Aug 19, 2021
An area of low pressure originating from the Pacific Northwest dropped into the Great Basin. As this feature slowly lifted across the region it tapped into a stream of monsoon moisture from the south. The upper level lift paired with the abundance of moisture resulted in widespread showers and thunderstorms. Some storms produced heavy rain which led to localized flooding and debris flows in Grand County.
Source: NOAA National Weather Service Storm Events Database (event 967340). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Grand County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.