Fig. 1

Weather parameters observed at the Phimai station on March 18, 2017. From top to bottom panels, wind direction, wind speed, temperature, humidity, pressure, rainfall, and high-pass filtered wind speed, temperature, humidity and pressure are presented, respectively. A very strong rainfall, its intensity more than 50 mm/hour, and an intense wind variation more than 8 m/s are seen around 07–08UT. This type of rapid variation is, so-called, a tropical squall