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)
Apr 05 (PDF | Tables | JPG maps zip)
Apr 12 (PDF | Tables | JPG maps zip)
Apr 19 (PDF | Tables | JPG maps zip)
Apr 26 (PDF | Tables | JPG maps zip)
May 01 (PDF | Tables | JPG maps zip)
May 10 (PDF | Tables | JPG maps zip)

2025

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