Community Warning Systems

[Rich Long]

First off I want to assure you this is not a troll post, I'm working on some research. I was hoping you could answer the following questions:

-In addition to sirens, what other technology have you seen to warn residents of a tornado?

-Have you seen anything you think is unique?

-What systems or combination of systemsdo you feel work the best?

I know these are subjective but I would like to hear everyones thought's

Thanks,