Time: 1026 PM Sun July 21, 2019 Forecaster: Alan Smith

MESSAGE 1
Flash Flood Prediction Program

LOW IMPACT FLOODING
PRIORITY DISSEMINATION RECOMMENDED

We have determined that low impact flooding is likely in the following counties: Boulder (City of Boulder not affected, Four Mile Burn Area not affected), Broomfield, Adams
including: Arvada, Lakewood
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from: Current to 1145 PM.
Prime time for flooding: Current to 1115 PM.
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Forecast rainfall: Thunderstorms will produce rainfall amounts of 0.4-1.2" in 10-30 minutes.
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The most likely areas to be impacted by flooding are:

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: A strong, slow-moving thunderstorm could produce heavy rainfall of up to 2.8" in 60-90 minutes. Excessive runoff is either imminent or already occurring. This LIF includes eastern portions of Boulder County, and includes Adams County west of US-85.

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.