The tail-end of the frontal system that induced rains and triggered flooding in some parts of the country over the weekend was no longer directly affecting the country on Monday, the State weather bureau said.

The Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) said the easterlies and intertropical convergence zone (ITCZ) will be the prevailing weather systems that may bring scattered rain showers and isolated thunderstorms over Biliran, Leyte, Northern Samar, Samar, Eastern Samar, Southern Leyte, Cebu, Bohol, Negros Oriental, Siquijor, and Mindanao within 24 hours.

Meanwhile, light rains due to the northeast monsoon or "amihan" may not have a significant impact over Batanes, Cagayan, Isabela, Quirino, Nueva Vizcaya, Abra, Apayao, Benguet, Ifugao, Kalinga, Mountain Province, and Aurora.

Isolated light amihan rains may prevail over Ilocos Norte, Ilocos Sur, La Union, Pangasinan, Bulacan, Tarlac, Pampanga, Bataan, Zambales, and Nueva Ecica but are also not expected to bring significant impact over these areas.

Metro Manila and the rest of the country will have generally fair weather and partly cloudy to cloudy skies with isolated rain showers caused by localized thunderstorms. PAGASA warned against possible flooding or landslides during severe thunderstorms.

A gale warning was still in effect on Monday due to strong to gale force winds associated with the surge of the northeast monsoon or "amihan."

Rough to very rough seas may affect the northern and eastern seaboards of Northern Luzon and western seaboards of Northern and Southern Luzon.

As sea travel over these waters is still risky, fishing boats and other small sea vessels were advised to prevent from travelling out to sea, while larger sea vessels were asked to remain alert against big waves. 

PAGASA said zero or one tropical cyclone may enter or form inside the Philippine area of responsibility this month due to the prevalence of La Niña.