McNary Dam & Lake Wallula
April 2026
| Day of Month | Total Generation MWh | Average Generation MW | Station Use MWh | Inflow kcfs | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | Midnight Reservoir Elevation | Average Forebay Elevation | Average Tailwater Elevation | Average Head feet |
|---|
| 1 | | | | 225.10 | 224.10 | 186.80 | 34.60 | 339.40 | 339.25 | 268.56 | 70.69 |
| 2 | | | | | | | | | | | |
| 3 | | | | | | | | | | | |
| 4 | | | | | | | | | | | |
| 5 | | | | | | | | | | | |
| 6 | | | | | | | | | | | |
| 7 | | | | | | | | | | | |
| 8 | | | | | | | | | | | |
| 9 | | | | | | | | | | | |
| 10 | | | | | | | | | | | |
| 11 | | | | | | | | | | | |
| 12 | | | | | | | | | | | |
| 13 | | | | | | | | | | | |
| 14 | | | | | | | | | | | |
| 15 | | | | | | | | | | | |
| 16 | | | | | | | | | | | |
| 17 | | | | | | | | | | | |
| 18 | | | | | | | | | | | |
| 19 | | | | | | | | | | | |
| 20 | | | | | | | | | | | |
| 21 | | | | | | | | | | | |
| 22 | | | | | | | | | | | |
| 23 | | | | | | | | | | | |
| 24 | | | | | | | | | | | |
| 25 | | | | | | | | | | | |
| 26 | | | | | | | | | | | |
| 27 | | | | | | | | | | | |
| 28 | | | | | | | | | | | |
| 29 | | | | | | | | | | | |
| 30 | | | | | | | | | | | |
|
| TOT | | | | | | | | | | | |
| AVG | | | | 225.10 | 224.10 | 186.80 | 34.60 | 339.40 | 339.25 | 268.56 | 70.69 |
|
| MAX | | | | 225.10 | 224.10 | 186.80 | 34.60 | 339.40 | 339.25 | 268.56 | 70.69 |
| MIN | | | | 225.10 | 224.10 | 186.80 | 34.60 | 339.40 | 339.25 | 268.56 | 70.69 |