The snow will arrive Saturday between 10 p.m. and midnight. Once it arrives, it will hit the ground running. The majority of the snow accumulation will occur between midnight and 7 a.m. on Sunday. There will be some light snow and flurries between 7 a.m. and noon but very little additional accumulation.

A half-foot or more of snow is possible across much of Massachusetts from a storm that's expected to arrive late Saturday and last into Sunday. "It's a real thump of snow overnight into early morning,