This forecast was created at 1:30 p.m. PST on Friday, March 28, 2025.
An active stretch of weather will unfold over the Northern Rockies through next week, bringing multiple waves of mountain snowfall that should keep surfaces fresh and conditions fairly wintry across Idaho, Montana, and Wyoming. In particular, southwestern Montana and portions of central Idaho look primed for the healthiest accumulations through the weekend, with another round of region-wide snow likely returning Monday into Tuesday. Snow levels will fluctuate day to day but remain low enough for mountain snow to dominate, and modest to occasionally higher snow-to-liquid ratios will keep the quality decent. A brief lull midweek leads into more unsettled weather, while extended outlooks suggest temperatures may stay near or slightly below normal for early April, maintaining a decent spring snowpack.
Friday–Saturday Storm Showers are already developing across the region, with modest accumulations expected by Saturday. Snow levels in Idaho will range mostly between 4,000 and 6,000 feet, remaining high enough that only the upper portions of many mountains see meaningful snowfall. Southwest Montana will be a notable exception on Saturday, where colder air lowers snow levels significantly and leads to heavier mountain accumulations. Overall, the snow will be modest in most spots but should freshen surfaces, with snow quality on the fair side (roughly 9–12:1 ratios) in central Idaho and southwestern Montana…