Manila, Dec. 15 -- Cloudy skies with scattered rains and thunderstorms are expected over the Bicol Region, Caraga, Davao Region, and the provinces of Northern Samar, Eastern Samar, and Southern Leyte due to the prevailing easterlies, the weather bureau reported on Monday.

Moderate to occasionally heavy rains may trigger possible flash floods or landslides in these areas, especially in low-lying and mountainous locations, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) reported in its 4 a.m. update.

Meanwhile, Apayao, Kalinga, Mountain Province, Ifugao, Cagayan, Isabela, Quirino, Nueva Vizcaya, Aurora, and Quezon will experience cloudy skies with rain as the northeast monsoon, or "amihan," contin...