An atmospheric river triggered multiple debris flows and flash floods across California after it brought heavy rains and mountain snow to much of the state on Thursday, February 13, 2025. Multiple flood alerts and evacuation warnings were issued, with the local authorities reporting widespread damage and multiple rescues.
An atmospheric river is forecast to bring heavy precipitation to California today and in the coming days, with significant snowfall expected in the Sierra Nevada and flood risks across multiple regions.
A Flash Flood Watch has been issued for Los Angeles through Thursday, February 13, 2025, ahead of the atmospheric river forecast to bring heavy rainfall to the region.
A strong atmospheric river (AR) associated with a low-pressure system is set to impact California from Wednesday into Thursday, February 12 to 14, bringing heavy rain, mountain snow, and potential flooding. The National Weather Service (NWS) warns of significant precipitation and winter storm conditions, particularly in the Sierra Nevada and coastal mountain ranges.
A strong atmospheric river (AR) is forecast to bring heavy rainfall and colder temperatures across California this week starting Tuesday night, February 11, 2025, with the heaviest precipitation expected in southwestern parts of the state through Thursday, February 13.
At least two people have been reported dead in Sonoma County due to the storms triggered by atmospheric rivers that have been affecting the region since January 31, 2025, leading to landslides and house collapses across the region.
Two atmospheric rivers have battered the U.S. West Coast since January 31, 2025, bringing record rainfall to San Francisco and triggering landslides and flooding across California. At least one person was hospitalized.
A strong atmospheric river (AR) is set to bring heavy rainfall to northern California starting Sunday, February 2, 2025, with forecasts indicating up to 380 mm (15 inches) in the Sierra Nevada, increasing the risk of flash floods and debris flows near the burn scars.
An extended period of landfalling atmospheric river (AR) activity will bring heavy precipitation to Northern and Central California starting January 31, 2025, and continuing into the following week. The event is expected to cause significant hydrologic impacts, with heavy rain, high-elevation snow, and potential flooding.
Forecast confidence in a high-impact atmospheric river (AR) event has steadily increased since January 27, 2025, and CW3E is now warning about a major AR event expected to begin this Friday, January 31 along the U.S. West Coast, and potentially continue into early next week. The most recent forecast from the NCEP Global Ensemble Forecast System (GEFS) is showing >50% probability of an AR 4 or greater over along the California coast between Santa Cruz and Mendocino Counties.
