Monthly Streamflow Volume (1000s of Acre-Feet)
Data Updated: Aug 20 2026 at 7:31 AM PDT |
| Prob | Aug* | Sep | Oct | Nov | Dec | Jan |
| 10% | 409.3 | 376.6 | 747.4 | 1511.6 | 5009.3 | 5964.1 |
| 25% | 407.6 | 330.2 | 401.7 | 1053.3 | 2798.7 | 3042.6 |
| 50% | 406.9 | 316.6 | 338.5 | 486.0 | 1162.2 | 1990.2 |
| 75% | 406.7 | 308.4 | 314.5 | 372.6 | 597.9 | 837.8 |
| 90% | 406.6 | 306.7 | 297.7 | 321.1 | 397.9 | 671.6 |
|
| Mean | 479.4 | 432.6 | 549.6 | 905.8 | 1988.3 | 2636.9 |
| %Mean | 84.9 | 73.2 | 61.6 | 53.7 | 58.5 | 75.5 |
| Prob | Feb | Mar | Apr | May | Jun | Jul |
| 10% | 6291.8 | 6671.7 | 5389.4 | 6561.4 | 5149.3 | 2609.0 |
| 25% | 3751.0 | 4960.3 | 4175.0 | 5056.4 | 3221.5 | 1332.5 |
| 50% | 2175.6 | 2983.9 | 2878.7 | 2800.7 | 1473.2 | 664.3 |
| 75% | 1079.6 | 2001.6 | 2012.9 | 1933.6 | 887.9 | 437.9 |
| 90% | 787.1 | 1388.8 | 1703.9 | 1303.7 | 634.1 | 365.6 |
|
| Mean | 3028.7 | 3655.6 | 3281.1 | 3324.7 | 2116.0 | 910.6 |
| %Mean | 71.8 | 81.6 | 87.7 | 84.2 | 69.6 | 73.0 |
| 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. |
