Abstract
A detailed comparison is made between the rainfall distribution over land at intervals of 20 minutes and the radar echoes which were associated with Typhoon Vera in September 1959. Even at this short time scale, the association of the isohyet pattern with the radar echo distribution is not easily seen because the rainfall amount is very much enhanced in the mountain range and the orographic rain is not well detected by radars. An analysis of time changes of the 20-min rainfall amount reveals the existence of zones of strong rainfall intensity corresponding to radar rain bands. It is found that not only the rainfall amount but also its variability with time are dependent upon the elevation of rain-gauge stations. This suggests a mutual interaction between the orographic rain and the convection associated with the typhoon rain bands.
