At 12:08 p.m. on Sunday, the NWS Spokane WA issued a wind advisory valid from Monday 7 p.m. until Tuesday 7 a.m. for Northeast Mountains.

Hazardous and potentially life-threatening winter conditions are likely through the end of the week and into next, according to the NWS.

You can see in the RRFS model's radar simulation below that there will be three hits of snow coming. The first brings a dusting of powder to the southern half of the state Sunday night, followed by a shot at 1-3 inches in far northern Minnesota Monday night. Then comes the angry clipper on Tuesday.

Forecasters don't expect much of the weekend's snow to stick. Andrew White, an NWS meteorologist, said Indianapolis might see half an inch of accumulation on Sunday morning.

Up to 8 inches of snow could hit on Saturday, prompting meteorologists to issue new winter storm warnings in one state.

Indiana is about to experience a dramatic shift in temperatures, with a brief warm-up mid-week followed by the coldest air of the season sweeping in for next weekend.

The cold air and strong winds are expected to drop temperatures below zero in a large portion of Northern Indiana and parts of Central Indiana, according to the NWS. "The main thing people should worry about is going to be the wind chills.

St. Louis forecast: cloudy with temps near 40°F, light winds, cooling to 23°F at night; clear, sunny, and cooler into next week.