A moderate snow event will arrive from the southwest today as low pressure moves up the Ohio Valley. Strong Canadian high pressure will keep cold air locked in at the surface, but warm air should be able to move in aloft especially south of Portland. That means snow may briefly change over to sleet early this afternoon, cutting down on total accumulations. Before that though, it will be pretty steadily snowing all morning with a general 3-6″ of accumulation likely across the area. Later in the afternoon, low pressure will redevelop offshore and any sleet will change back to snow with another 2-4″ of snow expected especially closer to the coast. So when all is said and done this looks to be a solid 4-8″ event for much of the area with a few pockets of 8-12″ totals most likely in the mountains and along the coast (especially the midcoast).
Snow will taper off from west to east in the late afternoon/early evening hours.