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.
Regardless of the accumulation amounts in various places, this storm can cause disruption over a large area from Missouri to Maryland.
The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com