Snowpack
Snow season overUpper Colorado River Basin snowpack
Basin snow water equivalent vs the 1991-2020 median, 137 SNOTEL stations
Data through Sep 2, 2026 · source last checked Sep 10, 2026 · page revised Sep 3, 2026
Cite
- This snow year
- 1991-2020 median
About this data
- Source
- USDA NRCS SNOTEL (Air-Water Database)
- Series
- Snow water equivalent (WTEQ), basin-index percent of the 1991-2020 median
- Geography
- Upper Colorado River Basin
- Unit
- in
- Calculation
- Daily reading, aggregated across reporting SNOTEL stations
- Last observation
- Jun 11, 2026
- Update frequency
- Daily in season (Oct-Jun); melts out by mid-summer
Snow year complete. Upper Colorado River Basin's snowpack peaked at 8.8 in of snow water equivalent around Mar 8, 2026, 59% of the normal peak. The 2027 snow year begins October 1.
The Upper Colorado River Basin peaked at 8.8 in of snow water equivalent on Mar 8, 2026, 59% of the normal peak. Water-year precipitation totaled 24.2 in, 85% of the median. The snow year is now complete.
| Measure | Value |
|---|---|
| This season's peak (SWE) | 8.8 in on Mar 8, 2026 |
| Normal peak (1991-2020 median) | 14.9 in |
| Peak vs normal peak | 59% |
| Percent of median at last snow reading | 0% (Jun 11, 2026) |
| Water-year precipitation to date | 24.2 in (85% of median) |
Previous weeks
Week of Aug 26, 2026
The Upper Colorado River Basin's snowpack peaked at 8.8 in of snow water equivalent on Mar 8, 59% of the normal peak of 14.9 in. Water-year precipitation through August 26 totaled 22.8 in, 82% of the 1991-2020 median.
Week of Aug 19, 2026
Upper Colorado River Basin snowpack peaked at 8.8 in of snow water equivalent on Mar 8, 2026, 59% of the normal peak. Water-year precipitation totaled 21.7 in, 82% of the 1991-2020 median. The snow year is complete; the 2027 snow year begins October 1.
An earlier week
Upper Colorado River Basin snowpack peaked at 8.8 in on March 8, 59% of the normal peak of 14.9 in. Snowpack is now gone. Water-year precipitation totaled 21.5 in, 81% of the 1991-2020 median.
About Upper Colorado River Basin snowpack
Snow water equivalent (SWE) is the depth of water held in the snowpack, and it is the single number that best predicts the coming spring and summer runoff. Depth alone can mislead: a deep, dry snowpack can hold less water than a shallow, dense one.
The Waterline reads Upper Colorado River Basin's snowpack from the USDA Natural Resources Conservation Service SNOTEL network using the standard basin-index method. It sums the current water content across the 137 SNOTEL stations inside the Upper Colorado River Basin (hydrologic units 14), divides by the sum of those same stations' 1991-2020 medians for the date, and reports the ratio as percent of median, so a deep high-elevation site counts for more than a shallow valley one and a station with no long-term normal never distorts the number. The inch figures shown here are the average snow water equivalent across those reporting stations.
Snow builds from about October, normally peaks near April 1, and melts out by early summer. Once the normal snowpack for the date nears zero, percent of median stops being a meaningful number, so this page reports the season's peak instead of a percentage until the snow returns.