A powerful storm system is expected to develop this week and blast portions of the Northeast with heavy rain while accumulating snow is possible in the Ohio Valley and Appalachians.

A warm and mild start to the week will quickly change on Wednesday as the next weather-maker moves through the D.C. area with colder air, gusty winds and chance

The heaviest precipitation is expected in Central New York and the Finger Lakes, which could see some lake effect snow or rain after the main storm moves through. Temperatures will likely be too warm for areas like Syracuse to see snow, but there’s a 50% chance that higher elevations like the Catskills will.