A winter storm was sweeping across a large portion of the US on Thursday, bringing snow, ice and rain to several states in the Midwest and Northeast.

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.

The Boston 25 Weather team is closely tracking a system that could bring up to 5 inches of snow and icy driving conditions on Thursday before an eventual flip to rain in some places.