Live snowpack across the country.

# Arctic Storm Brings Fresh Snow to Alaska's North Slope as Lower 48 Sees Modest Activity

A developing weather system is poised to deliver significant snowfall across Alaska's remote North Slope over the coming days, with Imnaviat Creek leading forecast totals at 6 inches, while the Lower 48 experiences only scattered accumulations. The past 24 hours brought modest 2-inch accumulations to Washington's Sawmill Ridge in the Cascades and Colorado's Vallecito region, though neither location suggests the start of a sustained pattern. For snow enthusiasts seeking powder, attention should turn northward to Alaska's Brooks Range, where a potent mix of moisture and cold air is creating ideal conditions for accumulation across one of North America's most remote landscapes.

The most impressive forecast centers on Imnavait Creek in Alaska's North Slope Borough, where 6 inches of new snow is expected amid rain/snow mix and areas of fog at 68.6°N latitude. Just 35 miles southeast, Atigun Pass—the highest point on the Dalton Highway and gateway to Prudhoe Bay's oil fields—is forecast to receive 4 inches through a combination of rain, snow, and freezing fog before transitioning to scattered precipitation. These totals are particularly noteworthy given the minimal existing base depths of just 1-2 inches, suggesting this system represents the season's first substantial accumulation event for Alaska's Arctic region. Prudhoe Bay itself, situated along the Arctic Ocean at 70.3°N, rounds out the forecast with 2 inches expected, though a transition to rain may limit totals in this coastal location.

Meanwhile, recent observations from the Lower 48 paint a quieter picture. Washington's Sawmill Ridge, located in the central Cascades east of Seattle at 4,500 feet elevation, recorded 2 inches over the past day atop a substantial 170-inch base—impressive depth but minimal fresh accumulation. Colorado's Vallecito observation site in the San Juan Mountains reported an identical 2 inches, though concerning is the meager 3-inch base depth and forecast for thunderstorms rather than continued snow. Neither location shows additional accumulation in extended forecasts, leaving Alaska's North Slope as the nation's clear winner for fresh powder. For researchers and backcountry enthusiasts willing to venture into extreme terrain, the Brooks Range corridor offers the most dynamic snow event currently unfolding across North America.