Multi-Source Observational Analysis of Significant Weather Conditions Associated with the Structural Damage at Terminal 3 of Soekarno–Hatta International Airport on 6 April 2026
DOI:
https://doi.org/10.35895/jpsi.2.2.118-133.2026Keywords:
convective storm, extreme rainfall, weather radar, satellite observations, airport infrastructureAbstract
On April 6, 2026, intense rainfall (45.0 mm within one hour) coincided with ceiling failure at Gate 7, Terminal 3, Soekarno-Hatta International Airport, reported at 13:49 WIB (06:49 UTC). This study examines the associated weather using C-Band radar (CMAX), Himawari-9 imagery, Automatic Weather Station (AWS) records, ERA5 Low-Level Moisture Transport (LLMT), and radiosonde soundings. A compact convective system developed over the airport during 06:04–07:00 UTC, with radar reflectivity of 40–45 dBZ and cloud-top brightness temperatures of −62 to −69°C. AWS rainfall began at 06:10 UTC, peaked at 18.6 mm per 10 minutes at 06:30 UTC, and reached 45.0 mm by 06:50 UTC, accompanied by a 7.6°C temperature decrease and gusts up to 11.5 m s⁻¹. Cloud Convective Overlays (CCO) showed convective cloud growth south of the airport during 06:20–06:50 UTC. ERA5 LLMT at 925 and 825 hPa indicated enhanced moisture transport and a strong gradient near the airport, although its 0.25° resolution cannot resolve individual cells. The 00 UTC sounding showed weak CAPE (109 J kg⁻¹) and moderate KI (33.5); the 12 UTC sounding was post-event. Rainfall accompanied deep convection, but its causal role in ceiling failure remains unproven.
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Copyright (c) 2026 La Ode Ashamad Nusriah, Syahrajad Al Syarqiyah (Author)
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