M-1 Low Impact Flooding

Time: 522 PM Sun May 25, 2025 Forecaster: Justin Brooks ------------------------- MESSAGE 1 Flash Flood Prediction Program ------------------------- **** LOW IMPACT FLOODING **** PRIORITY DISSEMINATION RECOMMENDED We have determined that low impact flooding is likely in ARAPAHOE COUNTY including: THE CITY OF AURORA ------------------------------------------------------------------------------ from: Current to 700 PM . Prime time for flooding: Current to 630 PM . ------------------------------------------------------------------------------ Forecast rainfall: Moderate thunderstorms will produce rainfall rates of 0.20"-0.60" total in 10-30 minutes. A strong stationary storm, or training of thunderstorms will have the potential to produce up to an additional 1.20" 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 Arapahoe County and the City of Aurora. Persistent light to moderate showers over Arapahoe County and will continue over the next hour or so. This will result in a continued chance for LOW IMPACT FLOODING, mainly due to 1.00” per hour rainfall rates, rather than any quick heavy rainfall. This will also coincide with the NWS Flood Advisory for Aurora/Arapahoe County effective until 7:00pm. 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]