TEMPO.CO, Jakarta - The Meteorology, Climatology, and Geophysics Agency (BMKG) explained the causes of extreme weather that hit Depok and Bogor on Tuesday, September 21.
According to the agency, the heavy rain and strong winds in the regions were generated by current atmosphere dynamics, which was a combination of the Madden-Julian Oscillation (MJO), Kelvin waves, and low-frequency sound waves.
“All three of them contributed to cloud formation in Indonesia's territory,” said the Bogor BMKG in a written statement on Tuesday, September 21.
The agency reiterated that based on satellite and weather radar monitoring, there were convective clouds covering Bogor and Depok areas between 2 p.m. until 6 p.m. with the maximum reflectivity value (50-55 dBZ) around northern Bogor and that in Depok occurred at 4:50 p.m. to 5:30 p.m. “This indicated moderate to heavy rain during that period.”
At least eight billboards crashed down and trees fell in eight points across Depok City, and hundreds of houses were damaged as a result of the bad weather. The Jakarta-Bogor Commuter Line trips were also disrupted due to fallen trees at Depok Station. Passengers were stuck at Manggarai Station.
The BMKG also detected a pattern of wind deceleration around the Java Sea to the north of West Java as well as the growth of rain clouds in parts of Bogor and Depok triggered by the lability index and high humidity.
The BMKG Head of Climate Analysis and Information, Adi Ripaldi, added that there was potential for extreme weather in Greater Jakarta during the transition period from the dry season to the rainy season. “At least in September-October,” Adi told Tempo on Wednesday, September 22.
SYIFA INDRIANI | TD