Weld County Agricultural Water Intelligence Brief

Water Division 1 | South Platte Basin | October 5, 2026

*Free-Tier Brief*

Situation Summary

Streamflow on both the Cache la Poudre and South Platte systems is low and falling, with the Poudre gauging 5 cfs at both Fort Collins and above Boxelder Creek near Timnath, and the South Platte at Fort Lupton running 145 cfs on a declining trend — conditions that signal reduced delivery reliability for junior direct-flow right holders as the irrigation season closes. C-BT allotment holders and canal company members should monitor Northern Water communications closely for end-of-season delivery scheduling and any shifts in augmentation plan obligations under Water Division 1 administration. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

All three SNOTEL stations monitoring the Cache la Poudre headwaters show seasonal conditions consistent with post-meltout timing:

No percent-of-median figures are reported for these stations on this date, indicating that the historical median SWE for early October is also near 0.0" — these readings reflect normal seasonal conditions for this point in the calendar, not an anomalous deficit. Context: in 2026, these stations melted out 4–6 weeks ahead of the historical median meltout date, driven by an anomalous March heat wave — a factor that shaped the trajectory of the entire irrigation season upstream. South Platte basin headwaters snowpack (Blue River corridor and upper Platte drainages supplying the Denver metro area and Carter Lake system) is not directly captured by these three Poudre-headwaters stations.

Streamflow Conditions

Cache la Poudre River: Both active Poudre gauges report 5 cfs on falling trends.

The Timnath gauge is the closest active measurement point to the Poudre's entry into Weld County. At 5 cfs and declining, Poudre deliveries to northern Weld County canal users are severely constrained. Senior Poudre rights dating to the 1860s–1870s hold first priority, and any active call from downstream senior holders places junior right holders at immediate curtailment risk.

South Platte River: The Fort Lupton gauge reads 145 cfs on a falling trend. While higher in absolute terms than the Poudre, the South Platte mainstem is also declining late in the season. Junior direct-flow right holders on the South Platte corridor should assess whether current flows satisfy their priority positions under Water Division 1 administration. Return flow dynamics remain a background complexity: senior downstream rights on the lower South Platte depend in part on return flows from upstream irrigation, and reduced late-season diversions can affect that balance.

Seasonal Guidance

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Data Sources: SNOTEL data through October 4, 2026; USGS streamflow data through October 5, 2026

Data Current As Of: October 5, 2026 | 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, Northern Colorado Water Conservancy District (Northern Water — administers C-BT Project; Horsetooth Reservoir data via Northern Water portal at northernwater.org or USBR HydroMet site HRT), U.S. Bureau of Reclamation Eastern Colorado Area Office (Loveland, CO), and Colorado Division of Water Resources Water Division 1 (Greeley office) for regulatory decisions and water rights administration.