National Weather Service United States Department of Commerce
Precipitation Forecasts
Precipitation Forecast & Discussion (QPS):
Issued Routinely November to April, or as needed

Precipitation Forecast Graphics (CNRFC):

National Excessive Rain Outlook (WPC)
Extended Outlooks

Precipitation Observations
Tables (Not checked for accuracy):

Mapped Precipitation
Historical Reports
River & Streams Forecasts
Southwest California Rivers
Ventura County Rivers & Streams
California Rivers
California Streams (USGS)
National Rivers
River & Streams Observations
Ventura County
Santa Barbara
San Luis Obispo County

United States Drought Monitor
Drought Outlook (CPC)
California Reservoirs
California Seasonal Rainfall Maps
National Snowpack Maps
California Groundwater Map
Drought Fact Sheet
Drought Tools and Information

Projects & Programs
Debris Flow Program
Story Maps

Partners & Information

Los Angeles County Department of Public Works
Ventura County Watershed Protection District
Santa Barbara County Water Resources Division
San Luis Obispo Dept of Public Works
California/Nevada River Forecast Center (CNFRC)
California Department of Water Resources
California State Climatologist
US Army Corps of Engineers
Turn Around Don't Drown Program
Flood Informational Brochures
Hydrology Program (pdf)
AHPS Hydro Program (pdf)
Levee Information (pdf)