Monthly Streamflow Volume (1000s of Acre-Feet)
Data Updated: Sep 01 2026 at 8:20 AM PDT |
| Prob | Sep* | Oct | Nov | Dec | Jan | Feb |
| 10% | -20.0 | -3.8 | 26.2 | 104.4 | 71.5 | 77.5 |
| 25% | -35.6 | -27.4 | 1.7 | 47.5 | 37.8 | 57.9 |
| 50% | -41.9 | -41.5 | -21.9 | -0.6 | 4.0 | 20.9 |
| 75% | -45.4 | -48.4 | -31.7 | -22.5 | -15.9 | 2.0 |
| 90% | -46.0 | -53.0 | -41.4 | -33.5 | -23.4 | -9.7 |
|
| Mean | -44.5 | -28.9 | 0.4 | 29.1 | 37.1 | 43.7 |
| %Mean | 94.2 | 143.6 | -5475.0 | -2.1 | 10.8 | 47.8 |
| Prob | Mar | Apr | May | Jun | Jul | Aug |
| 10% | 98.9 | 90.4 | 144.5 | 135.7 | 42.2 | -12.7 |
| 25% | 77.7 | 60.2 | 94.1 | 81.8 | 8.4 | -22.5 |
| 50% | 30.3 | 32.5 | 62.6 | 15.0 | -11.4 | -30.2 |
| 75% | 12.7 | 20.2 | 26.7 | -3.6 | -15.7 | -35.3 |
| 90% | 1.5 | 9.1 | 9.2 | -9.4 | -20.8 | -37.2 |
|
| Mean | 43.2 | 43.5 | 66.2 | 34.1 | -14.4 | -43.0 |
| %Mean | 70.1 | 74.7 | 94.6 | 44.0 | 79.2 | 70.2 |
| 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. |
