26/09/2025
TROPICAL CYCLONE BULLETIN NR. 17
Severe Tropical Storm (BUALOI)
Issued at 11:00 AM, 26 September 2025
Valid for broadcast until the next bulletin at 2:00 PM today.
OPONG HAS PASSED OVER SIBUYAN AND TABLAS ISLANDS IN ROMBLON AND IS NOW HEADING TOWARDS SOUTHERN PORTION OF MINDORO ISLAND.
• Location of Center (10:00 AM)
The center of Severe Tropical Storm OPONG was estimated based on all available data, including those from Daet Doppler Weather Radar over the coastal waters of Ferrol, Romblon (12.3°N, 121.9°E).
• Intensity
Maximum sustained winds of 110 km/h near the center, gustiness of up to 150 km/h, and central pressure of 985 hPa.
• Present Movement
Westward at 35 km/h
• Extent of Tropical Cyclone Winds
Strong to storm-force winds extend outwards up to 460 km from the center
TROPICAL CYCLONE WIND SIGNALS (TCWS) IN EFFECT
TCWS No.3
Wind threat:
Storm-force winds
Warning lead time: 18 hours
Range of wind speeds: 89 to 117 km/h (Beaufort 10 to 11)
Potential impacts of winds: Moderate to significant threat to life and property
Luzon:
Batangas, Marinduque, Romblon, Occidental Mindoro, and Oriental Mindoro
Visayas:
The northern portion of Aklan (Makato, Tangalan, Kalibo, New Washington, Ibajay, Lezo, Malay, Nabas, Numancia, Batan, Buruanga), and Caluya Island
TCWS No.2
Wind threat: Gale-force winds
Warning lead time: 24 hours
Range of wind speeds: 62 to 88 km/h (Beaufort 8 to 9)
Potential impacts of winds: Minor to moderate threat to life and property
Luzon:
The southern portion of Zambales (San Marcelino, Subic, Olongapo City, Castillejos, San Antonio, San Narciso, San Felipe), Bataan, the southern portion of Pampanga (Porac, Santa Rita, Guagua, Sasmuan, Macabebe, Masantol, Santo Tomas, San Simon, Minalin, City of San Fernando, Bacolor, Floridablanca, Apalit, Lubao), the southern portion of Bulacan (Obando, Paombong, Bocaue, City of San Jose del Monte, Bustos, City of Malolos, City of Meycauayan, Balagtas, Guiguinto, Pandi, Plaridel, Calumpit, Santa Maria, Hagonoy, Baliuag, Bulacan, Marilao, Pulilan), Metro Manila, Rizal, Cavite, Laguna, the southern portion of Quezon (Pitogo, Buenavista, Lucena City, Calauag, Pagbilao, Tiaong, Lopez, Catanauan, Mulanay, Guinayangan, Unisan, General Luna, Plaridel, Quezon, San Antonio, Alabat, Candelaria, Lucban, Sampaloc, Padre Burgos, Sariaya, City of Tayabas, Macalelon, Mauban, Dolores, Perez, Agdangan, Gumaca, Atimonan, Real, San Narciso, Tagkawayan, San Francisco, San Andres), the southern portion of Camarines Sur (Ocampo, Milaor, Nabua, Buhi, Baao, Cabusao, Bato, Camaligan, Pili, Sipocot, Pamplona, Ragay, Iriga City, San Fernando, Magarao, Minalabac, Del Gallego, Balatan, Libmanan, Naga City, Bombon, Bula, Canaman, Pasacao, Sagñay, Gainza, Lupi), Albay, Sorsogon, Masbate, Calamian Islands, and Cuyo Islands
Visayas:
The northern portion of Antique (Libertad, Pandan, Sebaste, Culasi, Valderrama, Barbaza, Tibiao, Patnongon, Laua-An, Bugasong), the rest of Aklan, Capiz, the northern portion of Iloilo (Estancia, Carles, Balasan, Batad, San Dionisio, Concepcion, Sara, Ajuy, Lemery, Barotac Viejo, San Rafael, San Enrique, City of Passi, Bingawan, Calinog, Lambunao, Dueñas), the northern portion of Negros Occidental (Manapla, City of Victorias, Enrique B. Magalona, Cadiz City, Sagay City), the extreme northern portion of Cebu (Daanbantayan, Medellin) including Bantayan Islands, the extreme western portion of Northern Samar (San Vicente, Capul, San Antonio), the extreme western portion of Samar (Tagapul-An)
TCWS No.1
Wind threat: Strong winds
Warning lead time: 36 hours
Range of wind speeds: 39 to 61 km/h (Beaufort 6 to 7)
Potential impacts of winds: Minimal to minor threat to life and property
Luzon:
Pangasinan, the rest of Zambales, Tarlac, Nueva Ecija, the southern portion of Aurora (Dingalan, Baler, Maria Aurora, San Luis), the rest of Pampanga, the rest of Bulacan, the rest of Quezon, Camarines Norte, the rest of Camarines Sur, Catanduanes, and the northern portion of Palawan (El Nido, Taytay, Dumaran, Araceli, San Vicente, Roxas)
Visayas:
The rest of Antique, the rest of Iloilo, Guimaras, the central portion of Negros Occidental (Calatrava, Salvador Benedicto, San Carlos City, Silay City, City of Talisay, Bacolod City, Bago City, Murcia, La Castellana, Valladolid, Pulupandan, La Carlota City, San Enrique, Pontevedra, Moises Padilla, Isabela, Hinigaran, City of Escalante, Toboso), the northern portion of Negros Oriental (Vallehermoso, Canlaon City, City of Guihulngan), the northern and central portion of Cebu (Asturias, Danao City, Compostela, Liloan, Consolacion, Cebu City, Balamban, Mandaue City, Lapu-Lapu City, Toledo City, City of Talisay, Pinamungahan, Minglanilla, City of Naga, San Fernando, Aloguinsan, Borbon, Carmen, Tuburan, City of Bogo, Tabogon, Catmon, Cordova, San Remigio, Sogod, Tabuelan, Barili, City of Carcar) including Camotes Islands, the northern portion of Bohol (Getafe, Talibon, Bien Unido, Ubay, Trinidad, Pres. Carlos P. Garcia, Mabini, San Miguel, Alicia, Pilar, Dagohoy, Danao, Buenavista, Inabanga, Clarin, Sagbayan), the rest of Northern Samar, the rest of Samar, Eastern Samar, Biliran, Leyte, and Southern Leyte
OTHER HAZARDS AFFECTING LAND AREAS
Heavy Rainfall Outlook
Refer to Weather Advisory No. 28 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.
• Moderate to significant impacts from storm-force winds are possible within any of the areas under Wind Signal No 3.
• Minor to moderate impacts from gale-force winds are possible within any of the areas under Wind Signal No. 2.
• Minimal to minor impacts from strong winds are possible within any of the areas under Wind Signal No. 1.
The Southwest Monsoon enhanced by OPONG, will bring strong to gale-force gusts over the following areas not under Wind Signal (especially in coastal and upland areas exposed to winds):
• Today: Ilocos Region, Cordillera Administrative Region, Cagayan Valley, Palawan, Visayas, Zamboanga del Norte, Misamis Occidental, Misamis Oriental, Camiguin, Caraga Region, and Davao Region.
• Tomorrow (27 September): Luzon and Western Visayas.
HAZARDS AFFECTING COASTAL WATERS
A Gale Warning is in effect over the seaboards of Southern Luzon and Visayas and the western seaboard of Central Luzon. Refer to Gale Warning No. 3 issued at 5:00 AM today.
24-Hour Sea Condition Outlook
Up to very rough, high, or very high over the following coastal waters:
• Up to 9.0 m: The seaboard of Romblon.
• Up to 6.0 m: The seaboards of Batangas, Quezon, Oriental Mindoro, and Occidental Mindoro including Lubang Island, Marinduque.
• Up to 4.5 m: The seaboards of Zambales, Bicol Region, Calamian Islands, Cuyo Islands, Western Visayas, Negros Occidental, Bantayan Islands, Camotes Islands, Northern Samar, Eastern Samar, Samar, Biliran; the western seaboards of Cavite and Bataan; the northern and western coasts of Leyte; the northern seaboard of Cebu.
• Sea travel is risky for all types or tonnage of vessels. All mariners must remain in port or, if underway, seek shelter or safe harbor as soon as possible until winds and waves subside.
Up to rough seas over the following coastal waters:
• Up to 4.0 m: The seaboards of Isabela, Aurora, Pampanga, Bulacan, and Metro Manila; the western seaboard of Pangasinan; the remaining seaboards of Bataan and Cavite.
• Up to 3.5 m: The seaboards of Batanes, Ilocos Norte, and Cagayan including Babuyan Islands; the eastern seaboards of Dinagat and Siargao Islands; the western seaboard of northern Palawan.
• Mariners of small seacrafts, including all types of motorbancas, are advised not to venture out to sea under these conditions, especially if inexperienced of operating ill-equipped vessels.
Up to moderate seas over the following coastal waters:
• Up to 2.5 m: The seaboards of Surigao del Norte, Davao del Sur, and Davao Oriental; the remaining seaboards of Luzon and Visayas.
• Mariners of motorbancas 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 moderate to high risk of life-threatening storm surge with peak heights reaching 1.0 to 3.0 m within 24 hours over the low-lying or exposed coastal localities of Bataan, Pampanga, Bulacan, Metro Manila, CALABARZON, Occidental Mindoro including Lubang Island, Oriental Mindoro, Marinduque, Romblon, Calamian Islands, Bicol Region, Northern Samar, Samar, Negros Occidental, Aklan, Antique, Capiz, and Iloilo. Refer to Storm Surge Warning No. 8 issued at 8:00 AM today for the details.
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.
• After making landfall over San Fernando, Romblon and Alcantara, Romblon at 8:10 AM and 9:20 AM today respectively, OPONG will continue moving west northwestward and may make landfall over the southern portion of Occidental Mindoro by noon or early afternoon today. It will emerge over the Mindoro Strait tonight and head towards the West Philippine Sea. On the track forecast, OPONG will exit our Philippine Area of Responsibility tomorrow (27 September) afternoon.
• OPONG will likely remain as a severe tropical storm until it emerges over the Mindoro Strait. Re-intensification is highly likely as OPONG moves over the West Philippine Sea.
Considering these developments, the public and disaster risk reduction and management offices concerned are advised to take all necessary measures to protect life and property. Persons living in areas identified to be highly or very highly susceptible to these hazards are advised to follow evacuation and other instructions from local officials. For heavy rainfall warnings, thunderstorm/rainfall advisories, and other severe weather information specific to your area, please monitor products issued by your local PAGASA Regional Services Division.
The next tropical cyclone bulletin will be issued at 2:00 PM today.
DOST-PAGASA
