More than 6 inches of snow is possible across Massachusetts this weekend, according to the National Weather Service’s Boston office.

Snow is expected to stop in Worcester and the western part of the state before 9 a.m., gradually moving out of eastern Massachusetts by noon. Essex, Suffolk and Middlesex counties in the northeast part of the state may see snow showers through 5 p.m. on Sunday.

Snow will likely arrive between 8 and 10 a.m., persisting into the afternoon before ice mixes in. A flip to mixed precipitation will follow in some areas, including pockets of rain and freezing drizzle, ending between 5 p.m. and 7 p.m. Much of the state could see up to 4 inches of snow.

The majority of the snow accumulation in Massachusetts will occur between late Saturday night and early Sunday.

The National Weather Service issued a winter storm watch for all of Massachusetts on Thursday afternoon ahead of a system that could bring at least a half foot of snow to the region this weekend.

A winter storm watch has been issued for all of Connecticut ahead of a weekend storm that could bring up to 8 inches of snow, weather service says.

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.

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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.