We have determined that street and small stream flooding is possible in the following counties: Arapahoe, Denver, Adams, Douglas, Jefferson, Broomfield, Boulder (City of Boulder affected, Four Mile Burn Area affected)
including: Wheat Ridge, Arvada, the City of Aurora, DIA, Lakewood from: Current to 800 PM.
Prime time for flooding: Current to 700 PM. Forecast rainfall: Typical weak to moderate thunderstorms will produce 0.1-0.3" of rain. Strong thunderstorms will have the potential to produce 0.3-1.2" in 10-30 minutes. 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

Additional Information: A large, slower moving or stationary strong thunderstorm may produce up to 2.4" of rain in 45-60 minutes Along with frequent lightning, strong winds and large hail.

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.