Winter storm warnings were issued Saturday for up to 13 inches of snow in northern Michigan and for an additional 5-7 inches in Metro Detroit through Sunday.

At about 3 p.m. Saturday, the National Weather Service warned six counties along Michigan’s southeastern shoreline — Monroe, Wayne, Macomb, St. Clair, Sanilac and Huron — that heavy snow after midnight, and winds of 35 mph or more, would create blowing and drifting and make travel difficult. Less snow was predicted for other Metro Detroit counties.

“Delay all travel if possible,” the weather service said. “If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility.”

Metro Detroit also should expect periods of freezing drizzle are possible into Saturday night as well, particularly south of M-59.

Earlier Saturday, the National Weather Service warned Presque Isle, Alpena, Alcona, Iosco and Arenac counties along the Lake Huron shore in northern lower Michigan of 8-13 inches of snow. Marquette County in the Upper Penninsula is projected to get 7-12 inches in the same period.

Local agencies promised to have snowplow drivers out in force during the Presidents Day holiday weekend.

“It might be a three-day weekend for some — but not for our snowplow drivers and mechanics!,” the Road Commission for Oakland County posted on Facebook. “While others relax, our crews will be out keeping roads safe.”

This latest round of snowfall comes after a wide-ranging system swept across the state Wednesday night and Thursday morning, bringing more than 10 inches of snow in parts of the state, like Sanilac County in the Thumb region, where 10.5 was recorded in Lexington. It also brought notable totals to Metro Detroit, like the 5.4 inches recorded in Lake Orion, in Oakland County.

Inclement weather is expected to continue to plague Michigan next week as well. The NWS said more lake effect snow is likely early next week for the western part of the state with “well below zero wind chills likely on Monday and Tuesday.”