Manila, Jan. 24 -- nd of a frontal system will bring cloudy skies with scattered rain showers and thunderstorms in the eastern section of Northern Luzon, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said on Sunday.

In its 5 a.m. weather bulletin, PAGASA said Ilocos Region, Cordillera Administrative Region, and Cagayan Valley will have cloudy skies with scattered rain showers and thunderstorms due to the frontal system.

The weather bureau warned residents in these areas of possible flash floods or landslides due to moderate to heavy rains.

Meanwhile, Metro Manila and the rest of the country will experience partly cloudy to cloudy skies with isolated rain showers due to localized thunderstorms....