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Manila Bulletin devider Philippines devider National devider Shear line, 'amihan' to bring rains over Luzon, Visayas; no LPA monitored — PAGASA

Shear line, 'amihan' to bring rains over Luzon, Visayas; no LPA monitored — PAGASA

Published Dec 12, 2025 10:54 am  |  Updated Dec 12, 2025 01:22 pm
PAGASA said the shear line and “amihan” will dampen Luzon and the Visayas on December 12, 2025. (Manila Bulletin / file)
PAGASA said the shear line and “amihan” will dampen Luzon and the Visayas on December 12, 2025. (Manila Bulletin / file)
The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) on Friday, December 12, said that although no low-pressure area (LPA) is being monitored within the Philippine Area of Responsibility (PAR), several weather systems continue to affect the country, bringing rains over parts of Luzon and the Visayas.
No LPA in sight, but the shear line and northeast monsoon will bring rains and thunderstorms across Luzon and Visayas. (PAGASA)
No LPA in sight, but the shear line and northeast monsoon will bring rains and thunderstorms across Luzon and Visayas. (PAGASA)
Based on its latest weather bulletin, PAGASA said the shear line is affecting the eastern sections of Southern Luzon and the Visayas, while the northeast monsoon (amihan) continues to influence weather conditions over Northern and Central Luzon.
Areas affected by the shear line
PAGASA said the Bicol Region, Quezon, Northern Samar, and Eastern Samar will experience cloudy skies with scattered rains and isolated thunderstorms due to the shear line.
The state weather bureau warned that flash floods or landslides are possible, especially in areas that may receive moderate to, at times, heavy rainfall.
Amihan to bring rains over Northern Luzon
PAGASA said the “amihan” will bring cloudy skies with rain to Cagayan, Isabela, and Aurora.
These areas may also face risks of flooding and landslides due to moderate to occasionally heavy rains.
Meanwhile, the Ilocos Region, Cordillera Administrative Region (CAR), the rest of Cagayan Valley, and the rest of Central Luzon may expect partly cloudy to cloudy skies with isolated light rains, with PAGASA noting no significant impact from these conditions.
Metro Manila, CALABARZON, and the rest of the country
PAGASA said Metro Manila and the rest of CALABARZON will also experience partly cloudy to cloudy skies with isolated rainshowers or thunderstorms due to the shear line.
Severe thunderstorms may lead to possible flash floods or landslides, the agency added.
Meanwhile, the rest of the country will have similar conditions—partly cloudy to cloudy skies with isolated rainshowers or thunderstorms—driven by easterlies, with localized severe storms still posing risks of flooding and landslides.
PAGASA reminded the public to stay informed by monitoring its official weather updates, especially residents in flood- and landslide-prone areas.

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PAGASA PAGASA weather bulletin weather forecast Philippines Philippines weather December 12 2025 amihan shearline LPA
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