We have determined that low impact flooding is likely in Boulder County (City of Boulder affected, Four Mile Burn Area affected)
including:
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from: Current to 900 PM.
Prime time for flooding: Current to 830 PM.
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Forecast rainfall: Strong thunderstorms will produce rainfall rates of 0.80-2.00” in 10-30 minutes. A slower moving strong thunderstorm or training of thunderstorm cells may result in up to 3.50" of rain in 45-75 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
X Mountain locations subject to mud/rock/debris slide
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Additional Information: Excessive runoff is imminent or already occurring in Boulder County. Strong thunderstorms may also contain hail, gusty winds and frequent cloud-toground lightning. Message 2's remain valid until midnight.
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.