Snow is falling in the Peoria area, and the city's plows are expecting a busy day ahead.

Following a revised forecast Friday afternoon, the Tri-County Area is under a winter storm warning, according to the National Weather Service in Lincoln. It's effective until midnight Saturday.

The update brought Fulton, Peoria, Tazewell and Woodford counties in line with Mason and Schuyler counties, for which a warning already had been issued until 6 a.m. Sunday.

Hancock, Knox, McDonough and Warren counties, including the Macomb and Galesburg areas, received the storm-warning designation early Saturday, to remain in effect most of the day.

As of about noon Saturday, 6½ inches of snow were reported in Peoria, according to the Weather Service.

Other totals included 9.1 inches in Lewistown, 9 inches in Macomb, 8 inches in Manito, 7 inches in Carthage, 6½ inches in Rushville, 6 inches in Pekin, 5.7 inches in Morton, 5 inches in Canton, 5 inches in Metamora, 4½ inches in Chillicothe, 4.3 inches in Tiskilwa and 4 inches in Avon.

The Fulton County Emergency Services and Disaster Agency reported snow totals by midnight are expected to range from 6 or 7 inches in Farmington to 8 or 9 inches in Astoria. Farmington is in far-northern Fulton County, Astoria at the opposite end.

City of Peoria plows are working around the clock on two, 12-hour shifts, said Sie Maroon, the city's assistant public works director. The department plans to maintain routed primary streets until the snow stops.

"We encourage everyone to stay home if possible, but we are committed to doing everything we can to make travel safe for those that need to travel on our roads," Maroon stated in a news release. "Please watch for snow plows while traveling to your respective locations as we want to help you get to where you need to be."

As of Saturday morning, most places in the Tri-County area were under collision alerts. Those involved in minor traffic accidents are to exchange information and report them to the police department within 48 hours after the alerts end.

The Peoria and Pekin locations of those cities' respective public libraries were closed Saturday because of snow.

The rest of the Journal Star area — including Kewanee, Lacon, Princeton and Toulon — is under a winter weather advisory that is to extend through most of Saturday.

Snow totals are expected to taper north and northwest of Peoria, to as little as 3 to 5 inches in Bureau and Putnam counties, according to the Weather Service.

Total snowfall of 6 to 12 inches is expected along and south of a Rushville-to-Lincoln-to-Danville line. This is expected to make problematic travel to Springfield, Decatur and Champaign, among other places.

A flood warning also is in effect for areas along the Illinois River in Cass, Fulton, Mason and Schuyler counties.

The heaviest snow is falling in the St. Louis area. Almost 8 inches fell Friday, and as many as 8 more inches were expected Saturday.