A low pressure area (LPA) was spotted at 220 kilometers east northeast of Infanta, Quezon, or 215 km east of Baler, Aurora as of 3 p.m. Sunday.
Meanwhile, the southwest monsoon or habagat affects the rest of Southern Luzon, the Visayas, and Mindanao.
The Philippine Atmospheric, Geophysical and Astronomical Service Administration (PAGASA) warned of localized flooding mainly in low-lying urban centers or areas near the rivers.
Landslide is possible in highly susceptible areas, the weather bureau said.
In another development, recent heavy rains rendered roads around Mount Kanlaon in the Negros Island Region dangerous and barely passable to motorists, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported over the weekend.
According to PHIVOLCS and the Office of Civil Defense-Negros Island Region, major and secondary roads in the upland areas of Canlaon City and the towns of La Castellana and Isabela have been covered by thick, cement-like lahars.
Rivers, canals, and streams in these areas likewise choked with lahars and mud. Mount Kanlaon’s continual emissions of sulfur dioxide has added to difficulties for residents living within and around the volcano’s permanent danger zone.
The OCD urged surrounding communities and local government units to closely monitor weather conditions and prepare quick-response plans in case the rains worsened.
Overall weather outlook in the country is currently affected by the low-pressure area and the southwest monsoon.
Bago City’s mayor-elect Mayette Javellana said the OCD in Negros is helping local governments develop evacuation strategies and set up alternative learning centers ahead of the opening of classes on June 16.
Cloudy skies with scattered rains and thunderstorms are expected in Aurora, Quezon, Camarines Norte, Camarines Sur, Catanduanes, and Albay due to the LPA.
Occasional rains will prevail in Zambales, Bataan, Cavite, Batangas, Occidental Mindoro, Palawan and Antique because of the southwest monsoon.
The southwest monsoon will bring cloudy skies with scattered rains and thunderstorms Metro Manila, Zamboanga Peninsula, Pangasinan, and the rest of Visayas, Central Luzon, MIMAROPA, CALABARZON and Bicol Region, PAGASA said.
The rest of the Mindanao will have partly cloudy to cloudy skies with isolated rainshowers and thunderstorms.
The rest of the country will be partly cloudy to cloudy with isolated rainshowers and thunderstorms.
Editor’s Note: This is an updated article. Originally posted with the headline: “LPA, monsoon rains prevail this week—PAGASA”
