Don't sweat the tornadoes
As a survivor of 3 direct hits by tornadoes (yes, my parent's house is STILL standing - yay Dad and his obsession with safety features) there is generally a warning before they strike. The sky turns kind of gray, and you definetly hear what sounds like a train coming your way. However, the chances of running into a tornado are slim. My parent's have lived on the same property for 25 years and these tornadoes happened on two different days during that time period. The first tornado hit in October and the next two hit on Easter Sunday.
I guess I'm trying to say that running into a tornado is highly unlikely.
Have fun on your trip!
Lest anyone get the wrong idea!
I agree with some of the other recent posters on this topic. While tornados are a common phenomenon in the American plains and midwest, they are not something that a traveler needs to spend a lot of time worrying about.
I've been roadtripping in the 48 states since about 1961 (and before, actually, although my memory of those is nonexistent), and while I have passed through areas many times that have been struck by tornados in the near term, I have never seen one up close and personal. They are fairly localized events. Is it possible? Surely, but not likely for most people, unless you just happen to be in the right place at the right time.
Neither, by the way, are fires that much of a concern. If there is a fire along a particular route, then it is usually a simple matter to re-route around the closed areas on a different highway. Bob