Manila, Feb. 15 -- Multiple weather systems are affecting large parts of the country, bringing cloudy skies and rains, particularly over Luzon, the weather bureau reported Sunday.

The shear line is bringing cloudy skies and scattered rains over parts of eastern Luzon, with the state weather bureau warning of possible flash floods and landslides in affected areas.

In its 4 a.m. bulletin, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said the shear line is affecting the eastern sections of Northern and Central Luzon, particularly Cagayan, Isabela, Aurora, Quezon, and Rizal, where moderate to at times heavy rains may occur.

"Possible flash floods or landslides due to moderate to at times heavy...