Thunderstorms and heavy rainfall are forecasted to occur starting from 19 December 2025, 00:00 WIB in parts of Riau especially in: Bangkinang, Bangkinang Kota, Bangko, Bangko Pusako, Bangun Purba, Batu Hampar, Bukit Batu, Gunung Sahilan, Kabun, Kampar, Kampar Kiri, Kampar Kiri Hilir, Kampar Kiri Hulu, Kampar Kiri Tengah, Kampar Timur, Kampar Utara, Kandis, Kepenuhan, Kepenuhan Hulu, Koto Gasib, Kuok, Langgam, Minas, Pangkalan Kerinci, Pekaitan, Pendalian Iv Koto, Pinggir, Pinggir, Pujud, Rambah Hilir, Rambah Samo, Rimba Melintang, Rokan Iv Koto, Rumbai Pesisir, Rumbio Jaya, Rupat Utara, Salo, Siak Kecil, Sinaboi, Sungai Apit, Sungai Mandau, Sungai Sembilan, Tambang, Tambusai, Tambusai Utara, Tapung, Tapung Hilir, Tapung Hulu, Tenayan Raya, Tualang, Xiii Koto Kampar. 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 19 December 2025, 03:00 WIB.