Flash Flood — Moffat, Colorado

2024-07-16 · near Greystone, Moffat, Colorado

Event narrative

Heavy rainfall rates of 0.5 to 1 inch in less than an hour from a strong thunderstorm resulted in flash flooding in Hells Canyon through Dinosaur National Monument. An additional inch accumulation of pea sized hail also accompanied the heavy rain resulting in the flash flooding.

Wider weather episode

High pressure began to retrograde to the west towards Arizona with drier air moving in from the north, keeping the subtropical moisture in place for areas south of Interstate 70. Enough moisture remained in addition to a shortwave moving through the flow to allow for a few strong storms still capable of moderate to heavy rainfall rates, that produced some localized flash flooding and mudslides in areas of steep terrain.

View location on OpenStreetMap → (40.4945, -108.8633)

Source: NOAA Storm Events Database, event_id 1204524. Narrative written by the NWS forecast office that issued the report.