We have determined that street and small stream flooding is possible in the following counties: Boulder (City of Boulder affected), Jefferson, Broomfield, Douglas, Adams, Denver, Arapahoe
including: DIA, the City of Aurora, Arvada, Wheat Ridge, Lakewood from: Current to 900 PM.
Prime time for flooding: Current to 800 PM. Forecast rainfall: Typical showers and thunderstorms today have the potential to produce between 0.10" - 0.30" total in 10-30 minutes.

A moderate to strong thunderstorm will produce 0.30" - 0.60" total in 10-30 minutes.

An anchored thunderstorm or training of thunderstorms will have the potential to produce up to 1.25” in 60 minutes or less. 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: Strong to severe thunderstorms may also contain large hail, gusty winds, and frequent 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.