Cold northern air out of British Columbia is expected to begin flowing into the Inland Northwest through mountain passes and valleys along the Canadian border today.
As the cold air seeps southward, the region should see the lingering effects of a low-pressure system that moved through the region on Monday.
Snow flurries are possible across much of the Inland Northwest, especially in southeast Washington and the central Idaho Panhandle.
Highs today in Spokane should reach the middle 30s with northeast winds of about 11 mph.
The northerly flow will cause temperatures to plunge to the upper teens to near 20 tonight and again on Wednesday night.
While patchy fog is possible at night and in the morning this week, there is also a likelihood that some sunshine will get through the clouds after the fog dissipates during daytime hours.
Drier weather is expected through most of the week as a high-pressure area moves on shore from the eastern Pacific.
Then this weekend, the storm track begins to take aim at the Inland Northwest, bringing a mix of rain or snow to the valleys and snow to the mountains on Friday night through Sunday.
Snow levels should drop to between 2,100 and 2,300 feet. Downtown Spokane is at 1,850 feet and Spokane International Airport is at 2,370 feet.
Highs over the weekend should reach the 40s.
At 7 a.m. today, it was 30 degrees at the airport and in Deer Park and 31 at Felts Field and Pullman.