Jakarta – The potential for high rainfall is predicted in a number of areas until January 2026. This is based on the presentation by the Meteorology, Climatology and Geophysics Agency (BMKG) regarding weather conditions, atmospheric dynamics and potential hydrometeorological risks at the Ministerial Coordination Meeting Preparation for the 20225u Christmas and New Year 20225u2. Quote from the official BMKG website, Plt. Chief Secretary, Guswanto said that the period December 2025 to January 2026 coincides with the peak of the rainy season, thereby increasing the potential for high to very high rainfall in a number of regions, particularly: Java Bali, NTB, NTT South Sulawesi South Papua Most of Kalimantan. During this Christmas period, BMKG mapped the weather dynamics in three periods, namely: Scroll TO GO WITH CONTENT December 15-22 which is dominated by heavy rain; December 22-29 which tends to decline; and December 29-January 10 which increased again as the height of the rainy season shifted to Java Island. “What you need to be careful about is the high intensity of rain, strong winds, high waves, as well as the potential indirect impact of tropical cyclone seeds. These conditions can affect land, sea and air transport activities during Christmas,” he said. He also explained that a number of atmospheric phenomena are predicted to be simultaneously active during the Christmas period, such as the Asian Monsoon, Madden Julian Oscillation (MJO), Kelvin and Rossby atmospheric waves, weak La Niña, as well as the emergence of tropical cyclone seeds that can intensify and strengthen the intensity of the cyclone seed and the cyclone seed. winds in various regions. Potential growth of Cumulonimbus clouds For air transport, the growth of Cumulonimbus clouds (Cb) is still a concern because it can cause intensive rain. However, mitigation has been underway since the beginning through the provision of official BMKG flight documents. “All pilots have taken flight documents from the official BMKG website, so the hope is that this will not have a worse impact. So this means that BMKG has also provided steps to mitigate this,” said Guswanto. Marine Activity and Potential for Seal Floods In the shipping sector, some water areas are predicted to experience waves of 2.5-4 metres, while areas near Natuna could exceed 6 meters in January. BMKG also provides information on the potential for tidal waves based on moon phases for various coastal areas in Sumatra, Java, Bali, Nusa Tenggara and Maluku. Areas affected by tidal waves, such as Pontianak, are also receiving enhanced information to support regional responses. BMKG prepares weather modification operations As a direct mitigation measure, BMKG together with BNPB, regional governments and BUMN are preparing Weather Modification Operations (OMC) in Aceh, North Sumatra, West Sumatra, West Java and East Java. OMC is focused on reducing rain intensity in high-risk areas, although attention is still paid to technical limitations, especially when the influence of tropical cyclones occurs. BMKG also strengthens preparedness through real-time weather information services that can be accessed by the public and stakeholders, including InfoBMKG, Digital Weather for Traffic BMKG (land transport), Ina-SIAM (aviation) and InaWIS (shipping). All satellite-based information is updated every 10 minutes and can be accessed by the public and transport operators. “BMKG is committed to providing the latest weather information, timely early warnings and technical support to all stakeholders to maintain public safety during the Christmas period,” he said. (squeeze/squeeze)