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| NISQUALLY--ALDER RESERVOIR | |
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| Forecasts are calculated from a forecast time series that approximates flow at a 6 hour time step interval. Observed instantaneous peaks can be higher than model forecast peaks. |
| NISQUALLY--ALDER RESERVOIR (ALRW1) Forecasts for Water Year 2026 Ensemble Date: 2025-12-06 Forecast Period: December 6 to April 1 | |||
| Exceedence Probability | Inflow CFS | Probable Date of Peak | |
| 95 % | 20232 | 2025-12-09 | |
| 90 % | 20232 | 2025-12-09 | |
| 70 % | 20232 | 2025-12-09 | |
| 50 % | 20232 | 2025-12-09 | |
| 30 % | 20232 | 2025-12-09 | |
| 10 % | 27737 | 2026-02-08 | |
| 05 % | 31572 | 2026-02-24 | |
