Mesa County Water Intelligence Brief

Colorado River Basin (Upper) | September 7, 2026

Situation Summary

Colorado River flows at Cameo are running at 840 cfs and falling, signaling continued late-season tightening across the upper basin as irrigation demand persists into early September. Uncompahgre River flows at Colona show a similar declining trend at 108 cfs, reflecting basin-wide conditions relevant to Mesa County supply. Irrigators should expect continued flow reductions through the remainder of the season as natural runoff contribution diminishes; 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 snowpack at its normal seasonal baseline for early September — this is expected calendar-appropriate behavior, not an anomalous deficit.

| Station | SWE | Snow Depth |

|---|---|---|

| Idarado | 0.1" | 0.0" |

| Mc Clure Pass | 0.0" | 0.0" |

| Mesa Lakes | 0.1" | 0.0" |

| Park Cone | 0.1" | 0.0" |

No percent-of-median figures are shown for these stations, which reflects the fact that the historical median SWE for this date is also at or near zero — stations are at a normal seasonal condition for early September, not below normal relative to this calendar date. The season's critical water supply story occurred earlier: an anomalous March heat wave drove meltout across these stations 4–6 weeks ahead of the historical median meltout date, pulling the spring runoff pulse forward and reducing total summer delivery potential. That early meltout is background context for the current late-season supply trajectory.

Streamflow Conditions

Colorado River near Cameo, CO — 840 cfs (falling)

The mainstem Colorado at Cameo is the primary supply indicator for Mesa County irrigators. At 840 cfs and declining, flows are in the expected late-season range but the falling trend warrants close monitoring. Continued decreases through September are typical as direct-flow irrigation demand eases but natural runoff contribution is minimal at this point in the season.

Uncompahgre River at Colona, CO — 108 cfs (falling)

The Uncompahgre at Colona reflects tributary basin conditions upstream of its confluence with the Gunnison and ultimately the Colorado. At 108 cfs and falling, this gauge signals tightening conditions in a key contributing sub-basin. Users with water rights tied to Uncompahgre-sourced deliveries should monitor this trend closely.

Gunnison River near Grand Junction, CO — No recent data

No current flow data is available for this gauge. The Gunnison is a major Colorado River tributary and significant supply contributor for the lower basin. The data gap limits real-time situational awareness at this confluence point; users should contact USGS or the Colorado Division of Water Resources for current status.

Plateau Creek near Cameo, CO — No recent data

No current flow data is available for this gauge. Plateau Creek feeds into the Colorado River in the Cameo area and is relevant to local eastern Mesa County irrigation users. Contact USGS or local water managers for current conditions.

Seasonal Guidance

Subscribe for the full brief including reservoir storage, weather forecasts, depletion analysis, and detailed operational recommendations.

Data Sources: SNOTEL data through September 6, 2026; USGS streamflow data through September 7, 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.