Where the lake is likely to land between July 26 and December 31. Historical Avg is the typical drop in past years like this one. Current Trend is what happens if this week’s pace keeps up.
Based on 0 past years that started near this elevation on July 26.
In April 2026, the Bureau of Reclamation cut how much water Powell sends downstream and started moving water in from Flaming Gorge. The chart below shows where the lake lands with the plan compared to without it, from today through April 2027.
Through September 30, 2026, releases are cut from 7.48 MAF a year down to 6.0 MAF. Up to 1 MAF of water gets moved from Flaming Gorge into Powell between now and April 2027. The plan commits to keeping Powell at or above 3,500 ft — the “safety line” 10 ft above the point where the dam can’t make power anymore.
How much water flows in and out each day — including this year’s snowmelt (give or take 20%) and evaporation.
With the plan, Powell drops to 3513 ft by April 2027. Without it, the lake would drop to 3462 ft — that’s 61 ft down. The plan saves 51 ft. That’s 13 ft above the plan’s 3500 ft safety line.
Over the next 12 months
Net: -0.12 MAF. At 3523 ft, each foot of canyon holds about 63K acre-feet → that means a -10-ft drop to 3513 ft by April 2027.
The plan saves 51 ft. Without it, Powell drops to 3462 ft (-61 ft). Not a rise — a rescue.
This is just the patch through April 2027. Run the long-term simulator → to see which plan actually holds Powell up past 2026.
The gap between the two lines is what the plan buys.
| Month | Elevation | Change from today (3523 ft) |
|---|---|---|
| Aug 2026 | 3530 ft | +7 ft |
| Sep 2026 | 3532 ft | +9 ft |
| Oct 2026 | 3526 ft | +3 ft |
| Nov 2026 | 3521 ft | -2 ft |
| Dec 2026 | 3517 ft | -6 ft |
| Jan 2027 | 3514 ft | -9 ft |
| Feb 2027 | 3510 ft | -13 ft |
| Mar 2027 | 3510 ft | -13 ft |
| Apr 2027 | 3513 ft | -10 ft |
The 2022 release (~500 KAF under the DROA) ran May 2022 → April 2023. Emergency releases from Flaming Gorge slow Powell's decline; they don't reverse it on their own. The 2022 window had different snowpack and smaller cuts, so this is a historical reference — not a forecast.
Each band is 15 feet tall. Wider bands hold more water. The canyon is V-shaped, so higher elevations hold a lot more water per foot than lower ones.
How this year’s Upper Colorado snowpack compares to past years. This year is the black line.
Statistical shading percentiles are calculated from period of record (POR) data, excluding the current water year. Percentile categories range from: minimum to 10th percentile, 10th-30th, 30th-70th, 70th-90th, and 90th-maximum.
Average snowpack percentage for each major tributary that feeds into Lake Powell