But with this system they can send warnings to everyone in a very specific location immediately. It doesn't require gps or a data connection so it is much more effective.The Weather Underground app has done that for free via push notifications for over a year now. They let you pick which types of weather notifications (thunderstorm, tornado, flood, etc.) you want.
It's been really useful to me, as I don't usually listen to the radio or watch live TV.
And for people saying they can just see it on TV, that is just odd. Many people that this affects are not at home and if they are they may not have cable or watch live TV. This is a much more effective system.