Washington County, UT — Water Intelligence Brief

August 24, 2026 | Free-Tier Edition

*Primary Audience: Municipal Water Managers, Planners & Policy Stakeholders | Secondary: Agricultural Users*

Situation Summary

Washington County's water supply picture heading into late August 2026 reflects the consequences of an anomalous early-melt season: snowpack across the Virgin River basin headwaters melted out 4–6 weeks ahead of the historical median meltout date, compressing the spring recharge window and accelerating the transition to late-summer low-flow conditions now observed across all monitored gauges. WCWCD's in-county surface storage — Quail Creek and Sand Hollow reservoirs — and the Navajo Sandstone aquifer remain the primary supply buffers for a metro area of approximately 190,000 residents and growing. Reservoir storage data, 7-day forecast details, and depletion trajectory 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 August 23, 2026 — consistent with fully melted-out, mid-to-late summer conditions. This is the expected seasonal baseline for this date; the 0.0" readings do not indicate below-normal conditions *today*, as the historical median SWE for late August at these elevations is also effectively zero.

| Station | SWE | Depth |

|---|---|---|

| Gardner Peak | N/A | 0.0" |

| Gutz Peak | 0.0" | 0.0" |

| Kolob | 0.0" | N/A |

| Long Valley Jct | 0.0" | 0.0" |

| Webster Flat | 0.0" | N/A |

The operationally significant signal for 2026 is meltout timing, not current readings. These stations melted out 4–6 weeks ahead of the historical median meltout date — meaning the seasonal pulse of snowmelt-driven recharge to Virgin River tributaries and the Navajo Sandstone aquifer arrived and concluded earlier than normal. Southwest Utah has sparser high-elevation SNOTEL coverage than northern Utah counties; this network represents the available monitoring, but headwater basin coverage has inherent limitations that water managers should factor into supply planning.

Streamflow Conditions

Virgin River mainstem and tributary flows are universally in falling or low-flow conditions as of August 24, 2026, consistent with late-season recession following early meltout.

Virgin River Basin — Current Readings:

The mainstem Virgin River is carrying 62 cfs at Virgin, declining downstream to 37 cfs above La Verkin Creek — a pattern reflecting normal late-summer tributary attrition and consumptive use. The East and North Fork readings (35 and 30 cfs respectively, both falling) indicate continued recession in the upper watershed. The Santa Clara River at St. George shows a slight uptick to 5 cfs rising, while the Pine Valley headwater gauge reads 4 cfs falling — the St. George rise may reflect localized monsoon pulse activity and warrants monitoring. At these late-season flow levels, direct Virgin River diversion capacity is limited; WCWCD's off-channel Sand Hollow storage strategy and Quail Creek reservoir operations are the operative supply mechanisms for the metro area.

Seasonal Guidance

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Data Sources: SNOTEL data through August 23, 2026; USGS streamflow data through August 24, 2026

Data Current As Of: August 24, 2026 | Supplemental administrative context: Utah Division of Water Rights

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