MD 0052 CONCERNING HEAVY SNOW FOR FAR SOUTHEAST LOUISIANA...FAR SOUTHERN MISSISSIPPI...FAR SOUTHERN ALABAMA...FLORIDA PANHANDLE
Mesoscale Discussion 0052
NWS Storm Prediction Center Norman OK
0452 PM CST Tue Jan 21 2025
Areas affected...Far Southeast Louisiana...Far Southern
Mississippi...Far Southern Alabama...Florida Panhandle
Concerning...Heavy snow
Valid 212252Z - 220445Z
SUMMARY...Heavy snow will be likely over the next few hours along
parts of the central Gulf Coast from far southeast Louisiana into
the Florida Panhandle and southern Alabama. Snowfall rates are
expected to exceed 1 inch per hour within the heaviest parts of the
band.
DISCUSSION...Water vapor imagery shows a mid-level trough from the
Ohio Valley extending southwestward into the lower Mississippi
Valley. A powerful mid-level jet of 100 to 140 knots is located to
the east of the trough, with the exit region of this jet located in
the central Gulf Coast region. Widespread precipitation is ongoing
beneath this feature (where lift is strong) from far southeast
Louisiana east-northeastward into the Florida Panhandle and southern
Alabama. Most of the precipitation is in the form of snow, with some
reports of heavy snow. The latest model forecasts suggest that a
band of strong isentropic ascent will continue to spread eastward
across the central Gulf Coast region, making conditions favorable
for heavy snow over the next few hours. Snowfall rates are expected
to exceed 1 inch per hour in some locations. The potential for heavy
snow is expected to continue into early to mid evening over southern
Alabama and the Florida Panhandle. Further to the west, snowfall
rates should gradually decrease over parts of far southeast
Louisiana and southern Mississippi.
..Broyles/Smith.. 01/21/2025
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...TAE...BMX...MOB...LIX...
LAT...LON 31968552 31388505 30768485 30258490 29918518 29958587
30098666 30118728 29978839 29728905 29538948 29508972
29708985 29978979 30298952 30718851 31188774 32058650
31968552
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MD 0051 CONCERNING HEAVY SNOW FOR PORTIONS OF SOUTHERN GA AND NORTHERN FL
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
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 www.spc.noaa.gov for graphic product...
ATTN...WFO...CHS...CAE...JAX...FFC...TAE...
LAT...LON 30088437 30198306 31128159 31988108 32488132 32928181
33008217 32508404 31498515 30518497 30088437
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