ACUS11 KWNS 192135
SWOMCD
SPC MCD 192134=20
NHZ000-MAZ000-CTZ000-VTZ000-NYZ000-NJZ000-PAZ000-200100-

Mesoscale Discussion 0039
NWS Storm Prediction Center Norman OK
0334 PM CST Sun Jan 19 2025

Areas affected...Portions of the Mid-Atlantic and Northeast

Concerning...Heavy snow=20

Valid 192134Z - 200100Z

SUMMARY...Heavy snowfall will continue to shift northeastward this
evening across portions of the Mid-Atlantic and Northeast with rates
of >=3D1" per hour possible.

DISCUSSION...The latest water vapor imagery indicates that the
mid/upper-level speed max is exiting the coast. As a result, the
surface low is deepening off of Delmarva and is forecast to continue strengthening offshore and move quickly to the northeast. Low-level frontogenesis will continue to support upward vertical motion and
precipitation banding. Precipitation type is more uncertain near
the coast where strong low-level warm air advection will act to
offset cooling by evaporation and melting over the next few hours.=20
Thus, the corridor with the highest confidence of 1"+ snowfall rates
over the next few hours has been highlighted.

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

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7SFQiSpaq0fS9le-Yrtztr4cwsqnLr4qG6Upb8-BGPGrq0Bmqeazkyok0JngpN69FLCk-PgKU= hhnRg9fIVR2LlVw19Y$ for graphic product...

ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM...

LAT...LON 41857286 41487335 41127372 40807419 40527458 40357527
40617574 41167540 41777467 42177422 42537378 42897315
43077272 43187218 42867184 42477217 42307238 41857286=20


=3D =3D =3D
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