MINNEAPOLIS (AP) -- Much of Minnesota is gearing up for its first major winter storm of the season.

The National Weather Service says the snow will start falling in western Minnesota after midnight and make driving difficult for the Monday morning commute in the Twin Cities.

And it warns the drive home Monday evening will be severely impacted.

Winter storm warnings are out from South Dakota across central Minnesota into northern Wisconsin.

Six to 12 inches of snow are forecast across much of the area, with more than a foot possible in parts of northern Wisconsin.

Hardware, outdoor gear and tire stores are reporting brisk business.

Delta Air Lines is allowing travelers to reschedule flights scheduled for Monday through Minneapolis and Rochester, as well as Sioux Falls, South Dakota, and Green Bay, Wisconsin.