"The rain will begin mixing with snow Saturday evening, and then change to all snow overnight before the moisture pulls east of the mid state", says the National Weather Service office in Nashville.
On Friday, the National Weather Service's Upton office said the entire region is under a winter weather advisory, including eastern Suffolk County, which had originally been placed under a winter storm warning. "The 18z GFS run from this afternoon depicts a major snowstorm with 8-16" of accumulation, while the 0z para GFS from last night depicts an inch or so of snow mixed with rain.
Following Tuesday's storm, the weather and temperatures will seem to "rebound" toward the weekend, reaching the upper 30s on Thursday and mid-40s by Friday, Hammer said.
High temperatures are expected to hit 30 by Saturday afternoon, with a low of 18 degrees by nightfall. Brr!
The biggest question marks remain for southern parts of Middle Tennessee, where less snow may fall. It will be blustery, with a brisk northwesterly wind persisting for at least the first half of the day. Our southern locations like Ithaca, Cortland, and Norwich may see some light snow accumulation by midday Friday. "The forecast data suggests that we may experience snow developing northwest to southeast across Morris County after midnight this evening".
About 2-3 inches of snow is expected for the Lancaster area. Up to 2 inches of snow accumulation could fall, and the low will be around 32.
That trend is expected to continue Sunday, with the high temperature in Boston forecast at 24 degrees, which would break the record low maximum temperature record of 25 degrees, according to the weather serice.
Winds: 10 to 20 miles per hour. Mostly cloudy, with a low around 29.
AccuWeather calls for a sharp turn in conditions from a high of 52 and partly sunny skies today to highs of 33 on Friday, then 23 and 28 over the weekend.