MANILA, Philippines: At least four weather systems – shear line, northeast monsoon, easterlies and localized thunderstorms – will be affecting most parts of the country over the next 24 hours, the state-run weather agency said on Monday.

Weather specialist Robert Badrina of the Philippine Atmospheric Geophysical and Astronomical Services Administration (Pagasa) said the combined effects of shear line and easterlies are bringing overcast skies with scattered rain showers and thunderstorms over Eastern Visayas, Capiz, Aklan, Iloilo, Bicol Region and Romblon.

The Pagasa forecaster said the northeast monsoon or "amihan" is affecting Metro Manila and the rest of Luzon where cloudy skies with isolated light rains may prevail.

"It would still be colder nights and mornings, especially over Luzon in the coming days due to amihan," he said.

Citing Pagasa's data and analysis, he said they have not monitored any tropical cyclone or low pressure area inside and outside the country's area of responsibility until over the weekend.

The easterlies, along with the localized thunderstorms, are bringing either isolated heavy rains or thunderstorms over the rest of the country, the state weather bureau said.

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