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The original item was published from 8/7/2017 8:13:00 AM to 8/7/2017 1:01:54 PM.


City News

Posted on: August 6, 2017

[ARCHIVED] Emergency warning sirens to be tested monthly on the first Monday at 10am & 7pm

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Boulder County will perform audible testing of the countywide outdoor emergency sirens at 10am on the first Monday of the month. The test is one of the monthly emergency audible siren tests, which take place annually on the first Monday of each month from April through August.

The audible siren tests will occur twice on each testing day, at 10am and 7pm Testing dates are April 3, May 1, June 5, July 3, and August 7.

Siren tests ensure that all systems and procedures are working properly during the season of peak flood danger. The tests also promote public awareness of the warning sirens located throughout Boulder County.

The annual siren testing is a good reminder for residents to sign up for emergency alerts at  Should Boulder County experience severe weather during one of the planned audible tests, the siren tests for that day may be cancelled. For updated information, visit

Residents are encouraged to review their own emergency preparedness plans and discuss what they would do in the event of a flash flood or other emergency. For more information about personal preparedness, visit

Used to alert residents to potential danger from a flood or other immediate threat, there are 29 outdoor warning sirens in place across Boulder County, including Boulder, Erie, Jamestown, Lafayette, Louisville, Lyons, Marshall, Eldorado Springs, Superior, and the University of Colorado at Boulder.

All Boulder County sirens undergo weekly tests throughout the year, using a software program that performs a “silent” test.  For more information, visit

Learn what to do in the event an actual emergency siren sounds at 

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