Very very similar travel path as the tornado in 1999:
The path of this year's tornado is red. Green is 1999.
I understand the Americans tend to call them "Tornado Alley", to describe areas which are frequently hit by tornadoes.
Oklahoma is perfectly placed to cop the full force of tornadoes because it is in the zone where polar air interacts with tropical air.
EDIT: My heart-felt sympathies go out to those people.