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.

Photographer David Northall […] An atmospheric river brought heavy rain, serious mountain snow and strong winds to California that flooded roads and rivers and triggered landslides – and more rain is on the way.

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. The system is expected to turn into freezing rain this afternoon before tapering off in the evening hours,