Abstract
On the basis of simultaneous observations of cumulonimbi using the millimeter-wave radar, the X-band radar, and photogrammetry, initiations of isolated cumulonimbi in the Kanto region of Japan were presented. These cumulonimbi were organized by the continuous generation of turrets. The growth speeds of turrets were quite different among the life cycle of the cumulonimbus. The values of the growth rates increased through the life cycle of cumulonimbus in the cases of the multi-turret, and varied from 2 m/s to 13 m/s. The time relationship between the generation of cumulonimbus clouds and the turret development is different among the cases analyzed in the study. The turret developed forty minutes after the cloud generation in the case of 23 August 2010.
