Snowpack in the southwest San Juan mountains of Colorado could disappear completely within the next one to three days [1].
This rapid depletion threatens regional water security and increases the risk of early wildfires as the state grapples with a historic drought. The timing of the melt is critical for downstream water management and ecosystem health.
Forecasters said the snowpack may hit zero on Saturday [1]. If this occurs, it would represent the third earliest melt date on record [1]. The acceleration of the melt is tied to extremely low snow water equivalent levels across the region.
The crisis is part of a broader statewide trend. Colorado's statewide snowpack is currently at approximately 22% of the long-term median [3]. This significant deficit leaves the state vulnerable to prolonged dry conditions, and reduced streamflow throughout the summer months.
Environmental factors and historic drought conditions have contributed to the current instability of the mountain snowpack. The lack of accumulation during the winter months means there is little reserve to withstand the rising temperatures of late May.
Water managers said they continue to monitor the San Juan mountains as the remaining snow vanishes. The speed of this transition from snow to runoff can impact the ability of reservoirs to capture water effectively before it flows downstream.
“Snowpack in the southwest San Juan mountains of Colorado could disappear completely within the next one to three days.”
The potential for a record-early snowmelt in the San Juan mountains signals a severe hydrological deficit for the region. When snowpack hits zero this early in the season, it eliminates the gradual release of water that typically sustains rivers and agriculture through the summer. Combined with a statewide snowpack that is barely a quarter of the historical average, this increases the likelihood of severe water shortages and heightened wildfire risks across the U.S. West.
