Three weather systems, namely the northeast monsoon, shear line, and the intertropical convergence zone (ITCZ), are expected to bring varied weather conditions across the Philippines on Friday, December 13.
The ITCZ will cause scattered rains and thunderstorms over Basilan, Sulu, and Tawi-Tawi in Southern Mindanao.
The Bicol Region and Quezon will experience similar conditions due to the easterlies, with PAGASA warning of potential flash floods or landslides from moderate to heavy rains.
The northeast monsoon will bring light rains to Cagayan Valley, Apayao, Kalinga, Mountain Province, and Ifugao, along with isolated light rains over the Ilocos Region, Central Luzon, and the rest of the Cordillera Administrative Region.
Metro Manila and the rest of Calabarzon, along with portions of Mimaropa, may experience rain due to localized thunderstorms.
The rest of the archipelago will have isolated rain showers or thunderstorms also due to the easterlies.
No low pressure area is currently being monitored for possible tropical cyclone formation.
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