Basins
Below normalGreen-Colorado basin
Reservoir storage across Utah / Wyoming
Data through Aug 25, 2026 · source last checked Aug 27, 2026 · page revised Aug 27, 2026
Cite
- Flaming Gorge Reservoir
- Fontenelle Reservoir
About this data
- Source
- US Bureau of Reclamation RISE; California reservoirs via CA DWR CDEC
- Series
- Reservoir storage summed across the basin
- Geography
- Green-Colorado basin
- Unit
- acre-feet
- Calculation
- Daily reading
- Last observation
- Aug 25, 2026
- Update frequency
- Daily
Now 2.89M af, 13% below the 5-yr median.
Green-Colorado basin storage fell to 2.89M af, down 0.9% on the week and 2.6% over the month. The basin sits 13% below the 5-year median.
| Period | Current | Prior | Change |
|---|---|---|---|
| Week over week | 2.89M af | 2.91M af | -0.9% |
| Month over month | 2.89M af | 2.96M af | -2.6% |
| Year over year | 2.89M af | 3.33M af | -13.4% |
| vs 5-yr median | 2.89M af | 3.33M af | -13.4% |
Previous weeks
Week of Aug 19, 2026
Green-Colorado basin storage stands at 2.91M af, down 13.2% from a year ago and 13% below the 5-year median. Month-over-month the basin fell 2.1%.
An earlier week
Green-Colorado basin storage stood at 2.93M af, down 13.1% from last year and 13% below the 5-year median. Week-over-week the basin edged down 0.6%, with a 1.9% decline over the month.
Week of Aug 13, 2026
Green-Colorado basin storage stands at 2.93M af, 13% below the 5-year median. The basin dropped 0.6% on the week and has fallen 13.2% year over year.