Western US SWE Reports

Western US snow water equivalent maps

This research product provides near-real-time estimates of snow-water equivalent (SWE) for the western United States at a spatial resolution of 500 m.

We create reports for specific regions weekly from mid-winter through the end of the melt season. The reports are released within a week of satellite image data acquisition and are distributed to water managers and forecasters.  For more information on reporting or to discuss reporting for your area, please contact Emma.Tyrrell@colorado.edu. For feedback on our reports or to be added to our mailing list, please fill out this form

See also:
Sierra Nevada SWE reports 2019-present (California)


Intermountain West SWE reports 2019-2023 (Colorado, Utah, Wyoming) 


2026

Feb 01 (PDF | Tables JPG maps zip)
Feb 08 (PDF | Tables JPG maps zip)
Feb 15 (PDF | Tables JPG maps zip)
Feb 22 (PDF | Tables JPG maps zip)
Mar 01 (PDF Tables JPG maps zip)
Mar 08 (PDF Tables JPG maps zip)
Mar 15 (PDF Tables JPG maps zip)
Mar 22 (PDF Tables JPG maps zip)
Apr 01 (PDF Tables JPG maps zip)

2025

All Files for 2025 (2025 zip)
Includes: Report, Tables All Domains, JPG maps