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 winter weather advisory is in effect in Massachusetts today as several inches of snow is expected to fall across the state, according to the National Weather Service's Boston office. Snow is already beginning in western Massachusetts as of 8 a.m. Thursday, and it will pick up in the eastern part of the state later this morning.

As the storm approaches, conditions will be cold enough initially for snow, but it will pull in some mild air that is expected to change the precipitation to rain for some.

The Boston 25 Weather team is closely tracking a system that could bring up to 5 inches of snow and icy driving conditions on Thursday before an eventual flip to rain in some places.