


The data is also shared with the National Weather Service and the California Department of Water Resources to support weather and flood forecasts and warnings in the region. 48 hour rainfall totals through 4 am Monday morning.

The current regional system is designed to share data between agencies, including local municipalities such as Sacramento County, Placer County, and the City of Roseville. The tables below give yearly averages for rainfall at cities in California. The City of Folsom owns and maintains multiple rain and stream gauges within the city that are part of a region-wide ALERT system of automated rain gauges, stream gauges, and weather stations. Average Annual Precipitation for Cities in California.
