Processed ADTD Cloud-to-Ground Lightning and Doppler Radar Data and Analysis Code for Thunderstorms Crossing Cities in Three Urban Agglomerations of China, 2020–2025

This dataset contains processed data and analysis code associated with the manuscript “Dependence of Cloud-to-Ground Lightning Activity on City Size: Observational Evidence From Thunderstorms Crossing Cities in Three Urban Agglomerations of China.” The study uses warm-season Advanced Time of Arrival and Direction (ADTD) cloud-to-ground lightning observations and Doppler weather radar data from 2020–2025 to investigate thunderstorms crossing cities in the Beijing–Tianjin–Hebei region, Yangtze River Delta, and Guangdong–Hong Kong–Macao Greater Bay Area.

A total of 3,825 thunderstorms crossing cities were identified and classified into Type1, Type2, and Type3 according to total cloud-to-ground flash count and event duration. The deposited files include processed event-level data supporting the main analyses, including thunderstorm characteristics, city and city-size classifications, thunderstorm types, relative lightning density (RLD) between urban and rural reference areas, positive RLD contributions in storm-motion-relative sectors, relative positive flash rate (RPFR), and relative peak current (RPC).