Winter storm, the biggest snow event of the season, hits Spokane on Wednesday night

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Winter storm watches are in effect for Spokane with a snow forecast of 4 to 7 inches. Snow is even more likely in northern Washington and Idaho.

SPOKANE, Wash. – A major winter storm is expected to hit the interior of the northwest Wednesday night and last all day Thursday. Spokane, northern Idaho, and most parts of eastern and northern Washington could see the largest single-event snow dump this season.

Winter storm watches will go into effect Wednesday evening at 6 p.m. for central Washington and 10 p.m. for Spokane and all areas east. The day before will remain in effect until Thursday afternoon.

Total snowfall will generally be between four and eight inches across the region, including Spokane. Northern Washington state and far north Idaho could push six to ten inches of snowfall, with the Silver Valley potentially gaining over 12 to 14 inches at the top of forecast snow totals.

A deep layer of moisture will fuel the development of snowfall in the atmosphere. From a meteorological standpoint, the humidity is moving northeast to eastern Washington and overlapping a warm front. This keeps areas below freezing but pumps out the humid atmosphere, which will lead to widespread heavy snowfall.

Only areas south of Interstate 90 could see the snow change to a mixture of rain and snow by Thursday afternoon as the warm front advances in the area. Tri-Cities should only gain an inch or two of snow before it switches to precipitation. In northern Washington and in the high elevations of the mountains, however, it is a blizzard.

One to two feet of snow is likely across the mountains in our region with two to three feet for the Cascades. It comes after Snoqualmie Pass reported that they have seen the most snowfall yet this season, with 236 inches (19 feet 8 inches) of snowfall.

All trips will be impacted by this snowstorm, from mountain passes to city streets. Be sure to check travel conditions before you go if you must drive and always have an emergency kit in your car. An emergency kit should contain blankets, snacks, water, first aid, medicine, a phone charger, and a flashlight.

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