signficant winter storm expected tonight

2:35PM 2/16/24 - Here’s our final call for tonight’s snow storm.

There have been 2 big changes to the forecast. The first is that a WINTER STORM WARNING is now in effect for all areas along and NW of I-95. A WINTER WEATHER ADVISORY is in effect for the remainder of the area. These alerts are in effect from approximately 11pm tonight until 5am tomorrow morning (may be extended a bit).

The second was with the forecast itself. We expect a widespread 3-5” of snow area wide (slightly lower south of rt.50). Across northern MD/southern PA, a band of 5-8” of accumulation is expected, but it’s uncertain exactly where this will set up. Right now, the highest likelihood is along the Mason Dixon line.
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This storm will likely feature a few bands of locally heavier snow, which can increase snow totals in some areas, while sinking air on either side of the band decreases totals in other areas. It’s impossible to know exactly where this will occur at this range but we will monitor this. Within these bands, lightning strikes are possible leading to thundersnow.

For impacts, they will be most significant overnight. By 7-8am, snow will be ending or already ended and with high sun angles, melting will be rapid on concrete surfaces. We expect all roads to be clear by tomorow afternoon at the latest. If traveling tonight, use extreme caution as visibility may drop below 1/2 mile with snowfall rates of 1-2” per hour. ​