| ||||||||||||||||||
| COSUMNES RIVER - MICHIGAN BAR (MHBC1) | ||||||||||||||||||
| Latitude: 38.50º N | Longitude: 121.04º W | Elevation: 168 Feet | ||||||||||||||||
| Location: Sacramento County in CA | ||||||||||||||||||
| River Group: San Joaquin | ||||||||||||||||||
| Issuance Time: | Aug 17 2026 at 7:48 AM PDT |
| Please Note: | Ensemble forecasts produced by CNRFC only consider meteorological uncertainty and do not account for hydrologic uncertainty. Flow data on this product are unregulated / full natural flow. |
| Monthly Probability Plot |
| Monthly Streamflow Volume (1000s of Acre-Feet) Data Updated: Aug 17 2026 at 7:53 AM PDT | ||||||
| Prob | Aug* | Sep | Oct | Nov | Dec | Jan |
| 10% | 2.6 | 2.5 | 6.9 | 19.1 | 110.0 | 159.8 |
| 25% | 2.6 | 2.0 | 3.2 | 8.1 | 27.9 | 54.5 |
| 50% | 2.6 | 1.9 | 2.1 | 3.9 | 10.7 | 22.1 |
| 75% | 2.6 | 1.9 | 2.0 | 2.3 | 4.5 | 10.3 |
| 90% | 2.6 | 1.9 | 1.9 | 2.1 | 2.6 | 5.0 |
| Mean | 1.6 | 1.3 | 2.8 | 8.1 | 33.8 | 61.4 |
| %Mean | 162.5 | 146.2 | 75.0 | 48.1 | 31.7 | 36.0 |
| Prob | Feb | Mar | Apr | May | Jun | Jul |
| 10% | 197.4 | 208.6 | 123.5 | 95.2 | 37.6 | 14.0 |
| 25% | 69.4 | 120.2 | 78.8 | 66.9 | 24.8 | 9.7 |
| 50% | 32.0 | 56.4 | 43.1 | 24.1 | 10.6 | 6.1 |
| 75% | 13.7 | 26.2 | 22.9 | 13.9 | 6.4 | 4.7 |
| 90% | 8.7 | 15.1 | 14.2 | 7.5 | 4.4 | 3.1 |
| Mean | 71.7 | 89.1 | 61.9 | 38.4 | 14.0 | 4.0 |
| %Mean | 44.6 | 63.3 | 69.6 | 62.8 | 75.7 | 152.5 |
| 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. | ||||||
| Location Photographs | ||
| ESRI™ Locator Map |
| Flood Impacts | |
| 13.2 Feet | Water floods houses in Wilton. The south bank levee near Wilton is overtopped. |
| 12.0 Feet | Water flows on to the road near Wilton. |
| 8.0 Feet | Low lying lands along the river begin to flood. |