Flash Flood in Boulder County, Colorado
Flash Flood June 27, 2021 · Boulder County, Colorado
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Heavy rain produced flash flooding in Geer Canyon in the Calwood burn area.
The wider storm
A thunderstorm produced heavy rain and flash flooding in the Calwood burn area. Law enforcement reported a 3 to 4 foot surge of debris and water flowing down Geer Canyon.
The debris flow impacted stretches of Geer Canyon Drive and the lower part of Geer Canyon.
Began near Jamestown (40.1400, -105.3100).
Source: NOAA Storm Events Database, event 968539. Narratives are written by the National Weather Service forecast office that issued the report.
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