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By Joe Edwards
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Several states had been issued winter weather advisories by the National Weather Service (NWS) as of early Sunday, with up to 16 inches of snow possible in some parts of the country.
Why It Matters
Across parts of Montana, Wyoming, Washington and Idaho, the agency warned of wintry conditions that could make driving potentially hazardous.
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What To Know
In Washington state, the NWS said Western Okanogan County could see between 4 and 8 inches of snow in locations from 4,000 to 5,000 feet—with accumulations around 8 to 16 inches possible above 5,000 feet.
“Washington Pass will see the greatest snow amounts along Highway 20 in western Okanogan County around 13 to 16 inches,” it said, cautioning travelers to expect winter driving conditions.
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In Wyoming, the NWS said the Absaroka Mountains and Teton and Gros Ventre Mountains could see 6 to 10 inches of snow, mainly above 8,000 feet. The most impactful conditions are expected Sunday night, it added.
Parts of Idaho and Montana, including the southern Clearwater Mountains, west Glacier Region, Bitterroot/Sapphire Mountains, and the Potomac/Seeley Lake region could see up to 5 inches above 5,000 feet, with the potential for 7 to 12 in remote locations at the highest elevations, according to the NWS. “Use caution while driving,” the agency said. “Dirt roads on public lands could become difficult or dangerous for travel after heavy rains followed by snow.”
The NWS says it issues winter weather advisories “for any amount of freezing rain, or when 2 to 4 inches of snow (alone or in combination with sleet and freezing rain), is expected to cause a significant inconvenience, but not serious enough to warrant a warning.”
What People Are Saying
The National Weather Service forecast office, Great Falls, Montana said on X, Friday**:** “At 4:45 p.m., a cold front was moving through areas from Glacier County east along the H-line with a wind shift to the north and temps falling to the 30s and showers of rain changing to snow. Be prepared for quick changes in visibility as this front moves through N-central MT.”
NWS Spokane, Washington, said in a post on X, Friday**:** “This weekend the weather changes. Much of Saturday will be dry, but come Saturday evening into Sunday a wet system arrives. Rain and mountain snow becomes likely for most and winds will be a bit stronger. Main snow impacts SR-20 toward Washington Pass.”
NWS Riverton, Wyoming, said on X, Sunday**:** “Warmer temperatures this Sunday afternoon with strong winds likely, especially from South Pass to Casper. Mountain snow pushes in west of the Divide later today and overnight into Monday morning with passes to be affected, especially Togwotee.”
What Happens Next
At the time of writing, the latest winter weather advisory was in place until noon on Monday.
Regional NWS branches issue regular local forecast updates on the agency’s website and social media channels.
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