Record Snowfall Causes Vessel Sinkings and Avalanche Risks in Juneau, Alaska

In December 2025, Juneau, Alaska, experienced unprecedented snowfall, accumulating over 200 cm (80 inches) due to multiple atmospheric rivers. This extreme weather led to significant disruptions, including the sinking of at least eight large vessels in the city's harbors. The National Weather Service (NWS) reported that December's snowfall reached a record 209 cm (82.3 inches), surpassing the previous record of 139 cm (54.7 inches) set in 1964. The heaviest single-day accumulation occurred on December 30, with 41.7 cm (16.4 inches) falling within 24 hours.

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The heavy, wet snow created hazardous conditions, with temperatures dropping as low as –23°C (–10°F). The weight of the snow caused significant structural strain, resulting in the sinking of vessels and raising concerns about stability and potential fuel spills. The U.S. Coast Guard issued warnings regarding the increased risk of capsizing due to heavy snow loads. Additionally, avalanche risks heightened in steep terrain surrounding Juneau, prompting the Alaska Department of Transportation to conduct hazard reduction operations along Thane Road.

Heavy snow and extreme weather cause sunken vessels and avalanche risk in Alaska

City services, including waste collection and airport operations, faced disruptions during the storm. The Juneau International Airport temporarily closed its runways for snow removal but has since reopened. The Juneau Docks and Harbors Department reported that crews were working around the clock to dewater and refloat affected vessels, although they faced resource limitations due to ongoing severe weather conditions. The city has also initiated short-term emergency positions to assist with snow removal efforts.

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Local officials have urged boat owners to take responsibility for snow removal on their vessels to prevent further sinkings. The Juneau Docks and Harbors Department emphasized the importance of individual action in mitigating risks associated with heavy snow accumulation on boats.

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While city officials confirmed that eight vessels had sunk, reports on the exact number of affected vessels varied slightly across sources. Additionally, while the NWS indicated that snowfall totals were unprecedented, some local reports suggested that the region typically experiences significant snowfall during December, complicating the narrative around the severity of this event.

Heavy snow and extreme weather cause sunken vessels and avalanche risk in Alaska

• “Our crews are running around the clock, using every de-watering pump available, and we are now rapidly running out of resources as conditions persist,” — Juneau Docks and Harbors Department

Heavy snow and extreme weather cause sunken vessels and avalanche risk in Alaska

• “Coast Guard warns that heavy snow can quickly reduce stability and cause vessels to sink, which can lead to property damage and pollution.” — U.S. Coast Guard

Heavy snow and extreme weather cause sunken vessels and avalanche risk in Alaska

• “DOT officials said that if avalanche debris reaches the roadway, an extended closure may be necessary.” — Alaska Department of Transportation

Heavy snow and extreme weather cause sunken vessels and avalanche risk in Alaska

As Juneau continues to recover from this extreme weather event, local authorities are monitoring conditions closely and preparing for potential further snowfall. The community remains on alert for avalanche risks and is working to restore normal operations in the wake of the storm's impact.

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