Aug 23, 2024
With deep monsoonal moisture in place, as well as around 1000 J/kg of instability and some bulk shear aloft, widespread strong to severe thunderstorms formed across the Four Corners region. This resulted in multiple severe threats in eastern Utah which included large hail and flash flooding due to heavy rainfall rates in excess of 2 inches per hour.
Source: NOAA National Weather Service Storm Events Database (event 1208136). 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.