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The original item was published from 4/6/2020 4:41:00 PM to 4/7/2020 12:00:01 AM.


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Posted on: April 2, 2020

[ARCHIVED] April 6 ROUTINE TESTING Emergency Warning Sirens to Start

Boulder County will begin audible ROUTINE TESTING of the countywide emergency sirens at 10am and 7pm on Monday, April 6.


The test is the first of the monthly emergency audible siren tests, which take place each year on the first  Monday of each month from April through Aug.

The audible siren tests will occur twice on each testing day, at 10am and 7pm on April 6, May 4, June 1, July 6, and Aug. 3.  Should Boulder County experience severe weather during one of the planned audible tests, the siren tests for that day may be cancelled. For information, visit  

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

The annual siren testing is a good reminder for residents to sign up for emergency alerts at   

Residents are also 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 and

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