抄録
In Japan, flooding damage of urban area caused by local heavy rainfall is increasing in recent years. It is of great importance to improve the precision of forecasting local heavy rainfall. However, present weather forecasting system cannot forecast the local heavy rainfall well in advance since local heavy rainfall has small scale and grow suddenly. In this study, therefore, we develop two early local heavy rainfall forecast techniques at Osaka city. One is the weather index technique, and the other is numerical weather forecasting technique by assimilating the X-band multi parameter radar(X-MP Radar). As a result, we can forecast local heavy rainfall earlier by weather index technique, and we can express the movement, strength and detail structure of local heavy rainfall using numerical weather forecasting technique by assimilating X-MP Radar.
