You might want to nix that meditation session you had planned for noon Wednesday.

That's when Cobb County emergency officials will be testing all 70 outdoor warning sirens scattered throughout the county, according to its Facebook page.

READ | Cobb call center lays off 635 workers, will open new location

The sound blast will last between three and five minutes.

This is all dependent on the weather, according to the post. If the weather is bad enough, the test will happen Thursday.

Here are the locations of the sirens.

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