Mesa County Water Intelligence Brief

Colorado River Basin (Upper) | September 14, 2026

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Situation Summary

Colorado River flows near Cameo are running at 979 cfs and falling, with the Uncompahgre River at Colona registering 88 cfs and also declining — conditions that signal tightening late-season supply for Mesa County irrigators heading into the final weeks of the irrigation season. With snowpack across all monitored stations at seasonal zero, there is no remaining melt contribution to sustain streamflows, and operators should plan around current runoff trajectories only. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

All four SNOTEL stations reporting for Mesa County show 0.0" snow water equivalent (SWE) and 0.0" snow depth as of September 13, 2026 — consistent with end-of-season conditions at this point in the calendar. For context, this season's snowpack melted out 4–6 weeks ahead of the historical median meltout date due to an anomalous March heat wave, which compressed the runoff window and accelerated early-season streamflow peaks.

Station readings (09/13/2026):

Park Cone's trace reading of 0.2" SWE with no measurable depth is not operationally significant and should not be interpreted as an active snowpack contribution. No SNOTEL-based melt input to streamflow is expected from any station. The supply picture for the remainder of the irrigation season depends entirely on stored water and current river conditions.

Streamflow Conditions

Colorado River near Cameo (09/14): 979 cfs, falling. This is the primary mainstem indicator for Mesa County's Colorado River supply. A falling trend at this late-season date reflects diminishing upstream contributions and declining baseflow — a pattern typical for September, though the timing and pace of this year's decline reflects the earlier-than-normal melt season.

Uncompahgre River at Colona (09/14): 88 cfs, falling. While this gauge is upstream in Montrose County, Uncompahgre tributary inflows ultimately contribute to the Gunnison River, which affects overall Colorado River mainstem supply at Grand Junction-area diversions. The falling trend here is consistent with broader late-season conditions across the Upper Colorado system.

Gunnison River near Grand Junction: No recent flow data available. The Gunnison is a critical tributary to the Colorado River mainstem at Grand Junction and a primary supply source for Delta and Mesa county agricultural users. The data gap at this gauge limits real-time assessment of Gunnison contributions — operators should contact Colorado Division of Water Resources, Water Division 4 (Montrose office) or monitor the CDWR gauge network directly for updated Gunnison readings.

Plateau Creek near Cameo: No recent flow data available. Plateau Creek serves irrigators in the Collbran and Vega Reservoir drainage area. The absence of current data limits visibility into local tributary conditions — users dependent on Plateau Creek deliveries should contact the Collbran Project or local ditch companies for current delivery status.

Seasonal Guidance

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Data Sources: SNOTEL data through September 13, 2026; USGS streamflow data through September 14, 2026

Data Current As Of: Colorado Division of Water Resources

Important Disclaimers: This brief provides automated analysis for informational purposes only. Specific numerical claims have not been independently verified. Consult official sources including your local water district, U.S. Bureau of Reclamation, Western Colorado Area Office, and Colorado Division of Water Resources for regulatory decisions and water rights administration.