Thunderstorms and heavy rainfall are forecasted to occur starting from 27 September 2026, 14:00 WIB in parts of Kalimantan Barat especially in: AMBALAU, BATU AMPAR, MATAN HILIR SELATAN, MATAN HILIR UTARA, MERANTI, MUARA PAWAN, NGABANG, PULAU MAYA, SENGAH TEMILA, SUKADANA, TELUK BATANG. 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 27 September 2026, 17:00 WIB.