Northern California has been impacted by a series of powerful atmospheric river storms that began in late December 2025 and continued through the first week of January 2026. As of January 6, 2026, the most intense rainfall has passed, but residual flooding effects persist across the Sacramento Valley region.

Northern California is under a prolonged, high-impact atmospheric river pattern bringing several days of heavy rain, and flooding concerns from the Sacramento Valley through the northern San Joaquin Valley. Sacramento, Elk Grove, Lodi, and Stockton are all under flood watches, through at least December 26