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Snow Saturday night in the Middle Atlantic States

January 11, 2019; 9:04 AM

This morning, we see a high pressure area north of the Great Lakes and a low pressure area east of Maine, and there is another low pressure area off the lower-left corner of the map. This setup with a high pressure area to the north to maintain cold air and the low pressure area to the southwest is what we would expect to see if a major snowstorm is coming. There is upper air support for such a storm in Missouri and southern Illinois, but the computer models weaken the upper-air feature as it moves eastward. That's why the map below the surface map shows the snow area thinning out as it moves east.

2019-01-11_07-41-14pan.png

Regardless of the accumulation amounts in various places, this storm can cause disruption over a large area from Missouri to Maryland.

2019-01-11_08-13-46snowmap.png

The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com

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