Weld County Agricultural Water Intelligence Brief

October 19, 2026 | Water Division 1 — South Platte Basin

Situation Summary

South Platte flows at Fort Lupton are running at 145 cfs (stable) and Cache la Poudre flows at Fort Collins are 29 cfs (rising), providing functional late-season supply across Weld County's two-river system as irrigation demand winds down for the 2026 season. C-BT allotment holders and canal company members should be assessing end-of-season accounting and augmentation plan obligations under Water Division 1 administration before the transition to winter. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

All three SNOTEL stations monitoring Cache la Poudre headwaters snowpack are at early-season baseline conditions, consistent with normal late-October accumulation patterns — though the 2026 water year opened against a backdrop of snowpack that melted out 4–6 weeks ahead of the historical median meltout date due to an anomalous March heat wave.

Deadman Hill (10/18): SWE 1.0", 90% of the 1.1" median. This is the strongest early-season reading among the three stations and the only one showing a meaningful percent-of-median comparison — at 90%, it is essentially on pace with the historical norm for this date.

Joe Wright (10/18): SWE 0.2", 66% of the 0.3" median. A modest early accumulation, slightly below the median for this date, though the absolute values are small enough that the practical significance is limited at this stage of the accumulation season.

Hourglass Lake (10/18): SWE 0.0", no percent-of-median shown. A 0.0" reading at this date with no percent-of-median indicates the station's historical median for mid-October is also 0.0" — this reflects normal seasonal timing, not an anomalous deficit. No alarm is warranted from this reading alone.

Taken together, Poudre headwaters snowpack is at or near normal early-season conditions. Irrigators and water managers should note that these three stations cover the Cache la Poudre headwaters only — South Platte basin headwaters snowpack (Blue River corridor, upper South Platte canyons feeding the Denver metro area and Carter Lake) is an additional upstream variable not captured by this station network.

Streamflow Conditions

Weld County's two-river system is showing late-season stability with a modest upward signal on the Poudre.

Cache la Poudre River at Fort Collins (10/19): 29 cfs, rising. This upstream gauge reflects conditions entering the Weld County delivery zone from Larimer County and shows a positive directional trend. Rising flows at this point in October are consistent with early-season precipitation and cooling temperatures reducing consumptive demand.

Cache la Poudre River Above Boxelder Creek Near Timnath (10/19): 14 cfs, stable. This gauge is the closest active monitoring point to where the Poudre enters Weld County, and its stable reading downstream of Fort Collins reflects normal late-season diversions and channel losses along the lower Poudre corridor. Northern Weld County canal users drawing from the Poudre system should note the differential between the two gauges.

South Platte River at Fort Lupton (10/19): 145 cfs, stable. The primary mainstem indicator for Weld County shows a healthy late-season flow volume holding steady. At 145 cfs, the mainstem is providing reliable conveyance for any remaining irrigation demand and supporting return flow dynamics that downstream senior rights holders depend on through the end of the season.

Across both river systems, current conditions do not suggest active curtailment pressure for most users. However, Water Division 1 call status can shift rapidly — junior right holders should remain in contact with the Division Engineer's office regardless of current gauge readings.

Seasonal Guidance

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Data Sources: SNOTEL data through October 18, 2026; USGS streamflow data through October 19, 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.