Weber County Water Intelligence Brief

September 21, 2026 | Free-Tier Edition

Situation Summary

Ogden River releases below Pineview Reservoir are running at 11 cfs and falling, signaling that late-season delivery volumes to Ogden Valley irrigators are tightening as irrigation demand begins to ease into autumn. The Weber River mainstem at Ogden reads 113 cfs (rising) while the Gateway gauge shows 134 cfs (falling), reflecting the complex interplay of upstream releases and in-valley diversions that defines end-of-season basin management. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Both SNOTEL stations monitoring the Weber County watershed have reached their expected seasonal condition for late September, with negligible snow-water equivalent recorded.

Ben Lomond Peak (09/20): SWE 0.2 inches, snow depth 0.0 inches.

Ben Lomond Trail (09/20): SWE 0.3 inches, snow depth 1.0 inch.

No percent-of-median figures are shown for either station, which is appropriate — the historical median SWE for this date is also effectively 0.0 inches, meaning both stations are at normal seasonal condition for late September. The accurate concern for the 2026 water year is not today's snowpack reading but meltout timing: Ben Lomond Peak was reported among the most stressed basins in Utah at peak SWE this water year, running well below normal, and both stations melted out approximately 4–6 weeks ahead of the historical median meltout date. That early meltout is the defining upstream supply event of 2026 — it compressed the runoff season, accelerated reservoir fill timing, and reduced late-season carryover storage across the Weber-Ogden basin.

Streamflow Conditions

Three active USGS gauges provide the current picture for Weber County water users.

Ogden River Below Pineview Reservoir (10140100): 11 cfs, falling (09/21). This is the critical gauge for Ogden Valley agricultural users — it captures Pineview Reservoir releases flowing to Huntsville, Eden, and Liberty area dairy operations, hay fields, and livestock farms. At 11 cfs and falling, late-season delivery volumes are limited. Operators should not assume current delivery rates will hold through the remainder of the irrigation season without confirmation from the Ogden River Water Users Association.

Weber River at Gateway (10133800): 134 cfs, falling (09/21). The Gateway gauge captures Weber River mainstem flow in the upper corridor, upstream of Ogden. The falling trend reflects waning runoff contributions from the upper basin as the season closes.

Weber River at Ogden (10137000): 113 cfs, rising (09/21). The Ogden gauge is the basin integrator — it aggregates total Weber system flow after upstream diversions and reservoir releases reach the valley floor. The modest rising trend at Ogden contrasts with the falling trend at Gateway, suggesting localized tributary contributions or shifting diversion patterns in the mid-basin reach. Weber Basin Water Conservancy District manages the full upstream reservoir system — Echo, Rockport, Lost Creek, and East Canyon reservoirs — and their operational decisions drive the trajectory of this gauge through the end of the season.

As environmental context: the Weber River is a significant direct inflow to Great Salt Lake, and late-season flow volumes in Weber County have measurable downstream implications for GSL elevation.

Seasonal Guidance

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Data Sources: SNOTEL data through September 20, 2026; USGS streamflow data through September 21, 2026

Data Current As Of: September 21, 2026

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, Weber Basin Water Conservancy District (primary water authority managing Pineview, Echo, Rockport, Lost Creek, and East Canyon reservoirs), U.S. Bureau of Reclamation (Upper Colorado Region, Pineview Reservoir operations), Ogden River Water Users Association, and Utah Division of Water Rights for regulatory decisions and water rights administration.