STRUCTURE OF A TYPHOON RAINSTORM IN THE MIDDLE LATITUDES OBSERVED WITH DOPPLER RADARS.

Abstract

Near the eastern part of Japan, typhoons, which are usually under transformation into extratropical cyclones, often cause heavy rainfalls. Kurashima (1973) showed that typhoons caused eleven out of twenty extremes of daily rainfall amount over Japan. Typhoon 8124 (Gay) which passed over the sea to the east of the Kanto district on 22 October 1981 caused heavy rainstorm around Tokyo during its approach to the district. The rainfall amounted to 114 mm for three hours from 2100 to 2400JST at Tsukuba. The authors observed the rainstorm by two Doppler radars of M. R. I. The objectives of this research are to study the structure of the rainstorm in relation to the hurricane eyewall system and to evaluate the water budget of precipitation particles. Refs.