Emergency Management and Homeland Security

Full Test of Outdoor Warning Sirens on Wednesday

DENVER – The City and County of Denver will conduct a full 3 minute test of the outdoor warning siren system this Wednesday, May 13 at 11 a.m.  This test, conducted annually in advance of tornado season, will consist of all of the City’s outdoor warning sirens sounding simultaneously for a full 3 minutes.

If you hear an outdoor warning siren in Denver this Wednesday at 11 a.m., it is a test.  But as a reminder, if you hear outdoor warning sirens at any other time, seek shelter immediately and tune in to local media for further warnings or instructions. (Tornado shelter = a basement or interior room away from windows.). For additional information, please contact the Office of Emergency Management at (720) 865-7600.

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 Learn more about Denver’s Outdoor Warning Siren System and view a map of the siren locations

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 National Weather Service Mobile Decision Support Services (MDSS)

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The Mayor's Office of Emergency Management and Homeland Security

1437 Bannock Street, Room 3
Denver, CO 80202
Phone: 720-865-7600
Fax: 720-865-7691