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Manila Bulletin devider Philippines devider National devider Four weather systems to bring rains over parts of the Philippines on November 30 — PAGASA

Four weather systems to bring rains over parts of the Philippines on November 30 — PAGASA

Published Nov 30, 2025 09:35 am
(MANILA BULLETIN / file photo)
(MANILA BULLETIN / file photo)
Cloudy skies with scattered rains are expected over parts of the country on Sunday, November 30, as the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) continues to monitor four weather systems.
In its latest weather forecast, PAGASA said a shear line, the northeast monsoon (amihan), the trough of Tropical Storm Koto (formerly “Verbena”), and localized thunderstorms continue to influence weather conditions across the country.
Shear line dampens Apayao, Cagayan
PAGASA said the shear line is currently affecting the eastern section of Northern Luzon, bringing cloudy skies with scattered rains and isolated thunderstorms over Apayao and Cagayan.
A shear line, according to PAGASA, forms when two air masses of different characteristics (usually the northeast monsoon or amihan and the easterlies) converge—creating a boundary that often results in cloudy skies, scattered rains, and thunderstorms.
Residents in these provinces are advised to stay vigilant, as flash floods and landslides are possible due to moderate to, at times, heavy rainfall.
TS Koto trough affects Kalayaan Islands
The Kalayaan Islands will continue to experience cloudy skies with scattered rains and thunderstorms due to the trough of Tropical Storm Koto, which remains outside the Philippine Area of Responsibility (PAR).
A trough, or elongated low-pressure area, often brings rain and thunderstorms.
PAGASA warned of possible flash floods or landslides during periods of heavy rain.
‘Amihan’ brings light rains over Batanes
Meanwhile, the northeast monsoon is affecting Extreme Northern Luzon, causing cloudy skies with light rains over Batanes.
The weather bureau said no significant impact is expected from the light monsoon rains.
Localized thunderstorms to affect Visayas, Mindanao
The Visayas, Mindanao, and the rest of Palawan will have partly cloudy to cloudy skies with isolated rainshowers or thunderstorms due to localized thunderstorms, which are considered short-lived, small-scale weather disturbances.
PAGASA cautioned residents about possible flash floods or landslides during severe thunderstorms.
Easterlies to bring isolated rains in Metro Manila, rest of Luzon
Metro Manila and the rest of Luzon may also experience partly cloudy to cloudy skies with isolated rainshowers or thunderstorms as easterlies continue to affect the region.
Easterlies are warm, humid winds from the Pacific Ocean.
PAGASA urged the public to remain alert for sudden downpours that may trigger localized flooding.
The public and local governments, especially in areas prone to flooding and landslides, were also urged to monitor weather updates.
PAGASA likewise reminded fisherfolk and operators of small seacraft in northern waters to check for gale warnings before venturing out.

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PAGASA PAGASA weather PAGASA weather update amihan easterlies shearline
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