爆弾 ばくだん てい気圧 きあつじゃありませんでした
baku danteikiatsujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 爆弾低気圧

1. It was not a bomb low-pressure system.; It wasn't a bomb cyclone.

Past/Perfective
Negative
Polite
Terminal Form