I'd only offer one other bit of advice here. I live in OK and the NOAA weather radio woke me up day before yesterday, and that gave me an hour notice to get horses and chickens in before it hit here. It was a very fast moving and violent storm and they warned of hail the size of 1/2 dollars. So I jumped up, grabbed a jacket and ran outside to put the animals away. I was back inside for about 5 mins when it hit. If you don't have a NOAA weather radio, I'd get one and set it to give you warning of storms heading your way. I absolutely love having the advance warning that radio gives me.
I'm sorry you lost so many of your chickens, that just absolutely is heart rending.
I'm sorry you lost so many of your chickens, that just absolutely is heart rending.