I've been twice to Oklahoma. One was driving through on way to Tempe after 98 season. I remember the hotel in Elk City had it where you could put quarters in for the bed to vibrate.
The other time was visiting some of spouse's family who lived between Norman and the TX/OK border. They had a shelter but no tornadoes.
I think you can draw a line right along the I-35 north and south, and 98% of the state population is east of that.
My observations as a teen and young adult when I was a road warrior travelling to school and such (being single):
*My exposure to pine trees seems to be illegal west of Dallas
*The wind never stops blowing in West TX.
*Don't run out of gas in Texarkana (TX or AR). Not being able to decide what state a city is in really eff's it up.
*Montana is the bomb. I don't care what anyone says. Except the locals. They don't mind telling you to have a good time, but don't get comfy.
*Utah only looked good coming in on the plane.
*A hidden steak "barn" in a one block Montana ghost town had the best steak I've ever eaten.
*It's really hot in the Arizona desert on a lonely highway between the border an I-10 when you're dumb enough to take a girlfriend you'll never see again home to Long Beach, and your car overheats.
*Yuma ?! Who forces you to live in eff'ing Yuma ?!
*I don't know why they have state boundaries out west. It all looks the same.
*There is a whole lot of nothing running up the middle of the country. A lot of missing people can probably be found there.