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National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

Water Resources

Daily Water Resources Update Interface

Water Resources Update

Daily Water Resources Update


CNRFC Water Resources Google™ Maps Interface

A summary of several water resources forecast information, including observed flow to date for the water year, seasonal and yearly volume forecasts, and peak flow dates. Current and archived information is also available for several parameters going back several years for point and areal-averaged data. Also, KML files are available for download and use in Google™ Earth.

Water Resources Google™ Maps Interface


Legacy Water Supply Page

A collection of water supply-related links, including links to the legacy monthly water supply outlook publications issued by the CNRFC from 1996 through 2012.

Legacy Water Supply Page


Seasonal Runoff Forecasts

California Nevada River Forecast Center (CNRFC)

Peak 1-Day Streamflow Volume Observed (Since Apr 1) and Forecast (Until Jul 31) - Issued: Daily at 1:00 PM PST
10-Day Streamflow Volume Accumulation - Issued: Daily at 1:00 PM PST
20-Day Snowmelt Guidance - Issued: Daily at 1:00 PM PST
ESP Seasonal Forecasts - Issued: Daily at 1:00 PM PST
ESP Water Year Forecasts - Issued: Daily at 1:00 PM PST
ESP April-July Tracker - Issued: Daily at 1:00 PM PST
ESP October-September Tracker - Issued: Daily at 1:00 PM PST
North Coast ESP Streamflow Volumes - Issued: Daily at 1:00 PM PST
Upper Sacramento ESP Streamflow Volumes - Issued: Daily at 1:00 PM PST
Lower Sacramento ESP Streamflow Volumes - Issued: Daily at 1:00 PM PST
San Joaquin ESP Streamflow Volumes - Issued: Daily at 1:00 PM PST
East Side Sierra ESP Streamflow Volumes - Issued: Daily at 1:00 PM PST
Humboldt ESP Streamflow Volumes - Issued: Daily at 1:00 PM PST


Temperature Forecasts - (Issued Daily)

California Nevada River Forecast Center (CNRFC)

10-Day Maximum/Minimum Temperature Forecasts - Issued: Daily at 5:00 AM PST

Product Information:

  • Issued daily year-round.
  • Combination of latest NWS forecasts and Model Output Statistics (MOS) guidance from the NWS GFS model.
  • Used as an important input into the runoff models.