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Cold temps set in early this week,
but transient ups & downs continue
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Rain to light snow expected on Tuesday afternoon/evening

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Quick-hitting wave brings light snow to parts of the region

Summary: 

A relatively weak wave of low pressure will move from its current position in Western Virginia to a position just off the DelMarVa coast Tuesday evening. Snow in advance of this system will break out in SW areas of West Virginia and spreads northeastward. As the system encounters milder temps above freezing farther NE, precip type will be rain initially until the column sufficiently cools to allow for a transition from rain to snow. As the low redevelops offshore this evening, subsidence will prevent the precip from expanding to the northeast, hence lesser snow totals expected in those areas.

Impacts and Timing:

Impacts are expected to be minor, with generally non-paved surface accumulations of snow in areas C and D on the map below. Areas A and B are expected to see at least some accumulations of snow on  untreated roadways, especially in areas of elevation.

Timing is generalized, but we expect precipitation to break out late morning to early this afternoon in area A, then brief rain to snow early to mid-afternoon in area B. In area C the onset rain will arrive late afternoon, and transitions to snow this evening, and area D will see a similar transition time, but will have lighter rates and some accumulations lost to onset rain and melting initially. All precipitation ends this evening, from mid-late evening from west to east, and clears the coast around or just before midnight tonight.

Additional Lake Effect snow showers and snow squalls will be possible on Wednesday which can drop a quick coating to 1″ of snow, mainly in interior areas, during the day. This snow is NOT reflected in the snow map below, and is considered separate. In addition, winds will gust 25-35mph on Wednesday from dawn through evening, with isolated higher gusts to 45mph, especially in areas of elevation and when accompanying more robust snow squalls across the region.

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SNOW IMPACT MAP FOR THE REGION

Below is the snow accumulation expectations from Tuesday’s system

DBR-286-05-WinterNewDelivery_940x125
snowmap4

Forecaster:   Martrich, Rinaldi, Carmella
Weather Alerts last updated: 11:00am Tuesday January 7th, 2020

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