BMKG: Extreme Rain Triggers Hydrometeorological Disaster In Banyumas

The Meteorology, Climatology and Geophysics Agency (BMKG) stated that rain with very heavy to extreme intensity in Banyumas Regency, Central Java, from Wednesday to Thursday morning triggered a hydrometeorological disaster.

Head of the BMKG Technician Group of Meteorological Station Tunggul Wulung Cilacap Teguh Wardoyo said yesterday's rainfall in several areas was recorded to be very heavy (100-150 millimeters) to extreme (above 150 millimeters).

"Based on data, extreme rain in Banyumas Regency was recorded in Gumelar (157 mm), Samudera Garden (163 mm), Tumbang Dam (184 mm), and Rempoah (226 mm). Very heavy rain was also observed at Kertadirjan Dam (110 mm) and Jatilawang (107 mm)," he said in Cilacap, Antara, Thursday, September 11.

Meanwhile, in Cilacap Regency, he said, the rainfall on Wednesday was recorded to be heavy (50-100 mm) to very heavy.

Heavy rains occurred in Nusawungu with a rainfall of 105 mm, while heavy rains were almost even throughout Cilacap, including Maos (80 mm), Jeruklegi (61 mm), Cipari (58 mm), Majenang (90 mm), and Wanareja (60 mm).

"This heavy and extreme rain causes flooding in Cilacap and landslides in Banyumas," he said.

Furthermore, he said the high rainfall was influenced by several atmospheric dynamics factors, namely the presence of a negative Dipole Mode Index (DMI) which reached minus 1.27, which had an impact on increasing rainfall in the western part of Indonesia.

"DMI is a phenomenon of sea-atmosphere interaction in the Indian Ocean," he said.

In addition, he said, weather conditions were also influenced by the Madden-Julian Oscillation (MJO) phase 3 in the Indian Ocean which contributed significantly to the formation of rain clouds.

According to him, other factors in the form of low pressure observed in the Indian Ocean in the southwest of Sumatra.

In this regard, he appealed to the public to remain vigilant, because rain with moderate to heavy intensity still has the potential to occur on Friday (12/9).

"Therefore, the potential for hydrometeorological disasters, such as floods and landslides, needs to be anticipated," said Teguh.