The seasonal and diurnal characteristics of localized convective rain events in Metro Manila, Philippines were examined using observations from 16 automated weather stations in the city during the years 2013–2014. After partitioning total rainfall to determine the proportion that is mainly due to localized convection, the diurnal patterns of frequency and intensity of convective rain were then investigated during the northeast monsoon (from November to March), summer (from April to May), and southwest monsoon (from June to October) seasons. Maximum changes in meteorological variables were used to further verify and characterize localized convective rain events over the city. Results show higher rainfall (by ~500 mm) over northern Metro Manila compared to the southern area throughout the period of study. Although total rainfall was highest during the southwest monsoon season, it was during the summer season, when the total rainfall was least, that the largest proportion of rainfall, i.e. 55%, was attributed to convective rain. Almost 45% of the total convective rain events were identified as localized rain events. During the summer season, localized convective rain events in Metro Manila were prominent and vigorous (i.e. greater change in meteorological variables) in the afternoon, and were noted to move along the direction of the prevailing wind, i.e. from the northeastern side of the city towards the west. Increased understanding of the meteorological characteristics of these localized rain events can help improve rainfall forecasting over Metro Manila, leading to better disaster risk reduction and resilience in the city.

利用2013-2014年间该市16个自动气象站的观测资料，对菲律宾首都马尼拉大都会的局部对流性降雨事件的季节和昼夜特征进行了研究。在划分总降雨量以确定主要由局部对流引起的比例后，在东北季风（11月至3月），夏季（4月至5月）和西南部，研究了对流雨的频率和强度的昼夜模式。季风（从六月到十月）的季节。气象变量的最大变化被用于进一步验证和表征城市上空的局部对流降雨事件。结果表明，与整个研究期间的南部地区相比，马尼拉大都会北部地区的降雨量更高（约500毫米）。尽管西南季风季节的总降雨量最高，但在夏季，总降雨量最少的是最大的降雨，即55％，是由于对流降雨。对流降雨事件中几乎有45％被确定为局部降雨事件。在夏季，马尼拉大都会地区的局部对流性降雨在下午尤为明显和剧烈（即，气象变量的变化更大），并注意到它们沿盛行风的方向移动，即从城市的东北侧向西方。对这些局部降雨事件的气象特征的更多了解可以帮助改善马尼拉大都会的降雨预报，从而更好地降低城市的灾害风险和抵御能力。