Thunderstorms and heavy rainfall are forecasted to occur starting from 14 May 2026, 20:45 WIB in parts of Sumatera Utara especially in: Bahorok, Bajenis, Bandar Khalifah, Batang Kuis, Batang Serangan, Kampung Rakyat, Kutalimbaru, Medan Deli, Muara Batang Gadis, Padang Hilir, Padang Hulu, Padang Tualang, Pantai Labu, Rambutan, Sawit Seberang, Sei Bamban, Sei Bingei, Sei Lepan, Sibolangit, Tanjung Beringin, Tebing Syahbandar, Tebing Tinggi, Tebing Tinggi Kota, Torgamba, Wampu. 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 14 May 2026, 23:45 WIB.