The following Interactive Map links display current and historical conditions for snow water equivalent, snow depth, snow density, precipitation, reservoir storage, streamflow volumes, and forecasted streamflow volumes collected by the Natural Resources Conservation Service and other monitoring agencies.

The Interactive Map has many custom data analysis capabilities using different duration periods. The data in the map can be exported as a .csv file to a spreadsheet using the option in the left sidebar menu. For more information about how to use the tool go to the Interactive Map Help Center.

Current Snow Water Equivalent

• Station Data: Values | % of Median  | Anomaly | Percentile | Records | Median
• Station Deltas -  1 day   |   3 day   |   7 day   |   14 day  |   30 day
• Basin Conditions: Today's Snow Water Equivalent as % of Median (SNOTEL only)
• Basin Conditions: First of Month Snow Water Equivalent as % of Median (SNOTEL + Snow Course)

Precipitation

• Cumulative Precipitation (for last X days) -  1 day  |   3 days   |   7 days   |   14 days  |   30 days
• Water Year to Date: Values | As % of Median | Anomaly | Percentile | Records | Average
• Month to Date:        Values | As a % of Median | Anomaly | Percentile | Records | Average
• Basin Conditions: Today's % of Median Water Year Precipitation
• Basin Conditions: Last month's % of Median Monthly Precipitation

Snow Depth:        Values   |     Deltas -  1 day  |   7 days   |   14 days  |   30 days

Snow Density:      Values   |    Deltas -  1 days  |   7 days   |   14 days  |   30 days

Soil Moisture Values:  -                     2 inch  |    8 inch   |  20 inch   

Soil Moisture % of POR Average:      2 inch  |    8 inch   |  20 inch  

Snow Course Data (latest month)

• Snow Water Equivalent:      Values | As a % of Median  |  Percentile | Records | Median  
• Snow Depth:                        Values
• Density:                                Values  

Valley Precipitation (Based on most recent monthly data collected by ACIS)

• Water Year Precipitation: Values | % of Median | Anomaly | Percentile | Records (Period of Record - POR) | Median (1991-2020)
• Last Month's Precipitation: Values | % of Median | Anomaly | Percentile | Records (Period of Record - POR) | Median (1991-2020)

Reservoir Storage (Based on most recent monthly data)

• End of Previous Month:  Storage Volume   |   % of Median  |  % of Capacity
• Delta:  1 month  |   2 month   |   3 month

Streamflow Volume (Based on most recent monthly data, expressed as an adjusted volume)

• Water Year to Date Volume    |   % of Median
• Last Month's Volume                |   % of Median

Seasonal Streamflow Volume Statistics

• 1991-2020 Median Streamflow Volume:            April - July Median      |   Water Year Median
• 1991-2020 Average Streamflow Volume:          April - July Average      |   Water Year Average
• Records (based of period of record):                 April - July  Min / Max   |    Water Year   Min  /  Max

Seasonal Streamflow Forecasts  (Last publication month - 50% Exceedance Forecast)

• Most Recent Streamflow Forecast Map PDF
• Primary Period Forecast Volume   |   % of '91-20 Median  |  % of '81-10 Average
• Primary Period Forecast Percentile (compared to past observed volumes)
• April - July Forecast Records (compared to past observed volumes)

Station Inventory

• NRCS Stations:   SNOTEL   |   SCAN   |    SNOLITE 
• NRCS / California Cooperative Snow Surveys:   Snow Courses / Aerial Markers
• Other Networks:   Reservoir   |   Streamflow Gaging   |   ACIS (NWS Valley Coop Precipitation)