The state weather bureau on Tuesday warned of persistent rains across several parts of the country due to the combined effects of a shear line and the northeast monsoon (amihan).
In its 4 a.m. bulletin, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) reported that the shear line will bring cloudy skies with scattered rain showers and thunderstorms to the Visayas, Dinagat Islands, and the provinces of Albay, Sorsogon, and Masbate.
PAGASA forecaster Rhea Torres noted that rainfall between 50 mm and 100 mm is expected in Occidental Mindoro, Cebu, Leyte, Eastern Samar, Samar, Northern Samar, Sorsogon, and Biliran.
The weather bureau warned residents in these areas to remain alert for potential flash floods and landslides, particularly in low-lying and mountainous zones.
In Luzon, the northeast monsoon is forecast to bring cloudy skies and light rains to Cagayan Valley, the Cordillera Administrative Region, Central Luzon, Quezon, and the rest of the Bicol Region.
Metro Manila and the remainder of Luzon will experience partly cloudy to cloudy skies with isolated light rains.
Mindanao will generally have fair weather, though localized thunderstorms may cause brief rain showers.
A gale warning remains active for the northern and eastern seaboards of Luzon and the eastern seaboard of the Visayas.
Sea travel is discouraged for small seacraft in these areas due to rough conditions and wave heights reaching up to 4.5 meters.