THE tropical depression which is still outside the country continues to enhance the southwest monsoon that will bring rains over Northern Luzon, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said on Monday.

PAGASA said Batanes, Calayan and Babuyan Group of Islands will experience occasional rains because of southwest monsoon enhanced by the tropical depression.

PAGASA also said that Mindanao will have cloudy skies with light to moderate rains and thunderstorms due to Intertropical Convergence Zone (ITCZ) affecting Southern Mindanao.

The ITCZ, which is the thick clouds coming from the south of Asia, is considered a breeding ground for low-pressure areas (LPAs) or potential cyclones while southwest monsoon is the dominant weather system during the rainy season.

Meanwhile, the rest of the country including Metro Manila will be partly cloudy to cloudy with isolated rainshowers or thunderstorms.

Strong to gale force winds associated with the surge of southwest monsoon as enhanced by the tropical depression would affect the northern seaboard of Northern Luzon.

“Fishing boats and other small seacrafts are advised not to venture out into the sea while larger sea vessels are alerted against big waves," it warned.

It added that moderate to strong winds coming from the southwest will prevail over Luzon and its coastal waters will be moderate to rough.

Light to moderate winds coming from the southwest to south will prevail over the rest of the country with slight to moderate seas. (PNA)