United States Department of Agriculture, Natural Resources Conservation Service
SNOTEL and snow course network — snow water equivalent
Automated stations across the mountain west and Alaska that weigh the snowpack on a pressure pillow every day, reporting the depth of water held as snow rather than the thickness of the snow. The measurement that water supply forecasting in the western United States is built on, with the earliest stations reporting from 1937.
Rights
- Commercial reuse
- Yes
- Redistribution
- Yes
- Derivative use
- Yes
- Attribution required
- No
- Restrictions
- Applies to material authored by US federal agencies. Third-party material carried within a federal product may be separately protected.
- Terms last checked
- 23 August 2026
Access and coverage
- Publisher
- United States Department of Agriculture, Natural Resources Conservation Service
- Geographic coverage
- The mountain west and Alaska
- Temporal coverage
- 1937 onwards
- Update frequency
- daily
- Formats
- json, api
- Bulk download
- Available
- Registration required
- No
- Cost to Hydrionis
- Free
- Domains
- snow ice
What Hydrionis holds from this publisher
The publisher’s own coverage is above. This is what Hydrionis has actually taken from it, at the subjects it measures — gauges, boreholes, reservoirs or places.
375,923
Values held
847
Series, each one measurement at one place
847
Subjects measured
1963–2026
Period actually held, not the publisher’s span
What is measured
- Snow water equivalent · mm
How current it is
- Current
- Read from NRCS 2 days ago, and the newest monthly value covers 2026-08 — as current as this source gets.
Hydrionis products built from it
Where this publisher’s data reaches a reader. Each has its own page, with its licence and how to cite it.