The Philippines will experience hot and humid weather over the next three days, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said Monday, March 30.

PAGASA weather specialist Aldczar Aurelio attributed the conditions to two prevailing weather systems: the ridge of a high-pressure area (HPA) and the easterlies. The HPA ridge is currently extending over Northern Luzon, while the easterlies are affecting the rest of the country.

Unlike a low-pressure area, the ridge of an HPA is an anti-cyclonic system generally linked to fair weather. The easterlies, meanwhile, are warm, moisture-carrying winds originating from the Pacific Ocean.

In the coming days, most areas can expect partly cloudy to cloudy skies with chances of isolated rain showers or thunderstorms, particularly in the afternoon and evening hours.

PAGASA cautioned, however, that severe thunderstorms — which may bring sudden heavy rainfall  could trigger flash floods or landslides in vulnerable areas.

As of Monday morning, Aurelio confirmed that no low-pressure area or tropical cyclone is being monitored within or near the Philippine area of responsibility.