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News Release

Widespread mountain snowmelt occurring in Idaho

Ron Abramovich, Water Supply Specialist, 208.378.5741

BOISE, ID, May 3, 2018 – The Natural Resources Conservation Service has released the fifth water supply outlook report for the 2018 water year.

Precipitation since the water year started on October 1, 2017, varies across the state with watersheds ranging from 80 to 125% of normal.

Current May 1 snowpacks reflect this winter’s precipitation pattern with amounts increasing from south to north and west to east as you move towards the Montana border and the Continental Divide. Snowpacks range from nearly melted out in the Owyhee basin to 140% in the Clearwater and Panhandle Region.

“Spring is here and the rivers are rising,” said Ron Abramovich, Water Supply Specialist for the Idaho Natural Resources Conservation Service. “Some rivers have peaked in southern Idaho while others are several weeks away from seeing their snowmelt streamflow peak. In addition, streams along the Montana border will benefit from the abundant and record high snow that fell in Montana and see an extended high water season.”

Streamflow volume forecasts mirror Idaho’s snowpack with volume forecasts ranging from 35% to 70% of average across Idaho’s southern basins to 135% to 145% in the Selway River, northern Idaho and a few Snake River tributaries in Wyoming.

Especially good news for water users is that despite the below average snowpack and precipitation in some basins Idaho’s reservoirs are in great shape. This combination will provide most users across the state with an adequate water supply.

For information on specific basins, streams, and reservoirs, please view the full report online at May Water Supply Outlook Report.   


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