July snow lingers on Alaska's Dalton Highway after Atigun Pass advisory

Lead

A Winter Weather Advisory from the National Weather Service in Fairbanks covered Atigun Pass and a stretch of Alaska’s Dalton Highway in late July, calling for roughly 2 to 6 inches of snow and a light glaze of ice before the product expired at 4:13 a.m. Alaska time on Monday, July 28.

Search interest for alaska highway summer snow alert ranked 13 on the 30 Jul 2026 Google Trends pull, days after the Fairbanks Winter Weather Advisory expired, sitting beside appleton tornado and japan earthquake on the same weather-heavy board.

What the advisory covered

Reporting citing the Fairbanks forecast office said the advisory applied to the Central Brooks Range, including Atigun Pass, Anaktuvuk Pass, Galbraith Lake, and the Dalton Highway from mile post 232 to mile post 322. Atigun Pass rises to about 4,739 feet and is the only year-round road crossing of the Brooks Range, with north-side grades reported as steep as 12 percent.

TechTimes and Rolling Out both described overnight cold behind the snow: temperatures near 26 degrees at the pass, north winds gusting near 34 mph, and wind chills near 11 degrees. Automated snow gauges across the Brooks Range were still reading about 1 to 5 inches on the ground after the advisory lapsed.

Why summer snow is different here

Alaska DOT&PF’s Dalton Highway page notes that winter conditions can run from early August through June and that the road has seen snow in July. Officials point drivers to 511.alaska.gov and to programmable message boards on both sides of Atigun Pass, because the corridor has no cell service and Coldfoot is the last fuel stop for a long stretch toward Deadhorse.

Outlets covering the event focused less on accumulation totals than on overnight refreeze: warm July pavement can melt the first snow, then overnight temperatures below freezing turn that meltwater into a hard-to-see glaze on the grade. Autoblog’s July 30 update said snow cover was still showing on Brooks Range gauges days later, with rain on cold ground and nightly dips toward freezing keeping ice risk alive even without a new winter product.

Official status midweek

The National Weather Service Fairbanks office page on July 30 showed no active Winter Weather Advisory for the corridor. Alaska DOT&PF still treats Atigun conditions as something travelers should check before committing, through 511 and the pass message boards, rather than assuming late July means summer pavement.