M-1 Street Flooding Potential

Time: 1226 PM Sat May 22, 2021 Forecaster: Brad Simmons ------------------------- MESSAGE 1 Flash Flood Prediction Program ------------------------- STREET FLOODING POTENTIAL We have determined that street and small stream flooding is possible in the following counties: JEFFERSON, BOULDER (CITY OF BOULDER AFFECTED, FOUR MILE BURN AREA AFFECTED), BROOMFIELD, DOUGLAS, ADAMS, DENVER, ARAPAHOE including: DIA, THE CITY OF AURORA, ARVADA, WHEAT RIDGE, LAKEWOOD ------------------------------------------------------------------------------ from: 100 PM to 800 PM . Prime time for flooding: 200 PM to 700 PM . ------------------------------------------------------------------------------ Forecast rainfall: Strong thunderstorms will have the potential to produce 0.3-0.7" of rain in 10-30 minutes. A slow moving thunderstorm or training of thunderstorm cells may result in up to 1.5" of rain 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: Strong thunderstorms may also contain large hail, gusty winds in excess of 50mph, frequent cloud-to-ground lightning and possibly an isolated tornado. 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]