The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) issued a weather advisory for Tuesday, January 13, 2026, warning that four distinct weather systems will bring rains across various parts of the archipelago.
Multiple Systems Trigger Scattered Rains
According to the state weather bureau, a combination of the shear line, the Intertropical Convergence Zone (ITCZ), the northeast monsoon, and the easterlies will influence the country's weather patterns. The shear line is currently affecting the eastern section of Northern Luzon. This system is expected to cause scattered rain showers and isolated thunderstorms in the provinces of Cagayan, Isabela, and Aurora.
Mindanao and Luzon Under Weather Watch
In Southern Mindanao, the Intertropical Convergence Zone (ITCZ) is prevailing over the Davao Region, bringing similar conditions of scattered rains and thunderstorms. PAGASA specifically cautioned that moderate to heavy rains in the affected areas of Luzon and Mindanao could lead to possible flash floods or landslides.
Meanwhile, the northeast monsoon, locally known as "amihan," continues to affect the rest of Northern Luzon. It will bring light rains over the Cordillera Administrative Region and Cagayan Valley. Isolated light rains are also forecast for the Ilocos Region and Central Luzon due to the amihan.
Metro Manila and Rest of Country
For Metro Manila and the remaining parts of the Philippines not affected by the other systems, the weather will be influenced by the easterlies. Residents can expect isolated rain showers or thunderstorms, typically occurring in the afternoon or evening.
The forecast also includes wind and sea conditions:
- Northern Luzon, Eastern Central Luzon, Southern Luzon, Visayas, and Eastern Mindanao: Moderate to strong winds with moderate to rough seas.
- Other areas: Light to moderate winds and slight to moderate coastal waters.
In a related development, PAGASA reported that as of 2 a.m. on Tuesday, no low-pressure area is being monitored for potential tropical cyclone formation. This provides a brief respite from storm threats, though the current weather systems remain a significant concern for localized flooding and landslides.
