Due to the chilly air above, the atmospheric situations have grow to be unstable over a large space from western Japan to northern Japan, and rain clouds have developed domestically. From the fifteenth to the sixteenth, even stronger chilly air is predicted to move in, and the atmospheric situations are anticipated to grow to be extraordinarily unstable over a large space.
Source
The ambiance is predicted to be unstable over a large space on the sixteenth. Be cautious of heavy rain | NHK
