A dense fog advisory is in effect until 4 p.m., according to the National Weather Service. An air stagnation advisory lasts through Sunday afternoon.
The high and low temperatures today will be in the 30s, which is above normal for this time of year, according to the weather service. Lower 20s are average for this time in January.
The fog will start to break up tonight, and be patchy on Thursday, but is expected to continue hanging over the Inland Northwest for the rest of the week.