Based on the wind vertical profiles observed by Doppler radar (SA) and wind profiler radar (TWP8-L) in Chongqing, China during 2013, this study explored the characteristics and evolutions of wind profiles under four different weather conditions related to rainfall (i. e., clear sky, light rainfall, moderate rainfall and heavy rainfall). Our analyses found that:(1) Under the weather condition of clear sky or light rainfall, the moisture condition is so weak that the wind vertical profiles observed by Doppler radar are mostly identified as "ND" (No Data) and wind speeds (directions) observed by wind profiler radar are weak (ill-organized). Meanwhile, the observed vertical wind shears are weak and ill-organized as well, inhibiting the development and sustenance of convection systems; (2) Under the weather condition of moderate rainfall, precipitations are well distributed over regions, and hourly accumulated precipitation amount is little. In terms of the wind vertical profiles, the low-middle winds are ill organized, while a uniformsouthwest by west jet is evident at the middle-high levels. Also, the wind vector maps are featured by a good unidirection in the vertical wind shears. All these processes favor the development and sustenance of convection systems; (3) Under the weather condition of heavy rainfall, the wind vertical profiles present good consistency between observations by Doppler radar and wind profiler radar. In particular, during the pre-precipitation period, wind changes gradually from easterlies at the low level to westerlies at the high level, which favors triggering convections. During the precipitation period, especially when the rain (convection) is the heaviest (most intense), the vertical wind shears are featured by a good unidirection and low-level jets are present at the low-middle levels, both favoring the sustenance of convection systems. During the post-precipitation period, the winds become weak, northerlies are gradually present at the low-middle levels, and convection systems start to decay, which contribute to the end of precipitation.
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