The first approximation energy considerations quoted in the article and elsewhere in the comments here are not the same as a model of what happens in a physical system when you set off a bomb in a hurricane.
What a hydrogen bomb tends to do is to expel a cylinder of atmosphere straight upwards. Why didn't they ever build bombs greater than a 100 megatons? Not because it would have been too hard. It is easy to do. Instead, past 100 megatons, the extra energy just expels that cylinder of air into outer space even faster. So there is no reason to build a larger bomb.
What happens to a hurricane when a chunk at its center is launched into outer space? Or several chunks? Teller thought it was worth finding out. And there are very few physicists fit to lace up that man's boots. So it might be worth investigating.