Arctic air driven by the polar vortex has prompted extreme cold warnings across parts of Indiana, Illinois, and West Virginia on December 14, 2025. Wind chills between −21°C (−6°F) and −30°C (−22°F) are producing dangerous conditions capable of causing frostbite on exposed skin within 30 minutes.
A series of atmospheric rivers are forecast to continue impacting the Pacific Northwest and spread southward into California through late December. Moderate risks of heavy precipitation, snow, and high winds are forecast across the West Coast between December 20 and 26, 2025.
Lake effect snow warnings are in effect for parts of New York, Pennsylvania, and Ohio through Sunday into Monday, December 14 into 15, 2025 as Arctic air driven by the polar vortex brings cold temperatures across the eastern U.S.
The Leavenworth Christmastown festival was cancelled after historic Washington floods triggered widespread power outages across Chelan County. Over 5 000 customers across the county, accounting for more than 11 000 people, were left without power due to the impacts of a major atmospheric river (AR). Power is expected to be restored for most customers by the evening of December 13, 2025, while debris cleanup and recovery efforts are expected to continue until next weekend.
Historic flooding caused by a major atmospheric river earlier this week impacted large parts of western Washington state, prompting evacuations, emergency declarations, and record river levels. As impacts from that event persist, another strong atmospheric river is forecast to reach the Pacific Northwest on Sunday, December 14, 2025, bringing a prolonged period of precipitation to Washington, Oregon, and northern California through mid-week.
New Jersey Governor Phil Murphy declared a state of emergency effective at 09:00 LT (14:00 UTC) on December 12, 2025, due to propane supply shortages affecting residential heating across the state. The declaration applies to approximately 186 000 residents who rely on propane-based heating systems.
The Skagit and Snohomish rivers rose to record levels on Friday, December 12, 2025, prompting evacuations and a boil-water notice in flood-affected areas.
A surge of Arctic air is forecast to move south from the Northern High Plains on Friday, December 12, 2025, driving near-record lows and dangerous wind chills across the Northern Plains and Mid-South through the weekend.
U.S. Coast Guard released videos of four people rescued from a flooded home in Sumas, Washington, on December 10, 2025, where 2.5–3 m (8–10 feet) waters had surrounded the property amid historic flooding.
Multiple atmospheric rivers brought widespread flooding to Snohomish County, Washington, this week, forcing water rescues and road closures as the Snohomish River approached its fourth-highest crest on record
