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.

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.