Weld County Water Intelligence Brief

June 22, 2026 | Free-Tier Edition | Water Division 1 — South Platte Basin

Situation Summary

Weld County's two-river system — the South Platte mainstem and Cache la Poudre — is carrying measurable but falling flows as of June 22, with snowpack in the Poudre headwaters fully melted out 4–6 weeks ahead of the historical median meltout date following the anomalous March 2026 heat event. Supplemental C-BT supply reliability and canal delivery scheduling are now the primary variables governing irrigation adequacy through mid- and late-season for both direct-flow and allotment holders. Reservoir storage data, 7-day forecast details, and Water Division 1 call status context are available in the full brief.

Snowpack Conditions

All three SNOTEL stations monitoring the Cache la Poudre headwaters have reached complete meltout as of June 21, 2026:

Deadman Hill and Hourglass Lake are fully melted out. Joe Wright retains a trace — 0.1" SWE with 2.0" of settled depth — indicating a remnant snow patch rather than meaningful water supply. For this date on the calendar, 0.0" SWE represents normal seasonal condition at these stations; the critical signal for 2026 is not that snowpack is below normal *today*, but that meltout occurred 4–6 weeks earlier than the historical median meltout date. That timing shift means the natural Poudre River runoff pulse has already passed, and flows will continue declining through summer without significant precipitation events. Note that these three stations monitor only the Poudre headwaters — South Platte basin headwaters snowpack feeding Carter Lake and upper mainstem flows is an additional upstream variable not captured here.

Streamflow Conditions

Both river systems are showing falling conditions on June 22, consistent with post-runoff seasonal decline:

Cache la Poudre River:

The 10 cfs reduction between Fort Collins and the Timnath gauge reflects normal conveyance losses and upstream diversions as the Poudre moves through the Fort Collins reach toward Weld County. The Timnath gauge is the closest active indicator to where the Poudre enters Weld County; at 50 cfs and falling, northern Weld County users receiving Poudre-sourced deliveries should monitor canal company communications closely.

South Platte River:

The South Platte at Fort Lupton is carrying more volume than either Poudre gauge reading, reflecting contributions from multiple upstream tributaries and return flows entering the mainstem above this point. However, the falling trend is consistent across all three gauges, indicating the basin-wide runoff season is winding down. Under Water Division 1 priority administration, falling mainstem flows increase the likelihood that calls from senior downstream rights will affect junior direct-flow and well users. Irrigators holding junior priority dates should maintain awareness of any active calls through the Division 1 engineer's office.

Seasonal Guidance

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Data Sources: SNOTEL data through June 21, 2026; USGS streamflow data through June 22, 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.