The first nor'easter of the season is expected to impact our weather over the weekend. Low pressure slides up the Atlantic seaboard and hugs the coast, bringing heavy rain and wind to the region. The higher elevations are expected to pick up a slushy snow accumulation too.
The event begins locally Saturday morning, between 7-9am. The precipitation starts out as a wintry mix along the higher elevations. Watch out for the possbility of sleet and freezing rain. It's unusual to get this type of precipitation this early in the season, and there's a lower risk of ice buildup on roadways. This is because the ground is still relatively warm.
Why a wintery mix? It has to do with the temperature profile of the atmosphere on Saturday. A warm wedge of air a few hundred feet above the surface is expected to melt snow. Hilltops above the warm wedge have a higher likelihood of seeing snow because they will be above the warm air. Snow accumulation on the hilltops is generally expected to range between 1-3".
In the lower elevations, rain is expected to be the dominant type of precipitation. It will be windy and cold, with highs only in the upper 30s to near 40. The weather will improve Sunday, with lighter winds and a few scattered showers.