“OPONG”

Tropical Storm

Updated as of 1100HRS 24-Sep-2025


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“OPONG” FURTHER INTENSIFIES WHILE MOVING WEST SOUTHWESTWARD OVER THE PHILIPPINE SEA.

Location of eye/center : The center of Tropical Storm OPONG was estimated based on all available data at 815 km East of Northeastern Mindanao (09.7, 132.9).

Strength : Maximum winds of 85 kph near the center and gustiness of up to 105 kph.

Forecast movement : Forecast to move West Southwestward at 15 kph


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Forecast position

  • Sep 24, 2025 08:00 PM - 740 km East of Maasin City, Southern Leyte 

  • Sep 25, 2025 08:00 AM - 430 km East of Guiuan, Eastern Samar 

  • Sep 25, 2025 08:00 PM - 325 km East of Catarman, Northern Samar 

  • Sep 26, 2025 08:00 AM - Over the coastal waters of Laoang, Northern Samar 

  • Sep 26, 2025 08:00 PM - Over the coastal waters of Buenavista, Quezon 

  • Sep 27, 2025 08:00 AM - 245 km West of Indang, Cavite Sep 28, 2025 08:00 AM - 785 km West of Bacnotan, La Union (OUTSIDE PAR) 

  • Sep 29, 2025 08:00 AM - 1,245 km West of Extreme Northern Luzon or in the vicinity of Hainan, China (OUTSIDE PAR)


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HAZARDS AFFECTING LAND AREAS

Heavy Rainfall Outlook Refer to Weather Advisory No. 20 issued at 11:00 AM today for the heavy rainfall outlook due to Tropical Cyclone OPONG and the Southwest Monsoon. 

Severe Winds The wind signals warn the public of the general wind threat over an area due to the tropical cyclone. Local winds may be slightly stronger/enhanced in coastal and upland/mountainous areas exposed to winds. Winds are less strong in areas sheltered from the prevailing wind direction. Minimal to minor impacts from strong winds are possible within any of the areas under Wind Signal No. 1. The highest Wind Signal that may be hoisted throughout the passage of NANDO is Wind Signal No. 4. The Southwest Monsoon, both enhanced by NANDO and OPONG, will bring strong to gale-force gusts over the following areas (especially in coastal and upland areas exposed to winds): 

Today: Ilocos Region, Cordillera Administrative Region, Batanes, Cagayan including Babuyan Islands, Isabela, Zambales, Bataan, Tarlac, Pampanga, Nueva Ecija, Bulacan, Metro Manila, Cavite, Batangas, Quezon, MIMAROPA, Western Visayas, Negros Island Region, Zamboanga del Norte, Misamis Occidental, Misamis Oriental, Camiguin, Agusan del Norte, Surigao del Norte, Dinagat Islands, Sarangani, Davao del Sur, and Davao Oriental. 

Tomorrow (25 September): Ilocos Region, Batanes, Cagayan including Babuyan Islands, Isabela, Zambales, Bataan, Zamboanga del Norte, and most of MIMAROPA, Visayas, Northern Mindanao, Caraga, and Davao Region 

Friday (26 September): Batanes, Cagayan including Babuyan Islands, Ilocos Norte, Ilocos Sur, Zamboanga del Norte, and most of MIMAROPA, Visayas, Northern Mindanao, Caraga, and Davao Region.

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HAZARDS AFFECTING COASTAL WATERS

Gale Warning will likely be issued tomorrow (25 September).

24-Hour Sea Condition Outlook

  • Up to moderate to rough seas over the following coastal waters:

  • Up to 3.0 m: The eastern seaboard of Northern Samar; the northern and eastern seaboards of Eastern Samar.

  • Up to 2.5 m: The eastern seaboards of Catanduanes and Dinagat Islands; the northern seaboard of Northern Samar.

  • Mariners of motor bancas and similarly-sized vessels are advised to take precautionary measures while venturing out to sea and, if possible, avoid navigation under these conditions.

Coastal Inundation

There is a potential risk of coastal flooding due to storm surge in low-lying coastal areas of Southern Luzon and Eastern Visayas due to the passage of OPONG. Storm surge warning may be issued starting today or tomorrow (25 September). 

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TRACK AND INTENSITY OUTLOOK

It must be emphasized that heavy rainfall, severe winds, and storm surge may still be experienced in localities outside the landfall point and the forecast confidence cone. Refer to the hoisted Wind Signals (for direct wind threat of the tropical cyclone) and “Other Hazards affecting Land Areas” for more details. Furthermore, the track may still shift more to the north or to the south but within the limit of the forecast confidence cone. OPONG is forecast to begin moving west northwestward while approaching Eastern Visayas – Southern Luzon area. On the forecast track, OPONG may make landfall over Bicol Region by Friday (26 September) afternoon and cross Southern Luzon from Friday afternoon until Saturday (27 September) morning. It may exit the Philippine Area of Responsibility by Saturday evening or Sunday (28 September) morning. OPONG will continue to intensify while over the Philippine Sea and may reach typhoon category before making landfall over Bicol Region. It will then weaken as it crosses the archipelago, although it will likely remain as a typhoon or severe tropical storm during the passage. Re-intensification is highly likely once OPONG emerges over the West Philippine Sea.

Source: PAGASA