As per reports, the Meteorology, Climatology and Geophysics Agency (BMKG) predicts that light to heavy rainfall accompanied by lightning will impact major cities in Indonesia on Monday (27 January);

• The potential for light rainfall or with rainfall of less than 2.5 mm per hour is predicted to fall on the cities of Banda Aceh, Pekanbaru, Bandar Lampung, Serang, Jakarta, Semarang, Yogyakarta, Surabaya, Denpasar, Palangka Raya, Palu, Gorontalo, Jayawijaya, Jayapura, Manokwari, and Ambon.
• Moderate rainfall of more than 4.0 mm per hour is predicted to fall on the cities of Medan, Pontianak, Makassar, and Nabire.
• Heavy rainfall of more than 50 mm per hour is predicted to impact city of Mamuju. Meanwhile, Tanjung Pinang, Bengkulu, Pangkal Pinang, Palembang, Jambi, Bandung, Mataram, Kupang, Banjarmasin, Tanjung Selor, Samarinda, Kendari, Manado, Ternate, Sorong, and Merauke are predicted to witness rainfall accompanied by lightning.
• BMKG also appealed to the public to be aware of the potential for high sea waves with a height of 2.5 meters – 4 meters in the North Natuna Sea.