Flash Flood — Washington, Utah

2025-07-17 · near Pine Vly, Washington, Utah

Event narrative

Emergency manager reported that a campground near Pine Valley Reservoir was flooding with clogged drains and water running down the road. At 4:00 pm MST, adjusted USGS Gauge on the Santa Clara near Pine Valley showed around a 235 cfs flood wave.

Wider weather episode

A weak northern stream shortwave trough moving through the northwest CONUS resulted in the development of high based convection. Some of this convection resulted in strong to severe wind gusts. Additionally, a cutoff low placed off of the southwest CONUS helped advect moisture into southern Utah, leading to convection with periods of sufficiently heavy rain to result in flash flooding over some rain sensitive areas.

View location on OpenStreetMap → (37.3722, -113.5050)

Source: NOAA Storm Events Database, event_id 1270410. Narrative written by the NWS forecast office that issued the report.