Atmospheric River to Bring Rain to California
Forecasters expect the first atmospheric river of the season to reach California around November 11-16, with Sierra snow possibly reaching several feet.
Updated on Nov. 5, 2026 in Current Conditions
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The first atmospheric river of the season is forecast to reach California in the window of approximately November 11-16, 2026, after a week of dry, stable weather. Rain is likely to last one or two days, and some Tahoe-area resorts are set to open early.
Why it matters
The storm could deliver Sacramento's entire November rain average in a short window and bring substantial Sierra snowfall to the state's mountain communities. Forecasters link the pattern to El Niño, which is expected to keep squeezing moisture into atmospheric rivers.
Forecasters project rain in California during roughly November 11-16, lasting one or two days, with Sacramento possibly receiving nearly two inches, its full November average. Sierra snow could reach several feet in places, though the precise totals remain unconfirmed.
The details
A low-pressure system spinning in the Gulf of Alaska is expected to be pulled south as a stable atmosphere moves east, becoming saturated with moisture to form an atmospheric river. Upper-level patterns show high pressure over the central United States shaping the setup, while El Niño is locking into the atmosphere and producing persistent wet patterns.
Timeline
Next seven days from publication: dry, stable weather with daytime highs in the upper 60s to low 70s
Approximately November 11-16, 2026: probable window for atmospheric river rain in California
January 2027: rain events expected to occur nearly weekly
Seasonal Patterns
El Niño is continuing to strengthen over the next month or two, and forecasters expect it to keep funneling moisture into atmospheric rivers that could bring rain events nearly weekly by January. This sets the first storm of the season against a pattern that is expected to persist well beyond this single system.
Residents in Sacramento and the Sierra should expect rain lasting one or two days around November 11-16 and check conditions before traveling to mountain areas. Tahoe-area resorts opening early may make mountain travel more practical for winter visitors.
The takeaway
Expect a short but significant storm window in mid-November and plan for a pattern of recurring rain as El Niño strengthens through the winter.
What happens next
Rain events are expected to occur on a nearly weekly basis by January 2027, and the window of November 11-16 is the next probable atmospheric river event.
Further reading
Track live rain and snow reports in the Current Conditions section for California.
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