The new water year started Oct. 1, and water supplies are already well above normal thanks to carryover from last year’s phenomenal snowpack.
National Weather Service statistics show southern Idaho and eastern Oregon rain and snowfall running slightly ahead of normal through the first three weeks of October. More importantly, the amount of water already in Snake River Basin reservoirs is much higher throughout the system than it was at the beginning of last winter.
According to the U.S. Bureau of Reclamation:*
- Upper Snake reservoirs are 73 percent full, which is 186 percent of the average for this date.
- Boise Basin reservoirs (Anderson Ranch, Arrowrock, Lucky Peak, Lake Lowell) are 57 percent full, or 144 percent of average.
- Payette Basin reservoirs are 69 percent full, 117 percent of average.
*Data as of Oct. 23; source: usbr.gov/pn/hydromet/select.html