M-1 Low Impact Flooding

Time: 738 PM Wed July 23, 2025 Forecaster: Aaron O'Brien ------------------------- MESSAGE 1 Flash Flood Prediction Program ------------------------- **** LOW IMPACT FLOODING **** PRIORITY DISSEMINATION RECOMMENDED We have determined that low impact flooding is likely in the following counties: DENVER, ARAPAHOE including: THE CITY OF AURORA ------------------------------------------------------------------------------ from: Current to 900 PM . Prime time for flooding: Current to 830 PM . ------------------------------------------------------------------------------ Forecast rainfall: Typical showers and thunderstorms will produce a 0.10”-0.60” total in 10-30 minutes. A moderate to strong thunderstorm will produce 0.60”-1.20” total in 10-30 minutes. An anchored strong thunderstorm, or training of moderate to strong thunderstorms will have the potential to produce 2.20” in under 60 minutes. ------------------------------------------------------------------------------ The most likely areas to be impacted by flooding are: X Urban streams/gulches; road crossings; recreational trails; adjacent open space areas/campgrounds/parks; floodplain properties; utilities X Urban streets, intersections, low lying areas, known trouble spots ------------------------------------------------------------------------------ Additional Information: Excessive runoff is imminent or already occurring in Denver County, Arapahoe County, and the City of Aurora. Strong thunderstorms may also contain some hail, gusty winds, and frequent cloud-to-ground lightning. This message is not intended for public dissemination. Please pass this information along to affected emergency response organizations (police, fire, public works, etc.) within your area. Also, please take appropriate actions to prepare for possible flooding. Further information will be provided to you as it becomes available. MHFD Flood Prediction Center: 303-458-0789    F2P2 Website [http://udfcd.org/Flash+Flood+Prediction+Program]