Research on dangerous prospect of a baby cell of GUerrilla-heavy rain by analysis in terms of vorticity that uses Doppler velocity

Abstract

A lot of regional heavy rains that are called a Guerrilla-heavy rain are reported in our country starting with the disaster in the Hyogo Prefecture Toga river on July, 2008. In recent years, such disasters become a problem. As part of measures of such disasters, we research about dangerous prospect of baby cells of Guerrilla-heavy rain by analysis in terms of vorticity that uses Doppler velocity. we define two vortexes with different size, and evaluate a relationship qualitatively between rainfall and the existence of vortex.