We have determined that low impact flooding is likely in the following counties: Jefferson, Broomfield, Adams
including: Arvada
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from: Current to 530 PM.
Prime time for flooding: Current to 430 PM.
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Forecast rainfall: Strong thunderstorms will have the potential to produce rainfall of 0.05-1.00” in 10-30 minutes. A slow-moving thunderstorm or a large thunderstorm complex may result in up to 1.50" of rain in up to 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 Jefferson County, Broomfield County, Adams County, and Arvada. Strong thunderstorms may also contain large 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.