From the National Weather Service:
January 4th, 7 pm breakdown ...
[SNOW] Moderate to heavy snow bands will linger for the next hour or two, as late as 8-9 pm, and then taper off; snowfall rates of 1-2"/hr remain possible along w/ white-out conditions; Winter Storm Warnings till as 1 am Friday to account for anticipated blowing & drifting of snow, reduced visibility, accumulation spreading on roads
[WIND] High Wind Warning & encompassing Winter Weather Headlines till 1 am Friday, gusts 40 to 60 mph, strongest along the E coast; otherwise wind gusts of around 30-50 mph linger across all of S New England thru as late as Saturday
[EXCESSIVE COLD] Excessively cold, Arctic air pushing across the region; temperatures dropping with some of the coldest air of the season forecast beginning tonight thru Sunday; Wind Chill Watch in effect for Friday evening through Saturday afternoon
Greatest concern of a flash freeze over the Cape and Islands, as well as Southeast Coastal Plymouth County, which were above freezing today; anticipating slushy precipitation to freeze tonight, untreated roads to become icy
[MARINE] Hurricane Force Wind Warnings continue till 7 pm w/ the potential for gusts of 50-70 mph, however a tapering trend is forecast, isolated gusts possible; waves 20 to 25 feet; beach erosion w/ wave action remains possible