Live snowpack across the country.

# Arctic Alaska Primed for Significant Snowfall as Pacific Northwest Sees Light Accumulations

A modest snow event has unfolded across the Lower 48 over the past 24 hours, with Washington's Sawmill Ridge and Colorado's Vallecito each recording 2 inches of fresh powder. However, the real story is developing in Alaska's Brooks Range, where the next 48 hours promise substantial snowfall with forecasts calling for 6 inches at Imnaviat Creek and 4 inches at Atigun Pass. These Arctic systems are bringing challenging mixed precipitation conditions, with freezing fog and rain-snow transitions creating potentially hazardous travel conditions along the Dalton Highway corridor.

In the Cascade Range, Sawmill Ridge near Crystal Mountain and White Pass ski areas received a light dusting despite maintaining an impressive 170-inch base depth. The haze conditions transitioning to potential thunderstorms suggest unstable atmospheric conditions that could produce isolated convective snow showers, though nothing substantial is expected in the immediate forecast. Meanwhile, Colorado's Vallecito in the San Juan Mountains added 2 inches to its minimal 3-inch base, a welcome but insufficient addition for early-season skiing operations. The thunderstorm forecast for this region indicates warmer temperatures aloft, limiting snow potential to higher elevations above 11,000 feet.

The Brooks Range is where snow enthusiasts should focus their attention. Imnaviat Creek, positioned along Alaska's North Slope, is forecast to receive the nation's heaviest snowfall with 6 inches expected amid areas of fog and mixed precipitation. Just 35 miles south, Atigun Pass—the highest mountain pass in Alaska at 4,739 feet—should accumulate 4 inches despite challenging freezing fog conditions that will significantly reduce visibility for truckers servicing Prudhoe Bay's oil operations. Even Prudhoe Bay itself, typically too cold and dry for significant precipitation, may see 2 inches as this moisture-laden system pushes northward from the Chukchi Sea. These totals are remarkable for the Arctic environment, where annual snowfall averages just 30-40 inches. The mixed rain-snow nature of this event suggests temperatures hovering near freezing, creating dense, wet snow that will pack exceptionally well—ideal for Arctic research stations monitoring snowpack evolution but potentially troublesome for infrastructure and transportation networks across Alaska's remote northern frontier.