Weld County Water Intelligence Brief

August 10, 2026 | Free-Tier Edition

Situation Summary

Weld County's two-river system — the South Platte mainstem and Cache la Poudre — is running at low late-season flows consistent with an extremely early-melt year in which Poudre headwaters snowpack melted out 4–6 weeks ahead of the historical median meltout date, leaving no supplemental snowmelt buffer entering August. C-BT allotment holders and direct-flow junior right holders on both rivers should treat current conditions as a high-curtailment-risk environment for the remainder of the irrigation season. Reservoir storage data, C-BT delivery status, and 7-day forecast details are available in the full brief.

Snowpack Conditions

All three SNOTEL stations monitoring the Cache la Poudre headwaters — the snowpack source zone for northern Weld County's primary river system — are reporting fully melted-out conditions as of August 9, 2026.

Zero SWE at this point in August is the normal seasonal condition for these stations — no percent-of-median figure is shown because the historical median SWE for this date is also 0.0". The meaningful signal for 2026 is not today's reading but meltout timing: these stations melted out 4–6 weeks ahead of the historical median meltout date, driven by the anomalous March heat wave that accelerated runoff well into spring rather than extending into the typical May–June peak delivery window. The practical consequence is that Poudre River flows have been declining since early summer with no remaining snowmelt contribution to slow the drawdown. Note that South Platte basin headwaters snowpack — generated in the Blue River corridor and upper Platte drainages feeding Carter Lake and the metro reach — is an additional upstream variable not captured by these three Poudre-focused stations.

Streamflow Conditions

Both river systems serving Weld County are registering low flows on a falling trend as of August 10, 2026.

Cache la Poudre River:

The Timnath gauge is the closest active monitoring point to where the Poudre enters Weld County. At 2 cfs and falling, deliveries from the Poudre to northern Weld County canal systems are extremely limited. The Fort Collins reading of 3 cfs upstream confirms the trend is consistent through the lower Larimer County reach. Junior direct-flow right holders on the Poudre face a high likelihood of active curtailment under Water Division 1 priority administration.

South Platte River:

The Fort Lupton gauge on the South Platte mainstem shows considerably more flow than the Poudre — 59 cfs — but the falling trend warrants close attention as peak agricultural demand for sugar beets, field corn, and other irrigated crops continues through August. Return flows from upstream irrigation operations contribute to mainstem supply, and any reduction in upstream diversion activity can affect the flow available to downstream senior right holders — a characteristic dynamic of the South Platte system's return-flow dependency. Junior right holders on the South Platte mainstem should actively monitor call status with Water Division 1.

Seasonal Guidance

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Data Sources: SNOTEL data through August 9, 2026; USGS streamflow data through August 10, 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, 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.