SYNOPSIS: The Shear Line is currently affecting Southern Luzon and the Visayas, while the Northeast Monsoon influences the rest of Luzon. These systems are expected to bring varying weather conditions across the country.
Forecast Weather Conditions:
- CALABARZON, MIMAROPA, Bicol Region, Visayas, and Dinagat Islands: Residents in these areas should prepare for cloudy skies with scattered rains and isolated thunderstorms caused by the Shear Line. Moderate to heavy, and occasionally intense rains, may lead to flash floods or landslides.
- Zamboanga Peninsula, Basilan, Sulu, and Tawi-Tawi: Expect cloudy skies with scattered rains and thunderstorms due to the Trough of a Low-Pressure Area (LPA). Flash floods or landslides may occur in areas experiencing moderate to heavy rainfall.
- Metro Manila, Cagayan Valley, Cordillera Administrative Region, Aurora, Nueva Ecija, and Bulacan: The Northeast Monsoon will bring cloudy skies with rains to these regions. Residents should remain alert for possible flash floods or landslides due to moderate to heavy rainfall.
- The rest of Luzon: Anticipate partly cloudy to cloudy skies with isolated light rains caused by the Northeast Monsoon. No significant impact is expected.
- The rest of Mindanao: Areas will experience partly cloudy to cloudy skies with isolated rain showers or thunderstorms due to the Trough of LPA. Flash floods or landslides are possible during severe thunderstorms.
Forecast Wind and Coastal Water Conditions:
- Eastern section of Southern Luzon: Winds will be strong from the northeast, with rough coastal waters ranging from 2.8 to 4.0 meters.
- Visayas, the rest of Luzon, and northeastern Mindanao: Winds will be moderate to strong from east to northeast, with coastal waters ranging from moderate to rough (1.5 to 3.7 meters).
- The rest of Mindanao: Winds will be light to moderate from southeast to northeast, with slightly moderate coastal waters (0.6 to 2.5 meters).
Heavy Rainfall Outlook:
Today:
- Heavy to Intense (100-200 mm): Quezon, Camarines Norte, Oriental Mindoro, and Palawan.
- Moderate to Heavy (50-100 mm): Laguna, Occidental Mindoro, Marinduque, Romblon, Catanduanes, Camarines Sur, Albay, Sorsogon, Masbate, Antique, Aklan, Capiz, Iloilo, Northern Samar, Eastern Samar, and Samar.
Tomorrow:
- Heavy to Intense (100-200 mm): Camarines Norte, Camarines Sur, and Catanduanes.
- Moderate to Heavy (50-100 mm): Quezon, Albay, Sorsogon, Masbate, Oriental Mindoro, Marinduque, Romblon, Palawan, Aklan, Capiz, Northern Samar, Eastern Samar, and Samar.
Monday (December 23):
- Moderate to Heavy (50-100 mm): Quezon, Camarines Norte, Camarines Sur, Catanduanes, Albay, Sorsogon, Masbate, Oriental Mindoro, Marinduque, and Northern Samar.
Rainfall may increase in mountainous areas, and impacts may worsen due to antecedent rainfall.
General Flood Advisories:
- Region 5 (Bicol Region): GFA#11
- Region 7 (Central Visayas): GFA#10
- Region 8 (Eastern Visayas): GFA#10
- Region 9 (Zamboanga Peninsula): GFA#1
- Region 10 (Northern Mindanao): GFA#8 (Final)
- Region 13 (CARAGA): GFA#11 (Final)
- BARMM: GFA#9 (Final)
Residents in affected areas are advised to remain vigilant and follow updates from PAGASA and local disaster management authorities.