Kanto-Koshinetsu atmospheric instability anticipated to proceed; watch out of lightning strikes | NHK

The environment within the Kanto-Koshinetsu area is anticipated to stay extraordinarily unstable on the twenty ninth resulting from sturdy chilly air within the sky. There is a chance that cumulonimbus clouds could develop domestically, and you must watch out about lightning strikes, sturdy gusts of wind corresponding to tornadoes, sudden heavy rain, and hail.

Source