ACUS11 KWNS 212154
SWOMCD
SPC MCD 212154=20
GAZ000-FLZ000-ALZ000-220400-

Mesoscale Discussion 0051
NWS Storm Prediction Center Norman OK
0354 PM CST Tue Jan 21 2025

Areas affected...portions of southern GA and northern FL

Concerning...Heavy snow=20

Valid 212154Z - 220400Z

SUMMARY...Wintry precipitation to the west and north should
gradually expand in coverage and intensity over portions of southern
GA and northern FL late this afternoon and evening. An initial
wintry mix of snow, sleet and freezing rain will be possible before
heavy snow, with rates near 1 in/hr, develops this evening.

DISCUSSION...As of 2140 UTC, regional radar analysis showed a broad
area of winter precipitation ongoing over much of the northern Gulf
Coast and Southeast. A band of moderate snow was also expanding over
portions of south-central GA. So far, temperatures have remained
above freezing over portions of southern GA and northern FL. Strong
cold advection from upstream stations in the mid to low 20s F should
support a continued cooling trend through the remainder of the
afternoon and into this evening. Columnar cooling will be further
aided by rapid moistening as deep-layer ascent increases with the
approach of the main precipitation shield. This should result in
temperatures falling to near or below freezing in the next couple of
hours, concurrent with the onset of precipitation from heavier
banding to the north and west.

As precipitation rates intensify, an initial wintry mix of sleet and
freezing rain will develop from southwest to northeast. This should
be followed by a relatively fast transition to all snow from the far
eastern FL Panhandle and across southern GA between 23-02z. Strong frontogenetic response in the 850-700 mb layer and rapidly cooling
temperatures may support snowfall rates near 1"/hr for a few hours
as snow gradually expands northeastward through the evening hours.

..Lyons.. 01/21/2025

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!81yXxgXiU97F-jGCU0ABHQToy1u_IHJ4D7Kh205yC59BnlS4Ta0as46b8R_eSTSubDRpUj5Kh= FZ8A0wweq1NHM4Hskg$ for graphic product...

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

LAT...LON 30088437 30198306 31128159 31988108 32488132 32928181
33008217 32508404 31498515 30518497 30088437=20


=3D =3D =3D
To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

--- SBBSecho 3.20-Linux
* Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)