ちょう高層 こうそう かみなり放電 ほうでんでしょう
chōkōsō kaminarihōdendeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 超高層雷放電

1. Probably a supertall building lightning discharge.

Polite
Presumptive
Conjecture