爆弾 ばくだん てい気圧 きあつではありませんでした
bakudante iki atsudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 爆弾低気圧

1. Was not a bomb low-pressure system.; Was not a bomb cyclone.

Past/Perfective
Negative
Polite
Formal Register