Montrose County Water Intelligence Brief

July 13, 2026 | Colorado River Basin (Upper)

Situation Summary

The Uncompahgre Valley is operating in a post-peak-runoff environment following an anomalous 2026 season in which snowpack across the surrounding ranges melted out 4–6 weeks ahead of the historical median meltout date, compressing the spring runoff window and accelerating the transition to late-season supply conditions. Current streamflows reflect that transition, with the Gunnison system showing moderately stable delivery through the Gunnison Tunnel while the Uncompahgre River displays an atypical mid-July rise. Reservoir storage data for Blue Mesa and Ridgway reservoirs — the two facilities most critical to Uncompahgre Valley supply outlook — are available in the full brief.

Snowpack Conditions

All four SNOTEL stations reporting for Montrose County's surrounding mountain terrain show 0.0" snow water equivalent (SWE) and 0.0" snow depth as of July 12, 2026. The four stations — Columbine Pass, Idarado, McClure Pass, and Park Cone — are fully melted out. Park Cone retains a trace of 1.0" snow depth with 0.0" SWE, indicating wet but non-water-bearing surface conditions only.

No percent-of-median figures are associated with any of these readings because the historical median SWE for mid-July at these elevations is also 0.0" — complete meltout by this point in the calendar is normal. The meaningful signal for 2026 is not today's reading but rather when these stations melted out: approximately 4–6 weeks earlier than the historical median meltout date, driven by the anomalous March heat event. That early meltout is what compressed the runoff window and reduced the total water volume delivered to upstream reservoirs during the critical spring accumulation period. Today's snowpack readings themselves are seasonally normal; the consequence of early meltout is already embedded in upstream storage levels.

Streamflow Conditions

Colorado River near Cameo, CO: Flowing at 1,720 cfs as of July 13, on a falling trend. This mainstem reading reflects combined contributions from the Gunnison and upper Colorado systems and provides broad context for basin-wide supply conditions.

Gunnison River below Gunnison Tunnel, CO (USGS 09128000): Flowing at 467 cfs as of July 13, with flows described as stable. This is the primary operational indicator for Uncompahgre Project delivery — the Gunnison Tunnel diverts Gunnison River water through 5.8 miles of tunnel into the Uncompahgre Valley, and flow at this gauge reflects what is moving through that system. A stable reading at this stage of the season is a meaningful near-term supply signal for UVWUA irrigators. Sustained delivery at this level supports continued irrigation across the project's 76,000+ acres, though the multi-week outlook depends on Blue Mesa Reservoir storage and USBR Aspinall Unit release management.

Uncompahgre River at Colona, CO: Flowing at 109 cfs as of July 13, on a rising trend. A mid-July rise on the Uncompahgre is notable and warrants monitoring — users with direct Uncompahgre River rights, including those served by Ridgway Reservoir releases, should track whether this rise reflects managed releases, localized storm runoff, or other factors. Contact USBR or CDWR Water Division 4 for operational context.

Gunnison River near Grand Junction, CO: No recent flow data available as of July 13.

Plateau Creek near Cameo, CO: No recent flow data available as of July 13.

Seasonal Guidance

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

Data Sources: SNOTEL data through July 12, 2026; USGS streamflow data through July 13, 2026. NRCS SNOTEL network (4 stations), USGS National Water Information System (5 gauges).

Data Current As Of: July 13, 2026. Streamflow and snowpack data sourced from NRCS and USGS automated monitoring networks; 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 (Aspinall Unit — Blue Mesa, Morrow Point, and Crystal reservoirs governing Gunnison Tunnel delivery; and Ridgway Reservoir on the Uncompahgre River), Uncompahgre Valley Water Users Association (UVWUA), and Colorado Division of Water Resources, Water Division 4 (Montrose office) for regulatory decisions and water rights administration.