Sandpoint, ID – Dangerous avalanche conditions are threatening mountain regions across northern Idaho and western Montana through early Tuesday, as backcountry areas face heavy snowfall combined with rainfall that has rapidly destabilized snowpacks.
According to the Idaho Panhandle Avalanche Center, a Backcountry Avalanche Warning remains in effect until 6 a.m. Tuesday for Bonner and Boundary counties in Idaho, as well as areas in western Montana including the Whitefish, Swan, and Flathead Ranges. Officials say rain on top of several feet of snow is overwhelming weak snow layers at elevations above 4,000 feet, creating conditions ripe for both human-triggered and natural avalanches.
The affected zones include the Selkirk Mountains and Cabinet Mountains, where avalanches could break widely across slopes, run through tree-covered areas, and travel long distances.
The snow line is rising toward 7,000 feet, increasing exposure at mid-elevations. In Glacier National Park, especially near Lake McDonald and Marias Pass, rain below 6,500 feet has added to widespread instability.
Experts strongly urge avoiding all avalanche terrain. For updated maps and safety recommendations, visit idahopanhandleavalanche.org or flatheadavalanche.org.
Backcountry travelers are advised to exercise extreme caution, as conditions may remain volatile beyond the current warning window.
