THE western parts of Luzon and Visayas may experience moderate to heavy rains due to frequent occurrence of rain showers and thunderstorms, the state weather bureau said on Saturday.

Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) acting administrator Vicente Malano said rainy season is likely to start in the next couple of days.

"The prevailing weather condition of the country is warm and humid characterized by frequent occurrence of rain showers and thunderstorms in the afternoon or evening. This development signifies the imminent onset of the rainy season under Type 1 climate, which covers the western parts of Luzon and Visayas and may set in within the next few days," Malano said in a statement.

"It is expected that in the coming days, moderate to heavy rains will be experienced over the most parts of Western Luzon and Western Visayas due to the low pressure area (LPA) and the southwest monsoon," he added.

As of 4 a.m. Saturday, the weather bureau said the LPA was spotted at 310 kilometers east of Eastern Samar.

Pagasa said cloudy skies with light to moderate rains and thunderstorms will be experienced over Bicol and Mimaropa regions in Luzon, Visayas and Mindanao.

Partly cloudy to cloudy skies with isolated thunderstorms mostly in the afternoon or evening will prevail over Metro Manila and the rest of Luzon, it added.

Light to moderate winds blowing from the southeast to south will prevail over Northern and Central Luzon and coming from the southwest to south over the rest of the country.

The coastal waters throughout the archipelago will be slight to moderate.

Meanwhile, Malano said monsoon breaks or period of no rain for a few weeks is expected during the rainy season. (Sunnex)