Abstract
The characteristics of meso-β scale rainfall observed by a single Doppler radar are presented. Horizontal wind is estimated by VAD analysis and obtained from upper-air chart. AMeDAS data is also used with analysis of rainfall characteristics. We obtained the following results.(1) The direction of vertical shear of the prevailing wind is parallel to the rainband.(2) The rainband is formed by several cells which are composed of cumulonimbus clouds.(3) Relative warm air on the ground was supplied from the side or front of the rainband.(4) Convective clouds with a great echo intensity stand in vertical direction and clouds above that tilt to the windward, when the direction of vertical shear of the prevailing wind changes in altitude.(5) Rain layer with a great echo intensity was formed by a strong updraft.(6) the advection velocity of rainband was the same as one of the prevailing wind at 6km in altitude which is at the top of radar echo.
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