Severe · Flash Flood WarningActive alert
Flash Flood Warning issued September 22 at 7:33PM MDT until September 22
Affecting Western Arapahoe, CO; Douglas, CO
In effect until: Sep 23, 2026, 4:30 AM
Western Arapahoe, CO; Douglas, CO
Likely impact across 2 counties in CO; effects through 4:30 AM.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Excessive runoff from this storm will cause flash flooding of small creeks and streams, highways, streets, underpasses, drainage areas and other low lying spots.
Read the original bulletin (official text)
FFWBOU The National Weather Service in Denver has issued a * Flash Flood Warning for... Western Arapahoe County in northeastern Colorado... Northeastern Douglas County in northeastern Colorado... * Until 1030 PM MDT. * At 733 PM MDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 2 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Flash flooding of small creeks and streams, gulches, roads, and poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Eastern Centennial, eastern Highlands Ranch, northern Castle Rock, Parker, Greenwood Village, Lone Tree, Castle Pines, The Pinery, Foxfield and Cherry Creek Reservoir.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™