M-1 Low Impact Flooding

Time: 742 AM Tue August 16, 2022 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 the following counties: BOULDER (CITY OF BOULDER AFFECTED, FOUR MILE BURN AREA NOT AFFECTED), BROOMFIELD including: ------------------------------------------------------------------------------ from: Current to 1000 AM . Prime time for flooding: Current to 900 AM . ------------------------------------------------------------------------------ Forecast rainfall: Moderate rain showers will have the potential to produce rainfall rates of 0.4-0.8" in 10-30 minutes and 1.0-1.4" in an hour. Weak thunderstorms will have the potential to produce rainfall rates of 0.4-1.2" in 10-30 minutes and up to 2" in 45-60 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 over portions of Boulder and Broomfield Counties. It may not take as much rain today to produce excessive runoff as the ground is saturated in many areas and smaller creeks and streams are still running high from rain yesterday and overnight. 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]