Washington County, UT — Water Intelligence Brief

June 29, 2026 | Free-Tier Edition

Situation Summary

Washington County's Virgin River basin has completed its seasonal snowmelt cycle, with all five SNOTEL monitoring stations reporting zero snow water equivalent as of June 28 — a normal condition for late June, though the 2026 snowpack melted out 4–6 weeks ahead of the historical median meltout date, meaning the basin received its full melt pulse earlier in the season than typical. WCWCD's primary surface water buffers — Quail Creek Reservoir and Sand Hollow Reservoir — are the critical supply variables heading into peak summer municipal demand for the St. George metro area's approximately 190,000 residents. Reservoir storage data, 7-day forecast details, and depletion analysis are available in the full brief.

Snowpack Conditions

All five SNOTEL stations monitoring the Virgin River basin headwaters are reporting zero snow water equivalent and zero snow depth as of June 28, 2026:

These readings reflect normal end-of-season conditions for late June — the median SWE for this date at all five stations is also 0.0", so no below-normal characterization is warranted for today's readings. The operationally significant signal for 2026 is meltout timing: an anomalous March heat wave drove meltout 4–6 weeks ahead of the historical median meltout date across the Virgin River basin headwaters. That early melt pulse has already passed through the system. The snowpack-driven recharge window for 2026 is closed. Washington County water managers should treat the remainder of the summer and fall as a carry-storage and monsoon-supplemented period, with no further snowmelt contribution to Virgin River flows or reservoir inflows anticipated until the 2026–2027 season.

A note on monitoring coverage: SNOTEL network density in southwest Utah's Virgin River basin headwaters is sparser than in northern Utah ranges. Water managers should acknowledge that these five stations, while the best available automated data, do not capture every elevation band and aspect in the watershed with the same resolution available in more heavily instrumented basins.

Streamflow Conditions

Six USGS gauges are reporting across the Virgin River basin as of June 29, 2026:

The Virgin River mainstem is showing stable to slightly rising flows at the La Verkin and Virgin gauges, which may reflect early monsoon moisture or localized runoff rather than snowmelt at this stage of the season. The Santa Clara River — which feeds the Gunlock Reservoir drainage and is a secondary supply tributary — is showing notably low and falling conditions at the St. George gauge (2 cfs), with only modest flow near Pine Valley (5 cfs). For WCWCD operations, Santa Clara River conditions are worth monitoring closely given the low-flow trend at the downstream gauge. Municipal planners should note that late June Virgin River flows in the 50–60 cfs range represent the tail of the spring runoff season; flows will typically taper further through July absent significant monsoon input.

Seasonal Guidance

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Data Sources: SNOTEL data through June 28, 2026; USGS streamflow data through June 29, 2026.

Data Current As Of: June 29, 2026. Utah Division of Water Rights records current as of date of publication.

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 USBR Lower Colorado Region for regulatory decisions and water rights administration. This brief does not constitute legal, engineering, or water rights advice.