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.

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.