Washington County, UT — Water Intelligence Brief

October 19, 2026 | Free-Tier Edition

Situation Summary

Virgin River system flows are declining across all monitored gauges this week, with the Virgin River at Virgin recording 111 cfs and the Santa Clara River at St. George registering just 4 cfs — both trending downward as the region transitions into the late-season low-flow period. For WCWCD and municipal planners, this trajectory signals the system is entering its annual minimum-flow window, with Quail Creek and Sand Hollow reservoirs serving as the primary surface water buffer for the St. George metro area's ~190,000 residents. Reservoir storage data and 7-day forecast details are available in the full brief.

Snowpack Conditions

Southwest Utah's SNOTEL network — already sparse relative to northern Utah — shows no meaningful snowpack accumulation across any monitored station as of October 18, 2026. All five stations are reporting conditions consistent with normal early-to-mid October conditions for this elevation band: Gardner Peak (0.6" SWE, 0.0" depth), Gutz Peak (0.0" SWE), Kolob (0.1" SWE), Long Valley Junction (0.0" SWE), and Webster Flat (0.0" SWE). No percent-of-median figures are shown for any station, indicating that the median SWE for this date is also effectively 0.0" — these stations are at their normal seasonal baseline, not below normal.

The critical snowpack story for water year 2026 is not current conditions but meltout timing: Virgin River basin snowpack melted out approximately 4–6 weeks ahead of the historical median meltout date, driven by an anomalous March heat wave. This early meltout compressed spring runoff timing and reduced cumulative seasonal delivery to surface storage. With the new accumulation season not yet underway, monitoring these stations through November and December will be essential for WCWCD supply planning into 2027.

Streamflow Conditions

All six USGS gauges in the Virgin River basin are reporting falling conditions as of October 19, consistent with seasonal recession. Key readings:

The system-wide falling trend is expected for this point in the water year. Hurricane Valley alfalfa operations and Enterprise-area dairy and cattle users should note that late-season flows on the Santa Clara and Virgin system are now at their annual minimum range — plan field operations and livestock water accordingly.

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: October 19, 2026 | Compiled using Utah Division of Water Rights administrative context

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, Washington County Water Conservancy District (WCWCD — primary water authority for Quail Creek and Sand Hollow reservoirs), Utah Division of Water Rights, and Utah Division of Water Resources for regulatory decisions and water rights administration. The Lake Powell Pipeline remains a significant long-term water policy consideration for Washington County supply planning; consult WCWCD for current project status. This brief does not constitute legal, engineering, or water rights advice.