From the National Weather Service:
Another very cold day with thickening clouds and highs mainly in the 20s. Snow arrives across western MA/northern CT after 3 or 4 pm and into eastern MA/RI after 5 or 6 pm. Snow accumulates immediately on cold roads. Brunt of snow occurs this evening with difficult travel.
Winter Storm Briefing - Snow overspreads the region from west to east between 3 and 6 PM. Snow sticks immediately to cold roads and travel will be difficult this evening with several inches expected. Bulk of the snow is over by midnight, ending as light rain near the coast.
See briefing graphics below