Snowpack

The Natural Resources Conservation Service (NRCS) in Idaho has released the January Water Supply Outlook Report, the first for the 2025 Water Year.

Streamflow, snowpack, and precipitation data for each basin can be accessed on the NRCS Idaho Snow Survey web page.

“The snowpack across Idaho saw impressive gains around the holidays with an atmospheric river event bringing ample moisture to the region. Snowpack improved from 70% to approximately 90% of normal in the Snake River headwaters and Henrys Fork-Teton by January 1,” said Erin Whorton, Water Supply Specialist for NRCS Idaho. “Eastern and southern Idaho experienced 110 to 131% of normal precipitation during December. While the snowpack is looking good, especially compared to this time last year, total water year precipitation remains lower than the snowpack percentages due to the abnormally dry, hot October.” 

January 1 streamflow forecasts reflect the first of month mountain snowpack and total water year precipitation conditions. In January, NRCS only publishes streamflow forecasts at locations where model confidence is high. For the primary forecast period, streamflow forecasts are near to above normal in Panhandle, Clearwater, Southern Snake and Bear River basins. Reflecting January 1 snowpack conditions, below normal streamflow is expected in the Upper Snake River basin during the April through July runoff.

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