Idaho ski areas

## Arctic Alaska Braces for Significant Snowfall as Lower 48 Sees Modest Activity

Snow enthusiasts looking for the most promising conditions should turn their attention northward to Alaska's Brooks Range, where a potent weather system is poised to deliver the heaviest snowfall across the nation over the next 48 hours. While the Lower 48 has recorded modest accumulations in Washington's Cascades and Colorado's San Juan Mountains over the past day, the real story is unfolding along Alaska's North Slope, where Imnaviat Creek leads the forecast with an impressive 6 inches of new snow expected amid rain-snow mix and dense fog conditions. This Arctic system will impact critical infrastructure along the Dalton Highway corridor, with Atigun Pass—a notorious high-elevation crossing—anticipating 4 inches of accumulation combined with treacherous freezing fog that will challenge travelers and commercial haulers alike.

The recent 24-hour observation period has been relatively quiet across the continental United States, with Sawmill Ridge in Washington's central Cascades recording 2 inches of new snow atop a substantial 170-inch base. This location near the Snoqualmie Pass area continues to maintain excellent mid-season conditions despite the modest recent additions, though thunderstorm activity may transition the precipitation to rain at lower elevations. Meanwhile, Colorado's Vallecito in the San Juans matched that 2-inch total but operates on a significantly thinner 3-inch base, highlighting the challenging snow year much of the southern Rockies has experienced. The forecast shift toward thunderstorms suggests warmer air is infiltrating these regions, potentially limiting additional accumulation in the near term.

The most dynamic winter weather clearly belongs to Alaska's remote northern reaches, where maritime moisture colliding with Arctic air masses creates ideal snow production. Prudhoe Bay, situated along the Arctic Ocean coast, rounds out the forecast with 2 inches expected, though the marginal temperatures there threaten to mix precipitation types between snow and rain. For researchers and snow enthusiasts tracking atmospheric patterns, this Alaska system represents a classic late-season Brooks Range event, where orographic lift along the mountain spine wrings out moisture before it reaches the coastal plain. These accumulations, while modest by mid-winter standards, are significant for late-season travel and wildlife migration patterns across this vast wilderness corridor.