Mountain-Originated Mesoscale Precipitation System in Northern Taiwan: A Case Study 21 June 1991

In the late morning of 21 June 1991, a convective precipitation system developed in the mountainous area in northern Taiwan. The convective precipitation system was organb.ed into a northeast-southwest oriented mesoscale line feature along the western mountain slope at a later time. More than 120 mm of rainfall poured down on Ta ipei and Keelong cities within 3 hours. The initiation, development; organization and dissipation of the storm were detected by a C-band Doppler weatlter radar on the northwest coast of Taiwan. In this paper, the role of mountains in organization and propagation of the mesoscale precipitation system is studied by using the Doppler radar data.