Twenty new outdoor warning sirens have been installed across Boulder County and county officials will run a systemwide test at 10 a.m. on Friday, Sept. 19.

The test will last approximately three minutes. During this time, residents will hear:

• Five short beeps.
• A voice message stating, “This is a test.”
• A siren tone.
• A closing voice message repeating, “This is a test.”

This test is the final part of the installation process to ensure the upgraded sirens are operating properly and ready to alert the community in the event of an emergency.