. Ahead of the ongoing
convection, the latest RAP mesoanalysis and VWPs show effective SRH
values of 150-180 m2/s2 and 0-6 km bulk shear of 50-60 knots. These
factors will continue to support the risk of semi-discrete supercell
structures capable of producing large hail, damaging wind gusts, and
a couple of tornadoes. The tornado risk may eventually become
maximized over portions of south-central GA, where surface winds
should remain slightly more backed beneath a strengthening 850-mb
low-level jet.

..Weinman.. 12/30/2021

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...CHS...CAE...JAX...FFC...TAE...BMX...MOB...

LAT...LON   31528622 31868678 32358662 32628594 33008461 33168335
            33208245 32868207 32348206 32008225 31818278 31528622 

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