Thunderstorms and heavy rainfall are forecasted to occur starting from 25 October 2026, 08:50 WIB in parts of Sumatera Utara especially in: ADIAN KOTING, AFULU, ALASA, ALASA TALUMUZOI, AMANDRAYA, ANDAM DEWI, ANGKOLA BARAT, ANGKOLA SANGKUNUR, ANGKOLA SELATAN, ANGKOLA TIMUR, ARAMO, BADIRI, BAKTIRAJA, BALIGE, BARUS, BARUS UTARA, BARUSJAHE, BATAHAN, BATANG ANGKOLA, BATANG NATAL, BATANG ONANG, BATANG TORU, BAWOLATO, BERAMPU, BERASTAGI, BONATUA LUNASI, BORONADU, BOTOMUZOI, BUKIT MALINTANG, DANAU TOBA, DOLAT RAYAT, DOLOK PANRIBUAN, DOLOK PARDAMEAN, DOLOK SANGGUL, DOLOK SILAU, FANAYAMA, GIDO, GIRSANG SIPANGAN BOLON, GOMO, GUNUNG MERIAH, GUNUNG SITEMBER, GUNUNGSITOLI, GUNUNGSITOLI ALO'OA, GUNUNGSITOLI BARAT, GUNUNGSITOLI IDANOI, GUNUNGSITOLI SELATAN, GUNUNGSITOLI UTARA, HARANGGAOL HORISON, HARIAN, HIBALA, HILIDUHO, HILIMEGAI, HILISERANGKAI, HULU SIHAPAS, HURUNA, HUTA BARGOT, IDANOGAWO, IDANOTAE, JORLANG HATARAN, JUHAR, KABANJAHE, KERAJAAN, KOLANG, KUTABULUH, KUTAMBARU, LAE PARIRA, LAHEWA, LAHEWA TIMUR, LAHOMI, LAHUSA, LAUBALENG, LINGGA BAYU, LINTONG NIHUTA, LOLOFITU MOI, LOLOMATUA, LOLOWAU, LOTU, LUAHAGUNDRE MANIAMOLO, LUMBAN JULU, LUMUT, MA'U, MANDREHE, MANDREHE BARAT, MANDREHE UTARA, MANDUAMAS, MANIAMOLO, MARANCAR, MARDINGDING, MAZINO, MAZO, MERDEKA, MEREK, MORO'O, MUARA, MUARA BATANG GADIS, MUARA BATANG TORU, MUNTE, NAGA JUANG, NAINGGOLAN, NAMAN TERAN, NAMOHALU ESIWA, NATAL, O'O'U, ONAN GANJANG, ONAN RUNGGU, ONOHAZUMBA, ONOLALU, PADANG BOLAK JULU, PADANGSIDIMPUAN ANGKOLA JULU, PADANGSIDIMPUAN BATUNADUA, PADANGSIDIMPUAN HUTAIMBARU, PADANGSIDIMPUAN SELATAN, PADANGSIDIMPUAN TENGGARA, PADANGSIDIMPUAN UTARA, PAGARAN, PAGINDAR, PAHAE JAE, PAHAE JULU, PAKKAT, PALIPI, PAMATANG SILIMA HUTA, PANDAN, PANEI, PANGURURAN, PANOMBEIAN PANE, PANYABUNGAN UTARA, PARANGINAN, PARBULUAN, PARLILITAN, PARMONANGAN, PASARIBU TOBING, PAYUNG, PEGAGAN HILIR, PEMATANG SIDAMANIK, PERGETTENG GETTENG SENGKUT, PINANGSORI, POLLUNG, PORSEA, PULAU-PULAU BATU, PURBA, PURBA TUA, RANTO BAEK, RAYA, RONGGUR NIHUTA, SALAK, SARUDIK, SAWO, SAYUR MATINGGI, SIABU, SIANJAR MULA MULA, SIANTAR, SIANTAR MARIMBUN, SIATAS BARITA, SIBABANGUN, SIBOLGA KOTA, SIBOLGA SAMBAS, SIBOLGA SELATAN, SIBOLGA UTARA, SIBORONG-BORONG, SIDAMANIK, SIDIKALANG, SIDUA'ORI, SIEMPAT NEMPU, SIEMPAT NEMPU HILIR, SIEMPAT NEMPU HULU, SIEMPAT RUBE, SIJAMAPOLANG, SILAHISABUNGAN, SILIMA PUNGGA PUNGGA, SILOU KAHEAN, SIMANGUMBAN, SIMANINDO, SIMPANG EMPAT, SINUNUKAN, SIPAHUTAR, SIPIROK, SIPOHOLON, SIRANDORUNG, SIROMBU, SITAHUIS, SITELU TALI URANG JEHE, SITELU TALI URANG JULU, SITINJO, SITIO-TIO, SITOLU ORI, SOGAE'ADU, SOMAMBAWA, SOMOLO-MOLO, SORKAM, SORKAM BARAT, SOSOPAN, SOSOR GADONG, SUKA BANGUN, SUMBUL, SUSUA, TAMPAHAN, TANAH MASA, TANAH PINEM, TANO TOMBANGAN ANGKOLA, TAPIAN NAULI, TARABINTANG, TARUTUNG, TELUK DALAM, TIGABINANGA, TIGALINGGA, TIGANDERKET, TIGAPANAH, TINADA, TOMA, TUGALA OYO, TUHEMBERUA, TUKKA, ULU MORO'O, ULUAN, ULUGAWO, ULUNOYO, ULUSUSUA, UMBUNASI. These conditions may lead to reduced visibility, strong winds, and localized flooding. The public is strongly advised to remain vigilant during this period, limit outdoor activities, and take all necessary precautions to ensure safety. Conditions are expected to gradually improve by 25 October 2026, 11:50 WIB.