A new low pressure area (LPA) east of Visayas has developed on Monday afternoon, according to the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA).
As of 3 p.m. Monday, the weather disturbance was estimated at 480 kilometers east of Guiuan, Eastern Samar, and embedded within the intertropical convergence zone (ITCZ) that is extending across Southern Luzon, Visayas, and Mindanao.
PAGASA said the combined effects of the LPA and ITCZ may bring scattered light to moderate rain showers with occasional heavy rains during thunderstorms over Visayas, Oriental Mindoro, Occidental Mindoro, Marinduque, Romblon, Palawan, Albay, Camarines Norte, Camarines Sur, Catanduanes, Sorsogon, Masbate, Bukidnon, Camiguin, Misamis Occidental, Misamis Oriental, and Lanao del Norte.
The ITCZ is a region near the equator where winds from various directions converge, which is usually a breeding ground for localized thunderstorms, and sometimes, a potential low pressure area.
Metro Manila and the rest of the country will be partly cloudy to cloudy with isolated rain showers due to the ITCZ and localized thunderstorms.
It will remain warm over the rest of the country but chances of short-lived heavy rains in the afternoon or evening are still expected.
PAGASA warned that sudden heavy rainfall may trigger flash floods or landslides in areas that are highly susceptible to these hazards.
No gale warning has been raised in any part of the country on Monday afternoon but PAGASA still advised seafarers and fisherfolk using small boats to remain alert in the event of severe thunderstorms as sea condition may become rough.