A quick moving storm system is expected to dive southeastward along the Idaho-Montana state line tonight, bringing potentially heavy snow to Lookout Pass along Interstate 90.
Six to 10 inches of snow are possible at the pass. The storm could also bring heavy snow to Lolo Pass, the Camas Prairie and the valleys south of St. Maries.
A winter storm warning is in effect for the mountains and a winter weather advisory for the Camas Prairie.
To the west, light snow or rain are likely tonight, with accumulation in Spokane of less than a half inch and a little more than an inch in Coeur d’Alene. Spokane may see rain and snow with a snow level at about 2,600 feet in elevation.
National Weather Service forecasters are also warning that freezing fog is possible this morning across the Inland Northwest, and light to moderate fog has been visible on traffic cameras in the Spokane vicinity this morning.
The high later today should reach 44 degrees in Spokane and 45 in Coeur d’Alene with clouds.
Air quality in Spokane had dropped to the moderate level this morning with a reading of 65 on the air quality index. Readings from 50 to 100 are considered moderate pollution. Wood smoke is the main problem.
A quiet weather period is expected on Wednesday through the weekend with partly sunny to sunny skies.
A large and strong area of high pressure is moving into the Gulf of Alaska along the Pacific coast and will take over the weather pattern, bringing dry conditions for the coming week. Forecast models show the high persisting through early next week. That will end the threat of snow for now.
Highs will range from the lower 40s on Wednesday to the middle 30s for the rest of the week. Lows will start dropping from freezing tonight to the middle and lower 20s as skies clear out.
Normal temperatures for today in Spokane are 35 for a high and 26 for a low.
At 7 a.m., the temperature was 31 at Spokane International Airport and 30 in Coeur d’Alene. Ice fog was reported at the airport.