Flash Flood — Grand, Utah

2024-08-23 · near Moab, Grand, Utah

Event narrative

Heavy rain due to thunderstorms over the area resulted in 1.5 to 2 inch per hour rainfall rates with pea size hail mixed in. This resulted in flooding across downtown Moab with 2 feet of water flowing through downtown. Mill Creek saw a rise in water levels which runs through town with water cresting the roadway bridge. Water was also seen running over some driveways.

Wider weather episode

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.

View location on OpenStreetMap → (38.5798, -109.5664)

Source: NOAA Storm Events Database, event_id 1208136. Narrative written by the NWS forecast office that issued the report.