The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) has issued a weather forecast for January 1, 2025, highlighting the influence of three major weather systems: the Intertropical Convergence Zone (ITCZ), the Shear Line, and the Northeast Monsoon. These systems are expected to bring varied weather conditions across the country, with potential hazards such as flash floods and landslides in areas experiencing heavy rainfall.
Forecast Weather Conditions
- Visayas, Caraga, Davao Region, Palawan, Romblon, Catanduanes, Albay, Sorsogon, and Masbate
- Weather Condition: Cloudy skies with scattered rains and thunderstorms
- Cause: ITCZ
- Impacts: Moderate to heavy rains may lead to flash floods or landslides.
- Metro Manila, CALABARZON, Cagayan, Isabela, Quirino, Apayao, Aurora, Bulacan, Marinduque, Oriental Mindoro, Camarines Norte, and Camarines Sur
- Weather Condition: Cloudy skies with scattered rains and isolated thunderstorms
- Cause: Shear Line
- Impacts: Potential flash floods or landslides due to moderate to at times heavy rainfall.
- Batanes
- Weather Condition: Cloudy skies with rains
- Cause: Northeast Monsoon
- Impacts: Flash floods or landslides are possible due to moderate to at times heavy rains.
- Ilocos Region, Cordillera Administrative Region (except Apayao), and Nueva Vizcaya
- Weather Condition: Partly cloudy to cloudy skies with isolated light rains
- Cause: Northeast Monsoon
- Impacts: No significant effect is expected.
- The rest of Luzon and Mindanao
- Weather Condition: Partly cloudy to cloudy skies with isolated rain showers or thunderstorms
- Cause: Shear Line (Luzon) and ITCZ (Mindanao)
- Impacts: Severe thunderstorms may trigger localized flash floods or landslides.
Forecast Wind and Coastal Water Conditions
- Northern and Western Sections of Northern Luzon:
- Wind Speed: Moderate to Strong
- Wind Direction: Northeast
- Coastal Waters: Moderate to Rough (2.1 to 3.4 meters)
- Rest of the Country:
- Wind Speed: Light to Moderate
- Wind Direction: East to Northeast
- Coastal Waters: Slight to Moderate (0.6 to 2.5 meters)
Heavy Rainfall Outlook
- Today (January 1):
Moderate to Heavy (50-100 mm): Quezon, Camarines Norte, Camarines Sur, Catanduanes, Albay, Sorsogon, Northern Samar, Eastern Samar, Dinagat Islands, and Surigao del Norte - Tomorrow (January 2):
Moderate to Heavy (50-100 mm): Cagayan, Isabela, Apayao, Aurora, and Quezon - Friday (January 3):
Heavy to Intense (100-200 mm): Cagayan
Moderate to Heavy (50-100 mm): Isabela, Apayao, and Kalinga
Mountainous areas may experience higher rainfall levels, and cumulative rainfall could worsen impacts in certain regions.
General Flood Advisories (Issued @6 AM, January 1, 2025)
Regions with active advisories include Region 2 (Cagayan Valley), Region 4B (MIMAROPA), Region 5 (Bicol), Region 7 (Central Visayas), Region 8 (Eastern Visayas), Region 9 (Zamboanga Peninsula), Region 13 (Caraga), and BARMM. Residents are advised to remain vigilant and monitor updates.
Pagasa urges the public to exercise caution, particularly in flood- and landslide-prone areas, and to follow local authorities’ advisories for safety measures.