Aug 18, 2021
Deep monsoon moisture over Arizona and an approaching trough of low pressure from the Pacific Northwest helped produce local flash flooding and large hail. Thunderstorms reformed during the evening over Yavapai County which continued flash flooding in smaller streams and rapid rises on The Verde River (a main stem river).
Source: NOAA National Weather Service Storm Events Database (event 983550). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Coconino County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.