We have determined that low impact flooding is likely in the following counties: Arapahoe, Douglas
including: the City of Aurora
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from: Current to 530 PM.
Prime time for flooding: Current to 500 PM.
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Forecast rainfall: Weak to moderate nearly stationary thunderstorms will have the potential to produce 0.3-0.8" in 10-30 minutes and up to 1.2" in 45-60 minutes. Strong slow moving thunderstorms will have the potential to produce rainfall rates of 0.5-1.5” in 10-30 minutes and up to 2.0” of rain in 45-60 minutes.
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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
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Additional Information: Excessive runoff is imminent or already occurring in Douglas County, Arapahoe County, and the City of Aurora. Strong thunderstorms may also contain hail, gusty winds and 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.