Monsoon rains boost Utah mountain soils but reservoirs remain critically low

Monsoonal storms this month delivered significant precipitation to Utah's mountains, lifting average soil moisture to 40%, nearly seven points above the July norm and setting the stage for stronger spring runoff if snowpack remains adequate. The U.S. Drought Monitor still classifies the whole state as drought-affected, though the share in extreme or exceptional drought fell modestly to 37%. Reservoirs are on track to close July at 57% of capacity, a decline of 22 percentage points from the previous year and 17 points below the July average, with the median drop from May to July reaching 13%—far above the typical 1% decline.

While a few large reservoirs such as Porcupine remain full, many in central and southern regions, including Gunnison and Piute, are at 10% or less, prompting higher fishing limits and some ramp closures. Governor Spencer Cox declared a state of emergency for Beaver, Piute and Sevier counties after flood damage on recent wildfire scars. Forecasts suggest a 33-50% chance of above-normal precipitation in August, which could further raise soil moisture but also heighten flood risk.