Flash Flood — Grand, Colorado

2021-07-30 · near Hot Sulphur Spgs, Grand, Colorado

Event narrative

Heavy rain produced flash flooding along Highway 125, with mud and debris flows crossing the roadway. The highway was closed temporarily to clear off the debris. The U.S. Forest Service reported flooding and some damage on Cabin Creek and Buffalo Creek Roads.

Wider weather episode

Flash flooding occurred on Tonahutu Creek. Trees, mud and debris shut down Grand Lake's hydro plant. Approximately 50 downed trees piled up at the plant's head gate and ash and mud filled the ditch leading to another gate. Another flash flood impacted CO-125. Additional flash flooding occurred in the Calwood and Cameron Peak burn areas, where up to 2.5 inches of rain fell in one hour. In Erie, heavy rain anywhere from 3.5 to 4.5 inches, produced flash flooding. Several vehicles were stranded in intersections and had to be rescued. Severe thunderstorms also produced hail up to quarter size in Larimer County.

View location on OpenStreetMap → (40.2300, -106.1600)

Source: NOAA Storm Events Database, event_id 975312. Narrative written by the NWS forecast office that issued the report.