The National Weather Service has issued a FLOOD WATCH for: the following counties: Boulder (City of Boulder affected, Four Mile Burn Area affected), Jefferson, Broomfield, Douglas, Adams, Denver, Arapahoe
including: DIA, the City of Aurora, Arvada, Wheat Ridge, Lakewood from: 900 AM to 1200 PM SATURDAY. The National Weather Service in Boulder has issued a Flood Watch for the entire District from 9am until noon tomorrow, the 26th.
Prime time for flooding: 900 AM to 1200 PM SATURDAY. Forecast rainfall: Weak to moderate thunderstorms will produce rainfall rates of 0.25-0.75” in 10-30 minutes. Strong thunderstorms will have the potential to produce rainfall rates of 0.75-1.25” of rain in 10-30 minutes. A slow moving strong thunderstorm or training of thunderstorm cells may result in up to 2.0” of rain in 60-90 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: Heavy rainfall may result in excessive runoff and isolated flooding in and around the District today and into tomorrow. Strong thunderstorms may also contain hail, gusty winds, and frequent cloud-to-ground lightning.

A Flood Watch means that flooding is possible within the watch area.

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.