Boise, Idaho – A prolonged late-January winter pattern could bring heavy mountain snow and difficult travel across the Idaho–Montana–Wyoming region as colder air and active storm tracks settle over the Northern Rockies.
According to the National Weather Service Climate Prediction Center, parts of Idaho, Montana, and Wyoming fall under a slight risk for heavy snow from Saturday through the following Friday, signaling an increased chance for one or more impactful winter systems. The risk is highest in higher elevations but extends into nearby valleys during stronger storms.
In Idaho, including the Boise area and stretches of southern and central Idaho, colder-than-normal temperatures increase the likelihood that precipitation falls as snow, especially during overnight and early morning hours. Snow-covered roads could impact travel along Interstate 84 and mountain passes leading north and east.
Across Montana, including Billings and surrounding south-central counties, repeated rounds of snow could affect Interstate 90 and U.S. Highway 212, with reduced visibility possible during heavier bursts. Farther south in western Wyoming, including Jackson and the Tetons, elevation-driven enhancement strongly favors accumulating snow, potentially creating hazardous conditions on Teton Pass and U.S. Route 26.
State transportation agencies across the region urge travelers to monitor pass conditions, carry winter survival kits, and be prepared for rapidly changing weather in mountainous terrain. With sustained cold expected, snow that falls is likely to persist.
More detailed snowfall outlooks and potential winter weather advisories are expected as the late-January window approaches, with confidence increasing by early next week.
