BMKG Detects Potential For Extreme Weather Triggers Susulant Disaster In Aceh-Sumbar

JAKARTA - The Meteorology, Climatology and Geophysics Agency (BMKG) has detected potential extreme weather that risks triggering further disasters in a number of areas in Aceh, North Sumatra and West Sumatra.

BMKG Deputy for Meteorology, Guswanto said that currently the presence of Meso Cyclone Convective Complex (Mesoscale Convective Complex/MCC) in the Indian Ocean west of Sumatra.

"This needs to be watched out for, especially for the Mandailing Natal area, North Sumatra, and the majority of West Sumatra," he said as quoted by ANTARA, Thursday, November 27.

The MCC is a large-scale, semi-circulating, long-lived, and organized collection of thunderstorms as meteorologists explain in a limited meeting across ministries/agencies and local governments led by the Coordinating Minister for Human Development and Culture (Kemenko PMK), Pratikno in Jakarta this afternoon.

Guswanto explained that the potential for moderate-very heavy rain can still occur even though Tropical Cyclone Senyar, which previously triggered hydrometeorological disasters in Aceh, North Sumatra, and West Sumatra, has weakened.

Tropical Senyar Cyclone is Tropical Cyclone 95B which has grown since November 21, 2025 in the eastern waters of Aceh, precisely in the Malacca Strait.

The impact in the past week the Aceh region, North Sumatra, West Sumatra was hit by rain every day, triggering flash floods accompanied by landslides with the impact of significant damage in a number of districts and cities.

"Then when entering the mainland of Aceh, the cyclone did not immediately become extinct and had time to rotate from East Aceh to Aceh Tamiang. That's why the impact became even more devastating because the system was on the mainland of Sumatra," he said.

The BMKG emphasizes that although Senyar has weakened, the presence of the MCC can extend the extreme weather period that affects the intensity of rain and the potential for further hydrometeorological disasters.

BMKG also appealed to local governments, emergency response teams, and the public to increase awareness of the risk of flooding, flash floods, landslides, and strong winds, especially in areas that were previously severely affected.

Guswanto also asked for media support to disseminate early warning information so that the public could take anticipatory steps from an early age. "We are ready together with the media and ask for help to compete for information on extreme weather early warning from the BMKG," he said.

Data on casualties, injuries, evacuation and damage to infrastructure in Aceh, North Sumatra, and West Sumatra are still dynamic and are in the process of collecting data on a joint team of officers deployed in each region.

However, based on a temporary report from the Pusdalops of the National Disaster Management Agency (BNPB), Thursday afternoon, flash floods and landslides spread across 13 districts/cities in the province.

The 13 areas hit by natural disasters consist of nine regencies and four cities, namely Langkat Regency, Central Tapanuli Regency, Mandailing Natal Regency, South Tapanuli Regency, and North Tapanuli Regency.

Likewise in West Sumatra, areas affected by flash floods and landslides include Agam, Padang Pariaman, Bukittinggi.

In Aceh, 10 of the 23 regencies/cities have declared a flood emergency status which has displaced 1,497 people and two residents have reportedly died.