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

*** IMPORTANT ***  Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.

Significant River Flood Outlook


California Nevada River Forecast Center Regional Outlook

Flood Outlook Product


Definitions of Significant River Flood Outlook Categories:

  • POSSIBLE
    Hydrometeorological conditions indicate that significant flooding could occur. Such flooding is neither certain nor imminent.

  • LIKELY
    Hydrometeorological conditions indicate that significant flooding can be expected during the outlook period.

  • OCCURRING/IMMINENT
    Significant flooding is already occurring or is forecast to occur during the outlook period.

    Notice: The Significant River Flood Outlook is intended to provide a general outlook for significant river flooding within the CNRFC area of responsibility. It is not intended to depict all small-scale events such as localized flooding and/or flash flooding. This graphic will not depict minor river flooding as this implies only minimal or no property damage with possibly some public inconvenience. Please refer to the hydrological products issued by local NWS offices for official river forecasts and warnings. The CNRFC uses 5 days of forecast precipitation and temperature in our 5-day river guidance products.  This same information is reflected in this Significant Flood Outlook product.


National Outlook

   National Significant River Flood Outlook