The Snow and Water Interactive Map displays both current and historic hydrometeorological data in an easy-to-use, visual interface.
Snow and Water Interactive Map
The Snow and Water Interactive Map displays both current and historic hydrometeorological data in an easy-to-use, visual interface. The information on the map comes from many sources. Natural Resources Conservation Service snowpack and precipitation data are derived from manually-collected snow courses and automated Snow Telemetry (SNOTEL) and Soil Climate Analysis Network (SCAN) stations. Other data sources include precipitation, streamflow, and reservoir data from the U.S. Bureau of Reclamation (BoR), the Applied Climate Information System (ACIS), the U.S. Geological Survey (USGS), and other hydrometeorological monitoring entities. Information supplied by the map is updated three times daily.
The Interactive Map has two regions: the map display (on the left) and the map controls (on the right). You use the map controls to determine both the display mode and the types of data and stations to show on the map.
Predefined Maps: Station and/or Basin Conditions
To help you get started with the Interactive Map, here are links to predefined maps organized by data type. After opening a map, you can zoom to your area of interest, customize the map, and then bookmark the URL to save your settings. Show current conditions for stations, basins or both.
Snow
- Snow Water Equivalent > Percent of 1991-2020 Median > Stations Only | Basins Only | Stations and Basins
- Snow Water Equivalent > Percent of 1991-2020 Median > Beginning of Month (SNOTEL and Snow Course) > Stations Only | Basins Only | Stations and Basins
- Snow Water Equivalent > Percentile Compared to Period of Record (POR)
- Snow Water Equivalent - Records
- Snow Depth - 3-day delta
- Snow Depth - 7-day delta
- Snow Depth
- Snow Density
Precipitation
- Month-to-Date > Percent of 1991-2020 Median > Stations Only | Basins Only | Stations and Basins
- Water Year-to-Date > Percent of 1991-2020 Median > Stations Only | Basins Only | Stations and Basins
- Water Year-to-Date > Percentile Compared to Period of Record (POR)
- Water Year-to-Date Records
Streamflow
- Adjusted Volume - Observed > Previous Month > Percent of 1991-2020 Median
- Adjusted Volume - Observed > Water Year-to-Date (End of Previous Month) > Percentile
- Adjusted Volume - Forecast > Current (January through June) > Stations Only
Reservoir Storage
- End of Previous Month > Percent of 1991-2020 Median
Forecast Verification
- April 1, 2022 50% Exceedance Forecast Error as Percent of NRCS Median
- April 1, 2022 Observed Streamflow Exceedance Probability Category
Soil Moisture/Temperature
- Soil Moisture > Percentile > 10 Year Period of Record (POR) > 2 Inch Depth | 8 Inch Depth
- Soil Temperature > Percentile > 10 Year Period of Record (POR) > 2 Inch Depth | 8 Inch Depth
Predefined Maps: Station Inventory
Identify stations by data type, location, network
Snow Survey and Water Supply Forecasting Program
NRCS hydrologists manage a comprehensive network of manually-measured snow courses and automated Snow Telemetry (SNOTEL) monitoring sites throughout the West, manage the data collection process, and estimate the runoff that will occur when it melts.
Publications of the National Water and Climate Center
Articles, reports, and help files published by the National Water and Climate Center and the Snow Survey and Water Supply Forecasting Program.
