BOSTON - Now that Thursday's snow is over, there's an excellent chance of plowable snow falling this weekend in Boston and most of Massachusetts. It could be the biggest snow storm of the season so far.

On Thursday at 2:39 p.m. a winter storm watch was issued by the National Weather Service valid from Saturday 7 p.m. until Sunday 4 p.m. for Franklin, Hampshire and Hampden counties.

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,