Monthly Streamflow Volume (1000s of Acre-Feet)
Data Updated: Sep 01 2026 at 8:01 AM PDT |
| Prob | Sep* | Oct | Nov | Dec | Jan | Feb |
| 10% | 4.4 | 9.2 | 13.9 | 29.3 | 27.1 | 28.4 |
| 25% | 4.2 | 8.9 | 10.8 | 22.1 | 21.7 | 22.6 |
| 50% | 4.1 | 8.8 | 9.4 | 13.0 | 15.0 | 13.1 |
| 75% | 4.0 | 8.7 | 9.3 | 10.5 | 10.0 | 9.9 |
| 90% | 3.9 | 8.6 | 9.2 | 10.4 | 8.5 | 8.5 |
|
| Mean | 3.8 | 8.7 | 11.0 | 15.5 | 17.5 | 17.2 |
| %Mean | 107.9 | 101.1 | 85.5 | 83.9 | 85.7 | 76.2 |
| Prob | Mar | Apr | May | Jun | Jul | Aug |
| 10% | 33.1 | 23.3 | 25.3 | 17.8 | 13.3 | 8.5 |
| 25% | 23.4 | 16.0 | 15.0 | 11.6 | 7.3 | 6.1 |
| 50% | 15.6 | 8.8 | 7.2 | 4.3 | 3.4 | 3.2 |
| 75% | 12.4 | 6.1 | 4.2 | 1.6 | 1.8 | 1.8 |
| 90% | 10.0 | 4.4 | 1.8 | 0.2 | 0.9 | 1.5 |
|
| Mean | 17.7 | 10.3 | 8.2 | 5.4 | 2.7 | 2.3 |
| %Mean | 88.1 | 85.4 | 87.8 | 79.6 | 125.9 | 139.1 |
| Note 1: %Mean is the "Median forecast monthly value (50%)" divided by the "monthly mean" (displayed as a %) |
| Note 2: For current month, graphic represents remaining forecast only, text represents observed + remaining forecast. |
