The Philippines' weather bureau has warned of flash floods and landslides across large parts of the country on Wednesday, 11 November, as three weather systems bring rain to Luzon, the Visayas and Mindanao. The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) issued its 24-hour public weather forecast at 4am, valid until 4am on Thursday, 12 November.

The northeast monsoon, known locally as amihan, is bringing cloudy skies and rain to the Cordillera Administrative Region, Cagayan, Isabela, Aurora, Quezon and Camarines Norte. PAGASA said the rain in those areas could reach moderate to at times heavy intensity.

Where the heaviest rain is expected

The easterlies, warm winds from the Pacific, are bringing scattered rain and thunderstorms to Eastern Visayas, Central Visayas, Caraga, the Davao Region and Northern Mindanao. A shear line is also bringing rain to Camarines Sur, Catanduanes, Albay and Sorsogon. PAGASA warned that moderate to heavy rain in the affected areas could trigger flash floods and landslides, particularly in flood-prone and mountainous communities.

Metro Manila and the rest of Luzon can expect isolated light rain, with no significant impacts expected, according to the bureau's advisory on Tuesday.

Typhoon Cempaka poses no direct threat

PAGASA is also monitoring Typhoon Cempaka, known locally as Samuel. At 3am on Wednesday it was located 2,440 kilometres east-northeast of extreme northern Luzon, well outside the Philippine Area of Responsibility, with maximum sustained winds of 140 kilometres per hour and gusts of up to 170 kilometres per hour. The bureau said the typhoon is not affecting the country and is not expected to make landfall in the Philippines.

Residents in affected areas have been advised to monitor official PAGASA updates and take precautions against flooding and landslides.