Much of Massachusetts could see as much as a foot of snow fall during Saturday night's snowstorm. Here's when the storm might start and what it means for travel.

The National Weather Service has issued a winter storm watch for this weekend in Massachusetts. See how much snow is expected

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.