MANILA, Dec. 22 -- Three weather systems will continue to bring rains in many parts of the country, the weather bureau said Monday.

In its 4 a.m. advisory, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said Isabela, Quirino, Nueva Vizcaya, Kalinga, Mountain Province, Ifugao, Aurora, Nueva Ecija, Bulacan, Rizal, and Quezon will have cloudy skies with scattered rains and isolated thunderstorms due to the shear line.

Easterlies will also bring scattered rains and thunderstorms over Visayas, Mimaropa, Bicol Region, Dinagat Islands, and Surigao del Norte.

Ilocos Norte, the rest of Cagayan Valley, and the rest of Cordillera Administrative Region will have rainy weather due to the northeast monsoon ...