Monthly Streamflow Volume (1000s of Acre-Feet)
Data Updated: Aug 19 2026 at 7:46 AM PDT |
| Prob | Aug* | Sep | Oct | Nov | Dec | Jan |
| 10% | 45.1 | 27.6 | 180.4 | 262.7 | 672.2 | 900.5 |
| 25% | 44.9 | 18.0 | 42.8 | 107.0 | 269.4 | 483.0 |
| 50% | 44.8 | 16.1 | 18.9 | 57.7 | 123.8 | 240.6 |
| 75% | 44.8 | 14.7 | 14.7 | 25.0 | 50.1 | 92.9 |
| 90% | 44.8 | 14.4 | 12.0 | 18.8 | 27.4 | 63.5 |
|
| Mean | 109.9 | 58.8 | 80.9 | 125.7 | 261.1 | 439.1 |
| %Mean | 40.8 | 27.4 | 23.4 | 45.9 | 47.4 | 54.8 |
| Prob | Feb | Mar | Apr | May | Jun | Jul |
| 10% | 1150.8 | 1547.4 | 1378.2 | 2533.1 | 2464.8 | 1324.4 |
| 25% | 582.4 | 958.4 | 1129.6 | 1803.9 | 1640.0 | 600.4 |
| 50% | 344.5 | 623.7 | 814.6 | 1227.4 | 748.2 | 217.1 |
| 75% | 160.5 | 356.8 | 615.7 | 734.8 | 338.6 | 103.3 |
| 90% | 101.9 | 274.4 | 492.2 | 556.8 | 210.1 | 61.8 |
|
| Mean | 488.0 | 694.3 | 923.4 | 1334.1 | 1012.2 | 392.2 |
| %Mean | 70.6 | 89.8 | 88.2 | 92.0 | 73.9 | 55.4 |
| 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. |
