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Snow Survey

Washington Snow Survey Program

The NRCS Snow Survey Program provides mountain snowpack data and streamflow forecasts for the western United States.  Common applications of snow survey products include water supply management, flood control, climate modeling, recreation, and conservation planning.
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Interim Issue Resolution: Air Temperature Data Bias

The extended range air temperature sensors used at SNOTEL sites in the continental U.S. calculate temperature from sensor output voltage using a linear least-squares regression algorithm. It has been determined that use of the linear least-squares regression algorithm has resulted in a data bias.The Snow Survey and Water Supply Forecasting Program is actively working on a correction technique for this issue.

More Information: Air Temperature Bias Correction Metadata and Resources


Snow Survey Data, Products, and Reports

Snow & Precipitation
Water Supply

Water supply outlook reports, Streamflow forecasts and Reservoir storage


Soil moisture/temperature data, climate information/summaries, and wetlands analysis...

Interactive Map

Includes popup graphics for current SNOTEL and Basin conditions

Additional Snow Survey Information & Quick Links