MANILA — A convergence of three distinct weather systems is set to influence the Philippine archipelago, according to the latest advisory from the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA).

At the forefront is a shear line impacting the eastern expanse of Southern Luzon.

PAGASA’s 4 a.m. report indicates that this atmospheric phenomenon will usher in overcast skies accompanied by scattered rain showers and thunderstorms in areas such as Aurora, Quezon, Rizal, Laguna, Oriental Mindoro, Camarines Norte, Camarines Sur, and Catanduanes.

The agency issues a cautionary note, highlighting the potential for flash floods or landslides due to moderate to heavy rainfall in these regions.

Simultaneously, the northeast monsoon, locally known as “amihan,” will manifest itself, bringing cloudy conditions with precipitation to Northern and Central Luzon areas, including Cagayan Valley, Apayao, Kalinga, Mountain Province, and Ifugao.

PAGASA alerts residents in these zones to the risk of flash floods or landslides resulting from the anticipated moderate to heavy rains.

The influence of the northeast monsoon will extend to several other regions, including Metro Manila, Ilocos Region, Cordillera Administrative Region, Central Luzon, and Calabarzon. Expect a mix of partly cloudy to cloudy skies with sporadic light rain showers in these areas.

Meanwhile, easterlies will assert their impact on Visayas and Mindanao, resulting in partly cloudy to cloudy skies interspersed with isolated rain showers or thunderstorms across the rest of the country.

In Luzon, the northeast will bring moderate to strong winds and moderate to rough coastal waters. Conversely, Visayas and Mindanao will experience light to moderate east to northeast winds, with coastal waters ranging from slight to moderate. The varied weather conditions underscore the complex interplay of these three weather systems across the Philippine archipelago.

(JR AMIGO/AI/MNM)