Warm air will pour into the area Monday night ahead of the frontal boundary and we'll see mixed wintry precip spreading into the Appalachians. The storm has the potential to create hazardous conditions like icy roadways, power lines and tree limbs and will need to be watched closely as it develops.
All that warm air ahead of the front will put temperatures in the mid 40s and will change mixed precip to all rain by midmorning Tuesday. Expect lots of moisture aloft as the front crosses the Ohio Valley into West Virginia Tuesday night/Wednesday. Up to an inch of rainfall is expected before cold air collapses into the region changing the rain/mixed precip to all snow during the day Wednesday. We'll also see strong wind gusts as the low pressure center passes Wednesday.
I'm thinking we'll miss out on the heaviest snowfall this week. Looks like we'll pick up a quick 2-4 inches of snow before the system exits Thursday. But the storm will put some big numbers in the snowfall forecast from Central Illinois all the way to Maine before the week's end. Lots of cold air will keep temps on the cool side to finish out the work week. Things will dry out nicely for us by Friday.