Monthly Streamflow Volume (1000s of Acre-Feet)
Data Updated: Sep 02 2026 at 7:50 AM PDT |
| Prob | Sep* | Oct | Nov | Dec | Jan | Feb |
| 10% | 1.9 | 7.2 | 26.2 | 56.5 | 51.4 | 59.5 |
| 25% | 1.8 | 2.5 | 11.6 | 28.5 | 37.3 | 43.3 |
| 50% | 1.7 | 1.7 | 5.1 | 11.2 | 21.4 | 24.8 |
| 75% | 1.7 | 1.6 | 1.7 | 5.4 | 10.5 | 12.2 |
| 90% | 1.7 | 1.6 | 1.5 | 3.0 | 5.9 | 10.1 |
|
| Mean | 2.3 | 4.2 | 8.9 | 19.6 | 25.1 | 30.7 |
| %Mean | 73.9 | 40.5 | 57.3 | 57.1 | 85.3 | 80.8 |
| Prob | Mar | Apr | May | Jun | Jul | Aug |
| 10% | 88.4 | 76.9 | 115.6 | 83.3 | 20.8 | 3.5 |
| 25% | 51.2 | 68.7 | 92.7 | 43.1 | 8.0 | 2.6 |
| 50% | 38.5 | 59.0 | 56.0 | 17.8 | 3.6 | 2.2 |
| 75% | 29.1 | 41.8 | 32.3 | 6.6 | 2.6 | 2.0 |
| 90% | 19.5 | 29.1 | 12.1 | 3.2 | 2.1 | 1.7 |
|
| Mean | 43.5 | 53.6 | 60.1 | 28.6 | 7.9 | 3.1 |
| %Mean | 88.5 | 110.1 | 93.2 | 62.2 | 45.6 | 71.0 |
| 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. |
