BMKG Warns of Heavy Rainfall in Three Central Java Regencies

Purwokerto (ANTARA) – The Meteorology, Climatology and Geophysics Agency (BMKG) has placed Banyumas, Brebes and Purbalingga regencies in Central Java on alert for heavy rainfall during the second ten-day period of November 2026, from 11 to 20 November.

“The early warning of heavy rainfall should be taken seriously by local governments and the public as they prepare for potential hydrometeorological disasters caused by increased rainfall,” Goeroeh Tjiptanto, head of BMKG’s Central Java Climatology Station, said when contacted from Purwokerto on Wednesday.

According to BMKG’s early weather and climate warning for the period, the alert status applies to areas where rainfall is expected to reach 200–300 millimetres per ten-day period, he said.

In addition to the three regencies on alert, BMKG has placed 13 other regencies and cities in Central Java under a watch status, with expected rainfall of 150–200 millimetres per ten-day period.

“We also forecast the potential for heavy rain in several parts of Central Java during the second ten-day period of November 2026,” he said.

Heavy rain could affect several sub-districts in Banyumas, Brebes, Purbalingga, Banjarnegara, Pekalongan and Pemalang from 11 to 13 November, he forecast.

From 14 to 16 November, areas at risk are expected to extend to Cilacap, Tegal, Banyumas, Brebes, Purbalingga, Banjarnegara, Pekalongan and Pemalang regencies.

From 17 to 20 November, heavy rain is forecast in several sub-districts of Tegal, Brebes, Cilacap, Banyumas, Purbalingga and Pemalang regencies.

As for global climate patterns, the Indian Ocean Dipole (IOD) index stood at a positive 0.696 in the third ten-day period of October 2026. “The positive IOD is forecast to persist until the end of 2026,” he said.

The monthly ENSO index in the Nino 3.4 region stood at +3.37, indicating very strong El Niño conditions, which are predicted to continue into early 2027, he said.

In view of these conditions, he urged local governments and residents to use the early warning information to heighten preparedness and take mitigation measures against the impact of hydrometeorological disasters.

“More detailed weather forecasts and early warnings, down to sub-district level, are available through the Info BMKG app and the agency’s official website,” Goeroeh said.