Tornados are definitely not exclusive to the US, they form really in any storm that’s powerful enough, the reason they’re famous in the US’s tornado alley is because the land is so flat they can really take hold, and go for miles, here in Pittsburgh we actually get a few, but they have a hard time going more than hundred meters because it’s so hilly. Some places get less severe storms though, so terrain aside, it would be rare since they are usually formed from strong storms. (@DiamondGaming4 could probably give you the run down…)
Anywhere that has thunderstorms has the potential to have a tornado. Doesn’t matter where you are, as long as there’s proper conditions. In fact, tornadoes have been recorded in every continent except Antarctica.
Hmm. Bad weather might’ve occured before the tornado. If the airlines could’ve known that there would be some type of storm or tornado they should’ve left the airport