JAKARTA - The DKI Jakarta Provincial Government has resumed weather modification operations (OMC) for the 12th day as an effort to anticipate the impact of extreme weather. This operation is carried out through the DKI Jakarta Regional Disaster Management Agency (BPBD) to reduce the potential for heavy rain that risks triggering floods.
The 12th day of the OMC was carried out on Tuesday, January 27, 2026, with four sorties using the CASA 212 A-2105 aircraft based at Halim Perdanakusuma Airport.
Cloud seeding was carried out in a number of areas around Jakarta, including the waters north of Jakarta, South Jakarta, Bekasi, and Bogor Regency.
Head of the DKI Jakarta Provincial BPBD, Isnawa Adji, said this operation was a proactive step to control the potential for high rainfall that could directly impact the Jakarta area.
"This 12th day weather modification operation is part of the DKI Jakarta Provincial Government's ongoing mitigation efforts in the face of potential extreme weather. All OMC implementation is based on analysis of atmospheric conditions and intensive weather monitoring, so that cloud seeding can be directed to safer areas," said Isnawa in his statement, Tuesday, January 27.
The first sorting was carried out in the morning with cloud seeding in the northern waters of Jakarta. The seeding was carried out at an altitude of 8,000 to 12,000 feet using 800 kilograms of Sodium Chloride (NaCl). The seeding area is at a distance of 30 to 50 nautical miles from Halim Perdanakusuma Airport.
The second batch was still carried out on the same day with the target area of South Jakarta. The seeding was carried out at an altitude of 6,000 feet with a target of Stratocumulus clouds. In this sorti, 800 kilograms of Calcium Oxide (CaO) were used.
In the afternoon, the third sorti was held with the sowing area in the Bekasi area. The sowing was carried out at an altitude of 5,000 to 7,000 feet using 800 kilograms of CaO sowing material.
Meanwhile, the fourth sorti was carried out in the afternoon with the target of the Bogor Regency area. Cloud seeding was carried out at an altitude of 5,000 to 7,000 feet, with an estimated flight time of less than one hour. In this sorti, 800 kilograms of Calcium Oxide were also used.
Isnawa said that the DKI Jakarta BPBD continues to conduct daily evaluations and strengthens cross-agency coordination to ensure preparedness for potential hydrometeorological disasters.
"The DKI Jakarta Provincial BPBD appeals to the public to remain vigilant against the potential for moderate to heavy rain that may be accompanied by lightning, thunder, and strong winds. The public is also expected to play an active role in maintaining environmental cleanliness and water channels to minimize the risk of flooding and flooding," he said.
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