California–Nevada River Forecast Center — River Crests for the Whole State

This is the office that actually produces California’s river forecasts, and going to the source gets you far more than a summary. It issues bulletins by basin — Upper and Lower Sacramento, San Joaquin, Russian and Napa, North Coast, Central Coast, Southern California, Eastern Sierra and Humboldt — alongside Delta tidal forecasts, flash flood guidance, snow analysis and ensemble streamflow predictions used for water management. For a household, the useful move is to find your basin once and bookmark that bulletin. For anyone tracking drought and flood together, the same office covers both, since snowpack and runoff drive each.

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