Guerrilla rainstorm

A guerrilla rainstorm (ゲリラ豪雨 gerira gō'u) is a Japanese expression used to describe a short, localized downpour of over 100 mm of rain per hour caused by the unpredicatable formation of Cumulonimbus cloud. The term is often used by the Japanese media in reporting upon such events, but does not have an official meaning nor is it used by the Japan Meteorological Agency.

Guerrilla rainstorm

A guerrilla rainstorm (ゲリラ豪雨 gerira gō'u) is a Japanese expression used to describe a short, localized downpour of over 100 mm of rain per hour caused by the unpredicatable formation of Cumulonimbus cloud. The term is often used by the Japanese media in reporting upon such events, but does not have an official meaning nor is it used by the Japan Meteorological Agency.