Four back-to-back atmospheric rivers are forecast to make landfall along the U.S. West Coast between November 3 and November 9, 2025. Heavy rainfall totals of 76–130 mm (3–5 inches), with isolated amounts up to 177 mm (7 inches), could lead to localized flooding in parts of northern California and Washington State throughout the week.
Multiple spin-outs were reported along the I-80 near Truckee through the night of October 16, 2025, as a Pacific storm dropped the first heavy snow of the season over the Sierra Nevada. Chain control has been implemented at the Donner Summit, along the I-80, and US 50.
A Pacific storm will move into California from the northwest between October 13 and 15, 2025, bringing widespread valley rain and heavy snow to the Sierra Nevada. Snowfall totals along the Sierra crest may reach 30–90 cm (12–36 inches), with hazardous driving conditions expected across Interstate 80 and other major passes. The National Weather Service warns that chain controls and travel delays are likely during the peak of the event.
California has experienced the third consecutive year with near or above average snowpack this year after 25 years.
The Center for Western Weather and Water Extremes has warned of an intense winter storm impacting the Southern Sierra Nevada and parts of the Intermountain West from November 25 to 28, 2024. Forecasts indicate over 180 mm (7 inches) of precipitation and snow accumulations exceeding 1.5 m (5 feet) at higher elevations, with flash flood and winter storm warnings in effect.
A powerful atmospheric river impacted the US West Coast from February 29 through March 3, 2024, dropping massive amounts of snow to the Sierra Nevada.
A significant winter storm continues to impact much of the West on Sunday, March 3, 2024, with heavy mountain snow and widespread damaging winds, including dangerous, blizzard conditions in the Sierra Nevada.
A prolonged period of heavy snow falling over the Sierra Nevada mountain range since December 10 dramatically increased its snowpack and by December 27 piled up to 455 cm (193.7 inches) at the UC Berkeley's Central Sierra Snow Laboratory. At the University of…
A large and slow-moving late-season winter storm started dumping significant heavy snow on California's Sierra Nevada on Saturday, March 14, 2020. Up to 1.8 m (6 feet) of snow is expected in the following days, replenishing the mountains following the…
An unusually strong and cold low pressure system caused several daily low temperatures and precipitation records to be set on Monday, June 12, 2017 across central and northern Nevada. On the same day, state's mountainous regions received an estimated 6 – 12…
