The main message: Spring of 2018 brought the highest runoff event in 7 years to the upper Henry’s Fork watershed! Our network of water quality monitors showed that these flows were strong enough to provide
May 2018 saw warm temperatures, heavy rain, and above-average snowmelt. Only 30% of this year’s peak snow-water-equivalent (SWE) remains, compared with an average of 43% remaining on June 1. Water-year precipitation stands at 108% of
May 22-24 precipitation totals were over 1 inch at most locations; water-year precipitation jumped from 105% of average to 109%. Snowmelt continues at average rates, and SWE remains at 102% of average. Watershed-total natural flow
In 2005, when I was a professor at Idaho State University, the Henry's Fork Foundation Board of Directors asked me to present an overview of hydrology and water management in the upper Snake River basin.