that's not the question.
the question is what if tornados ranging from 322 km\h to 1000 km\h would regularly appear, and you'd have houses which are built to stand winds up to 600 km\h.
wouldn't you need a more detailed warning system?

but that's just how Shonen Manga goes, easy enemy, incredibly strong enemy, now you're the fighting the bests in the world, which are somehow more numerous than who you met before...