Click the link to read the newsletter on the Aspen Journalism website (Heather Sackett):
June 20, 2025
Dismal spring runoff worse than forecast
Peak river flows have come and gone on the Western Slope, with most rivers seeing below normal peaks and currently running well below last year’s levels. According to Aspen Journalism’s real time local streamflow tracker, streams are flowing at 42-63% of normal in the Roaring Fork Watershed.
Streamflows peaked on June 3 or June 4 with the Roaring Fork River flowing as much as 3,050 cfs at Glenwood Springs, which was 87% of average peak flow, and the Colorado River running up to 11,400 cfs near the stateline the next day, which was 64% of normal.As of June 18, the Colorado River is running at about 4,370 cfs at Glenwood Springs, or 43% of average, down from 5,640 cfs last week and from last year’s 13,000 cfs, while the Colorado flowed at 5,360 cfs near the Colorado-Utah stateline, or 33% of average.For more river data, check out Aspen Journalism’s streamflow tracker.According to the National Resources Conservation Service’s June 1 Water Supply Outlook report, statewide snowmelt was tracking about 10 days earlier than average and the streamflow forecasts for all Western Slope basins were below average and down from the April forecasts.
The low streamflows are sure to affect reservoir levels. According to a June 11 update from Tim Miller, a hydrologist with the Bureau of Reclamation, Ruedi Reservoir on the Fryingpan River is no longer forecast to fill. The seasonal inflow forecast for June is 66% of average, a 34,000-acre-foot drop from the April forecast. Miller said the plan is to keep releases to a minimum until the third week in July when the Cameo call is expected to come on. The Aspen Yacht Club boat ramp should be useable through the end of August.
According to the June forecasts from Reclamation, spring runoff into Lake Powell is forecast to be 45% of average, down from April’s forecast of 67%. Lake Powell is currently about 33% full.
