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.
Deterministic 5-Day Forecasts 

Data updated:
Ensemble Forecasts
Data updated:


Peak Exceedance Probabilities*
Data updated:
10%25%50%75%90%
5-Day Peak
10-Day Peak
*Exceedance probabilities are only available for selected forecast points.
Observed Data
Data updated:

Latest Hour 1 Hr Ago 2 Hrs Ago 3 Hrs Ago
Forecast Points
Other Points
Reservoirs
Deterministic Forecast + Observed Data
Fcst data updated:
Obs data updated:
Forecast Points 
Link to




Significant River Flood Outlook
Data updated:
Valid:

      National Significant River Flood Outlook
Data updated (unless otherwise noted):

Statistic for % normal:

 

 




Monthly Archive
Month/Year:     
Statistic for % normal:

Reservoir Storage
(Data to 1925 for all reservoirs/1951 for "major")
% Normal % Capacity
HEFS Verification Product Help



National Gridded Data



Select date:     To:
Selected date: 06/01/2025
Point Data
Data updated:
SWE
SWE Change




Data updated:
Snow Depth
Snow Depth Change
Daily Archive (Data back to Apr 2014)
M/D/Y:     
  Basin Elevation Zones % Avg % Apr 1
Avg		 Value
Simulated
Basin
Avg		 Middle/Upper
Lower/Only
All Zones
Monthly Archive (Data back to Jan 1998)
Month/Year:     
  % Avg Value
Point*
* Jan-Jun only prior to 2019.
Radar Data
 
 


Select radar time:  

Short-Range Point Data

Raw data updated:
QC data updated:   
Most Recent Hours (Raw):














6-Hour Totals (QC'd = Quality-Controlled)
Ending 18Z (11 AM PDT) Ending 00Z (5 PM PDT) Ending 06Z (11 PM PDT) Ending 12Z (5 AM PDT)
 
  
  
  
24-Hour Totals (QC'd = Quality-Controlled)


Short-Range Gridded Data
Images created:






     
Monthly/Water Year Archive (starts Oct 1996)
Month/Year:     
What is a Water Year?
    % Avg Value Departure Avg
Point Month
   
WY
   
Grid Month
WY
Basin
Avg		 Month
     
WY
     
HUC8
Avg		 Month
     
WY
     
Forecast
Group		 WY
     


 From Water Year:   to: 
CNRFC Forecast Data
Forecast issued:
 
 

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WPC Forecast Data
Day 1 issued:
Day 2 issued:
Day 3 issued:
Days 1-3 issued:
Days 1-7 issued:
WPC 6-Hourly QPF
Select forecast time:  


WPC 24-Hourly QPF
Select forecast time:  


WPC 72-Hourly QPF

WPC 7-Day QPF
Point Data
Data updated:
QC data updated:
Instantaneous Temperatures
Temp Change:
Max/Min Temperatures
24-Hour Max
Ending 12Z
(5 AM PDT)		 24-Hour Min
Ending 12Z
(5 AM PDT)		 Daytime
Max *		 Overnight
Min **
* Updated: 10 PM   **Updated: 10 AM  
Gridded Data
Images created:
 
 

Select obs time:  







Basin Temperature Plots
Images created:


Forecast Temperature Grids
Images created:




  







  




Observed Freezing Levels
Images created:
  

Select forecast time:  


Forecast Freezing Levels
Forecast issued:
  

Select forecast time:  


Flash Flood Guidance Grids
Images created:



Note: Recent burn areas are typically more vulnerable to flash flooding and debris flows. Check with your local NWS Forecast Office for fire specific guidance.

Post-Wildfire Debris-Flow Basin Probability
Debris Flow Probability (peak 15-min rainfall intensity of 24 mm/hr)

More info: USGS post-wildfire debris-flow hazards
Data updated:






U.S. Drought Monitor

Select issuance date range:
From:     To:
Selection Valid: 05/27/2025   Issued: 05/29/2025

Climate Prediction Center Outlooks
Drought Outlooks
Extended Range Outlooks
Precipitation
Temperatures
Long Lead Outlook
Precipitation
24-Hour QPF Verification Grids
Images created:
Date: (ending 4am PST / 5am PDT) Select forecast to verify:
Day 1 forecast created Sat May 31, 2025


    QPE    
QPF
Last updated:

File Downloads


Current and Archived Point Data
Data Type and Duration:

 Month/Year:    

 
Current and Archived Area Data
Data Type and Duration:

 Month/Year:   


Download QPF Verification Data

Date: (ending 4am PST / 5am PDT)


Download U.S. Drought Monitor Data

Issuance date:

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 Temp. Change Filter:  to °F

Daily Water Resources Update

    Web content below courtesy of:  NOAA
 Other Resources 
Step one Select data type below:
Step two Select product below:


Click for more options
 

Statistic for % normal:

Created:

Marker size scaled by average yearly flow.
 
Toggle data table on/off.Download map as PNG image.

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Note 1 About Product:

This product is updated daily with current water year forecasts plotted.

Note 2 About Product:

Most recent Official or Raw ESP Water Supply Forecast during the current water year is plotted.
 

Alternate Text Products:

Official Water Supply Text Forecast   |   ESP Water Supply Seasonal Forecast   |   ESP Water Year Forecast   |   Observed and Forecast Peaks
Current and Archived Point Data
Data Type and Duration:      Month/Year:   

Current and Archived Area Data
Data Type and Duration:      Month/Year:   


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US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
California Nevada River Forecast Center
3310 El Camino Avenue, Room 227
Sacramento, CA 95821-6373
(916) 979-3056

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