Cloudy skies with moderate to occasionally heavy rains and thunderstorm are expected in parts of Luzon on Monday, the state weather bureau said.
The frontal system affecting extreme northern Luzon and the southwest monsoon is affecting the western section of northern and Central Luzon, the Philippine Atmospheric Geophysical and Astronomical Services Administration said.
The rains, which may spawn flashfloods or landslides, are expected over the provinces of Ilocos, Apayao, Batanes and the islands of Calayan and Babuyan.
Zambales and the rest of Ilocos and Cordillera region, will have cloudy skies with light to moderate rains and thunderstorms, Pagasa said.
Metro Manila and the rest of the country will have partly cloudy to cloudy skies with rainshowers or thunderstorms.
Light to moderate winds blowing from the southwest to south will prevail over Luzon and from the southeast to south over Visayas and Mindanao, Pagasa said.
The coastal waters throughout the archipelago will be slight to moderate, it added. FM