What I take issue with is the emergency broadcast system. Yes, you have told us already that there is a flash flood warning. You do not need to keep on doing it every 15 minutes. WE KNOW. The people who you are trying to reach know. In fact, they still have their sand bags up from the last time there was a warning / it flooded. I don't know why people live along the Des Plaines River which always floods every year, without fail. There's a giant project that's going to start to see if they can't fix it, but my money is on the river flooding again.
However, I have since found a way to fight this, but only through the DVR. Hit pause and mute, wait five minutes, and then undo mute and press play. I don't mind so much with the breaking into programs thing, but I don't really watch things where I have to worry about spoilers or much reality television. I think that's due to the nice people in fandoms winning. Also, the reality television I watch is on cable channels (Food Network, Bravo, Lifetime) so they don't break in for the news stuff.
However, if they could just do the scrolling for both weather and big news, I'd be a fan of it. I'd probably send in a letter to my local station praising their decision to the high heavens too and spread it around social media.