Thunderstorms and heavy rainfall are forecasted to occur starting from 23 April 2026, 15:00 WITA in parts of Kalimantan Utara especially in: Lumbis, Malinau Barat, Mentarang Hulu, Nunukan, Peso, Peso Hilir, Sebuku, Sei Menggaris, Sembakung, Tanjung Palas Timur, Tanjung Palas Utara, Tanjung Selor. 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 23 April 2026, 18:00 WITA.