A messy storm will move across the Great Lakes today into tonight followed by a trailing storm later Tuesday and Wednesday. Boundary layer temperatures will be the issue with the storm. As I said last week, the accumulating snow will be north of I-90 across the Northeast and across the northern Great Lakes where 1-6 inches will accumulating depending on location and elevation. South of this areas will be a mixture of snow, sleet, freezing rain and just rain with a light glaze and some travel issues.
I used the 3km NAM model total snowfall to illustrate the snowfall with the storm.
The storm is a good example of the cold air that has been lacking for a good part of December.
Current Surface Map