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A Little Bit Of Light Snow Mon Afternoon; A Significant To Major Winter Storm Likely Wed Night & Thu

Updated: Dec 13, 2020

A Little Bit Of Light Snow Is Expected For Monday Afternoon: A fast moving area of low pressure system is expected to pass well to the southeast of Nantucket during Monday afternoon and evening. Light snow, which may mix with rain and sleet at times will overspread Western and Central Mass during the late morning and early afternoon hours of Monday. Light snow or a mix of light snow, sleet and rain is then expected to continue throughout Monday afternoon before coming to an end during Monday evening. Little to no impact is expected from Monday afternoon’s snowfall as total snow amounts of 1 inch or less seems likely across a majority of Western and Central Mass. The exception may be across areas south of the Mass Pike where up to 2 inches of snow is possible. A Significant To Major Winter Storm Is Looking Increasingly More Likely For Wednesday Night & Thursday: Once Monday’s storm system moves to our east, an area of high pressure will briefly build into the area on Tuesday leading to a sunny day throughout Tuesday. This high pressure system will pull some Arctic air southward into New England leading to a cold day on Tuesday with high temperatures between 30 and 35 Degrees. This change in the air mass means that it will be more than cold enough to snow for Wednesday night and Thursday morning. At this point, it appears that an area of low pressure will form near the Virginia coastline on Wednesday evening and head to near Nantucket by about midday Thursday before heading east-northeastward to the south of Atlantic Canada. This is a track that is favorable for heavy snow accumulations across a majority of Western and Central Mass for Wednesday night and Thursday. With that said, the exact track of this storm still needs to be ironed out and any small deviations in the storm track could lead to some changes in the snowfall forecast. Here Are My Thoughts As Of Right Now: Snow is expected to overspread Western and Central Mass by about early Wednesday evening. The snow is then expected to continue throughout Wednesday night and much of Thursday. A period where the snow will come down very heavily is possible from very late Wednesday night through Thursday morning. Snowfall rates upwards of 2 inches per hour are possible during this time frame. Some light snow is expected to persist through Thursday afternoon before ending Thursday evening. In addition to the snow, north to northeast winds are expected to gust up to 25 to 35 mph at times during Wednesday night and Thursday leading to the snow to blow and drift. Also, this is going to be a “cold” storm with temperatures remaining in the 20 to 25 Degree range throughout the storm. This also means that this will be a light and fluffy snow. My latest forecast snow total map for this storm can be found attached to this post.

I continue to watch this storm extremely closely and will have additional updates as needed.

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