@chelseaweather #mdwx: As one system departs, another more potent gears up to dig in! This next system will swiftly move eastward across the country ushering in some of the coldest air of the season so far! The short wave that has been bringing showers from the northern tier of Pa. northward through New England will slowly be moving out of the area Sunday evening and overnight. The associated cold front that has been slowly pushing eastward across the mid-Atlantic is currently making an exit. This system has really revved up our winds for the day bringing gusts anywhere from 20-40 mph statewide. Winds will begin to subside overnight.
In between the two systems Monday, a weak area of high pressure will build into the Northeast and mid-Atlantic regions and should lead to an overall nice start to the day. As the day progresses Monday, the next area of low pressure will be tracking across Quebec and the associated cold front will move through the Great Lakes. Out ahead of this approaching front, clouds should increase. Model soundings start to show a moistening profile by 1 p.m. Monday and that moisture only increases into the early hours on Tuesday. The thinking is that when the precipitation moves in Monday night, it will start as rain, but then some snowflakes will likely mix in by early Tuesday morning. I think the best chance for this will be in the suburbs and we are not expecting any accumulation out of this system as it moves through. By the early hours Tuesday, the precipitation should be starting to taper off and will be out of the area by noon Tuesday.