JAKARTA - Rain has often flushed the Jakarta area and its surroundings in the last few days. As a result, a number of roads and settlements in Jakarta experienced flooding earlier this year.
Head of the DKI Jakarta Regional Disaster Management Agency (BPBD) Data and Information Center (Pusdatin) Muhammad Yohan revealed that no more weather modification operations (OMC) have been carried out since early January 2025.
"There has been no recommendation from the BMKG (Mitelology, Climatology and Geophysics Agency) for OMC. It is still being met," Yohan told reporters, Tuesday, January 14.
Yohan said the government had no plans to carry out weather modifications again as it was running at the end of 2024. At that time, OMC was carried out to minimize the impact of flooding during the turn of the year.
"The OMC is implemented for emergency conditions based on measurable considerations from the BMKG. Even though the rainfall is evenly distributed, the BMKG does not or has not recommended the implementation of OMC," he said.
For information, Jakarta is not hit by rain that has the potential to cause flooding during the 2025 New Year's Eve celebration. Acting (Pj) Governor of DKI Jakarta Teguh Setyabudi said this condition was influenced by the operation to modify the weather (OMC) which was carried out intensively during the period 25-31 December 2024.
During the six days of implementation, the weather modifications involved a total of 10 flight sorties with a duration of 19 hours 36 minutes. As many as 8,000 kilograms of material semai NaCl were used for cloud seeding.
"Although there were no flight activities on December 27, the results achieved during this period showed a significant decline in rainfall," Teguh said in his statement, Thursday, December 2.
Actual rain data obtained from the Global Stellite Mapping of Precipitation (GSMaP) satellite shows that rainfall in Jakarta during the OMC period ranges from 0 to 40 mm/day, with the peak rainfall reaching 40 mm/day on December 25.
"Before the OMC implementation, rainfall was recorded at 17.8 millimeters on December 24, 2024. During OMC, the maximum rainfall was recorded at 68 millimeters, without rainfall exceeding 100 millimeters," he explained.
The results of the OMC analysis, he continued, showed success in reducing the intensity of rain by 38 percent from predictions based on GSMap data, as well as 28 percent of the Global Forecast System (GFS) prediction of actual rainfall countering data.
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Previously, the DKI Provincial Government had held OMC on December 7-9 and December 12-15, 2024. The two OMC stages that had been implemented showed positive results, with a reduction in the intensity of rain reaching 20 percent.
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