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SPC MD 53

MD 0053 CONCERNING HEAVY SNOW FOR CENTRAL AND EASTERN PORTIONS OF THE CAROLINAS
        
MD 0053 Image

Mesoscale Discussion 0053
NWS Storm Prediction Center Norman OK
0801 PM CST Tue Jan 21 2025

Areas affected...central and eastern portions of the Carolinas

Concerning...Heavy snow 

Valid 220201Z - 220700Z

SUMMARY...Moderate to heavy snow should gradually become widespread
through early tonight across portions of the central and eastern
Carolinas.

DISCUSSION...700 mb warm-air and moisture advection are increasing
over central and eastern parts of the Carolinas with the approach of
a pronounced 500 mb trough that is traversing the central
Appalachians. Beneath the 700 mb moistening, strong surface-850 mb
cold-air advection is contributing to further saturation and
sensible cooling of the column to support a predominance of snow,
which is currently being indicated by surface observations on a
widespread basis. Ahead of the upper trough, 700 mb frontogenesis is
intensifying, which should support increased snowfall rates. As
such, in addition to the transition to snow, 0.5-1.0 inch/hour
snowfall rates may develop over the next couple of hours, as also
suggested by some of the latest high-resolution guidance runs.

..Squitieri.. 01/22/2025

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

ATTN...WFO...AKQ...MHX...RAH...ILM...CHS...CAE...GSP...

LAT...LON   31968072 32388112 33088159 33798169 34438124 35427983
            35787825 36017695 36227604 35877554 35337562 34927650
            34557721 34057805 33607881 32857959 32288042 31968072 



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SPC MD 52

MD 0052 CONCERNING HEAVY SNOW FOR FAR SOUTHEAST LOUISIANA...FAR SOUTHERN MISSISSIPPI...FAR SOUTHERN ALABAMA...FLORIDA PANHANDLE
MD 0052 Image


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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