Time: 828 PM Fri July 30, 2021 Forecaster: Brad Simmons ------------------------- MESSAGE 1 Flash Flood Prediction Program ------------------------- LOW IMPACT FLOODING PRIORITY DISSEMINATION RECOMMENDED We have determined that low impact flooding is likely in BOULDER COUNTY (CITY OF BOULDER AFFECTED, FOUR MILE BURN AREA NOT AFFECTED) including: ------------------------------------------------------------------------------ from: Current to 1000 PM . Prime time for flooding: Current to 945 PM . ------------------------------------------------------------------------------ Forecast rainfall: Moderate to strong thunderstorms will have the potential to produce 0.5-1.5" of heavy rain in 10-30 minutes. A nearly stationary strong thunderstorm will have the potential to produce up to 3.0" in 60-90 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 over far SE Boulder County in the Lafayette and Erie areas as a persistent storm continues to produce heavy rainfall over a small area. Strong thunderstorms may also contain large 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]