Maybe it’s an issue of how they are used in different cities. Ours were going off by 10 as I said. Ours in Urbandale do go off all the time. Basically it comes down to either we have to set them off for enough that they give people enough warning to pay attention or we need something separate for when you need to get to your basement.The siren went off in Ankeny at ~10:45 and the storm was full tilt around 11.
Tornados are tough because they show up on pretty short notice, just a few minutes time. I got sirens warning me of that tornado ahead of time, but at that time the threat was over Johnston. Had it just popped up over Ankeny, there probably would've been less notice. I don't know what to tell you there, they can't predict the exact location of a tornado ahead of time. That being said, tornados generally aren't at the front of a storm. If it's already storming out and the siren begins, one would think there's probably an advanced reason for it.
Again, like, this isn't complicated. If a siren goes off, there's probably a good reason for it. They aren't overused for every little storm.
When I was growing up the sirens meant to get in the basement. I was fine with that. Now they set them off for storms that are no where near as bad as yesterday.