Here’s why you heard tornado sirens in Johnson County on Tuesday when you normally wouldn’t

Johnson County tornado sirens

It wasn't the first Wednesday of the month, but Johnson County tested tornado sirens on Tuesday, March 8, as part of a statewide drill for Severe Weather Preparedness Week, March 7 to 11. Photo credit Timothy Vogel. Used under a Creative Commons license.

Johnson Countians heard something out of the norm today — tornado sirens. But local emergency officials say it was no cause for alarm.

Why it matters: The county normally tests its emergency siren system on the first Wednesday of each month.