ACUS11 KWNS 191800
SWOMCD
SPC MCD 191800=20
PAZ000-DEZ000-MDZ000-WVZ000-VAZ000-192230-

Mesoscale Discussion 0038
NWS Storm Prediction Center Norman OK
1200 PM CST Sun Jan 19 2025

Areas affected...Portions of Mid-Atlantic States

Concerning...Heavy snow=20

Valid 191800Z - 192230Z

SUMMARY...Snowfall will continue to increase from southwest to
northeast across portions of West Virginia, Maryland, and
Pennsylvania this afternoon with rates exceeding 1" per hour.

DISCUSSION...An upper-level trough and associated speed max rotating
around a low near Hudson Bay are moving toward the East Coast this
afternoon. In response at the surface, a low over North Carolina is
forecast to deepen and shift northeastward through the afternoon.=20
To the north to northwest of the surface low, low-level
frontogenesis will promote upward vertical motion and precipitation
banding. Given these favorable factors and cold vertical profiles,
snowfall rates of >=3D1" per hour are likely this afternoon with
higher rates possible in banded structures.

..Jirak/Mosier.. 01/19/2025

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-kDo0id5_mIg-YTrHiMZhpfNMcBFPuyPpnWMZjj3ueOYDo_5kTrweOtMMFomXd_wlsz5IAOSZ= bCWpi090k5Ri9uV3AI$ for graphic product...

ATTN...WFO...PHI...CTP...LWX...RNK...PBZ...RLX...

LAT...LON 39687582 39517657 39347767 39067877 38717917 38377961
38078019 38018068 38168091 38788077 39448031 40117977
40437925 40867841 40947721 40887643 40637544 40257509
39927529 39687582=20


=3D =3D =3D
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