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| COWLITZ--MOSSYROCK 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. |
| COWLITZ--MOSSYROCK RESERVOIR (MSRW1) Forecasts for Water Year 2026 Ensemble Date: 2026-05-07 Forecast Period: May 7 to September 1 | |||
| Exceedence Probability | Inflow CFS | Probable Date of Peak | |
| 95 % | 5292 | 2026-05-14 | |
| 90 % | 5292 | 2026-05-14 | |
| 70 % | 5292 | 2026-05-14 | |
| 50 % | 5739 | 2026-05-25 | |
| 30 % | 7209 | 2026-06-02 | |
| 10 % | 11522 | 2026-06-13 | |
| 05 % | 14390 | 2026-06-15 | |
