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The original item was published from 4/29/2022 1:55:07 PM to 5/2/2022 9:49:56 AM.


City News

Posted on: April 29, 2022

[ARCHIVED] ROUTINE TESTING of emergency warning sirens on Monday, May 2

Siren testing (002)

Boulder County will be testing the countywide outdoor audible emergency sirens at 10am and 7pm on Monday, May 2. 

The monthly emergency audible siren tests take place on the first Monday of each month from May through August at 10am and 7pm. July will be skipped as it falls on Independence Day. The 2022 scheduled testing dates are May 2, June 6, and August 1. 

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

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

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