Two prevailing weather systems are forecast to bring rainfall to most of the country on Tuesday, according to the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA).
The weather bureau reported that a shear line—the point where warm and cold air meet—will cause scattered rain showers and isolated thunderstorms over Eastern Samar, Southern Leyte, the Dinagat Islands, and Surigao del Norte.
PAGASA warned residents in these areas that moderate to heavy rains could trigger flash floods or landslides.
Meanwhile, the northeast monsoon, locally known as the amihan, continues to affect Luzon and the Visayas.
This system is expected to bring light rains to Metro Manila, Cagayan Valley, the Cordillera region, Central Luzon, Calabarzon, the Bicol region, Oriental Mindoro, Marinduque, and Romblon.
The rest of Luzon and Visayas may experience isolated light rains.
In Mindanao, localized thunderstorms are expected to bring isolated rain showers to the remaining parts of the region.
PAGASA also noted that moderate to strong winds and moderate to rough coastal waters will persist throughout the Philippine archipelago.
Currently, the bureau is not monitoring any low-pressure areas for potential tropical cyclone formation.