Time: 352 PM Fri June 13, 2025 Forecaster: Aaron O'Brien ------------------------- MESSAGE 1 Flash Flood Prediction Program ------------------------- STREET FLOODING POTENTIAL We have determined that street and small stream flooding is possible in the following counties: ARAPAHOE, DENVER, ADAMS, JEFFERSON, BROOMFIELD, DOUGLAS, BOULDER (CITY OF BOULDER AFFECTED) including: WHEAT RIDGE, ARVADA, THE CITY OF AURORA, DIA, LAKEWOOD ------------------------------------------------------------------------------ from: Current to 800 PM . Prime time for flooding: 400 PM to 600 PM . ------------------------------------------------------------------------------ Forecast rainfall: Typical showers and thunderstorms today have the potential to produce between a Trace-0.25" total in 10-30 minutes. A moderate to strong thunderstorm will produce 0.25"-0.75" total in 10-30 minutes. An anchored thunderstorm or training of thunderstorms will have the potential to produce up to 1.25” 60 minutes or less. ------------------------------------------------------------------------------ The most likely areas to be impacted by flooding are: X Mountain streams & floodplains; road crossings; canyon roads & highways; recreational trails; adjacent open space areas/campgrounds/parks; fishing access points & stream reaches; buildings near streams; utilities 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: Strong thunderstorms may also contain hail, gusty winds, and frequent cloud-to-ground lightning. Excessive runoff and flooding of small streams and low-lying areas may occur. 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]