RDRRMC CALAABARZON EOC UPDATE
TROPICAL CYCLONE BULLETIN NR. 12
Severe Tropical Storm #OpongPH (BUALOI)
Issued at 8:00 PM, 25 September 2025
Valid for broadcast until the next bulletin at 11:00 PM today.
“OPONG” CONTINUES TO MOVE CLOSER TOWARDS EASTERN VISAYAS.
• Location of Center (7:00 PM)
The center of Severe Tropical Storm OPONG was estimated based on all available data including those from Guiuan Doppler Weather Radar at 150 km East of Borongan City, Eastern Samar (11.6°N, 126.8°E).
• Intensity
Maximum sustained winds of 110 km/h near the center, gustiness of up to 135 km/h, and central pressure of 980 hPa.
• Present Movement
West northwestward at 20 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:
Sorsogon, the southern portion of Albay (Manito, Legazpi City, Daraga, Camalig, Guinobatan, City of Ligao, Pio Duran, Jovellar, Libon, Oas), and Masbate
VISAYAS:
Northern Samar, the northern portion of Eastern Samar (San Policarpo, Arteche, Jipapad, Oras, Dolores, Maslog, Can-Avid, Taft), and the northern portion of Samar (Calbayog City, Matuguinao, San Jose de Buan, San Jorge, Gandara, Santa Margarita, Tagapul-An, Almagro, Santo Niño, Pagsanghan)
• 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:
Laguna, Batangas, the southern portion of Quezon (Pitogo, San Andres, Buenavista, Lucena City, San Francisco, 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, San Narciso, Tagkawayan), Camarines Norte, Camarines Sur, the rest of Albay, Catanduanes, Marinduque, Occidental Mindoro, Oriental Mindoro, Romblon, and Calamian Islands
VISAYAS:
The rest of Eastern Samar, the rest of Samar, Biliran, the northern portion of Leyte (Calubian, Leyte, Capoocan, Carigara, Barugo, Babatngon, San Miguel, Tacloban City, San Isidro, Tabango), the extreme northern portion of Cebu (Daanbantayan, Medellin) including Bantayan Islands, the northern portion of Aklan (Makato, Tangalan, Kalibo, New Washington, Ibajay, Malay, Nabas, Numancia, Batan, Buruanga), the northern portion of Capiz (Roxas City, Panay, Pilar, Sapi-An, Ivisan, Pontevedra, President Roxas), the northern portion of Iloilo (Estancia, Carles, Balasan, Batad), and Caluya Islands
• 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:
The central and southern portions of Isabela (Alicia, San Mateo, Aurora, Ramon, Naguilian, Dinapigue, San Guillermo, Luna, City of Cauayan, Echague, Angadanan, Benito Soliven, City of Santiago, Reina Mercedes, San Agustin, San Manuel, Cabatuan, Gamu, San Isidro, Cordon, Jones, Burgos, San Mariano, Palanan), Quirino, Nueva Vizcaya, Ifugao, the southwestern portion of Mountain Province (Bauko, Sabangan, Tadian), Benguet, the southern portion of Ilocos Sur (Sugpon, Alilem), La Union, Pangasinan, Aurora, Nueva Ecija, Tarlac, Zambales, Bataan, Pampanga, Bulacan, Metro Manila, Rizal, Cavite, the rest of Quezon, Cuyo Islands, and northern mainland Palawan (El Nido, Taytay, Dumaran, Araceli). The rest of Leyte, Southern Leyte, the northern portion of Bohol (Getafe, Talibon, Bien Unido, Ubay, Trinidad, Pres. Carlos P. Garcia, Mabini), the northern portion of Cebu (City of Bogo, Tabogon, San Remigio, Borbon, Sogod, Tabuelan, Catmon, Tuburan, Carmen, Danao City, Asturias, Compostela, Liloan, Consolacion, Balamban, Mandaue City, Cebu City, Lapu-Lapu City, Cordova, Toledo City) including Camotes Islands, the northern portion of Negros Occidental (City of Escalante, Toboso, Calatrava, Sagay City, Cadiz City, Manapla, City of Victorias, Enrique B. Magalona, Silay City, City of Talisay, Salvador Benedicto, San Carlos City, Bacolod City, Murcia), the central portion of Iloilo (San Dionisio, Sara, Concepcion, Ajuy, Lemery, Barotac Viejo, San Rafael, Banate, Anilao, San Enrique, City of Passi, Bingawan, Calinog, Dueñas, Dingle, Barotac Nuevo, Dumangas, Lambunao, Janiuay, Badiangan, Pototan, Mina, Zarraga, New Lucena, Cabatuan, Maasin), the rest of Capiz, the rest of Aklan, the northern portion of Antique (Libertad, Pandan, Sebaste, Culasi, Tibiao, Barbaza, Bugasong, Laua-An, Valderrama) Surigao del Norte and Dinagat Islands
VISAYAS:
The central and southern portions of Isabela (Alicia, San Mateo, Aurora, Ramon, Naguilian, Dinapigue, San Guillermo, Luna, City of Cauayan, Echague, Angadanan, Benito Soliven, City of Santiago, Reina Mercedes, San Agustin, San Manuel, Cabatuan, Gamu, San Isidro, Cordon, Jones, Burgos, San Mariano, Palanan), Quirino, Nueva Vizcaya, Ifugao, the southwestern portion of Mountain Province (Bauko, Sabangan, Tadian), Benguet, the southern portion of Ilocos Sur (Sugpon, Alilem), La Union, Pangasinan, Aurora, Nueva Ecija, Tarlac, Zambales, Bataan, Pampanga, Bulacan, Metro Manila, Rizal, Cavite, the rest of Quezon, Cuyo Islands, and northern mainland Palawan (El Nido, Taytay, Dumaran, Araceli). The rest of Leyte, Southern Leyte, the northern portion of Bohol (Getafe, Talibon, Bien Unido, Ubay, Trinidad, Pres. Carlos P. Garcia, Mabini), the northern portion of Cebu (City of Bogo, Tabogon, San Remigio, Borbon, Sogod, Tabuelan, Catmon, Tuburan, Carmen, Danao City, Asturias, Compostela, Liloan, Consolacion, Balamban, Mandaue City, Cebu City, Lapu-Lapu City, Cordova, Toledo City) including Camotes Islands, the northern portion of Negros Occidental (City of Escalante, Toboso, Calatrava, Sagay City, Cadiz City, Manapla, City of Victorias, Enrique B. Magalona, Silay City, City of Talisay, Salvador Benedicto, San Carlos City, Bacolod City, Murcia), the central portion of Iloilo (San Dionisio, Sara, Concepcion, Ajuy, Lemery, Barotac Viejo, San Rafael, Banate, Anilao, San Enrique, City of Passi, Bingawan, Calinog, Dueñas, Dingle, Barotac Nuevo, Dumangas, Lambunao, Janiuay, Badiangan, Pototan, Mina, Zarraga, New Lucena, Cabatuan, Maasin), the rest of Capiz, the rest of Aklan, the northern portion of Antique (Libertad, Pandan, Sebaste, Culasi, Tibiao, Barbaza, Bugasong, Laua-An, Valderrama) Surigao del Norte and Dinagat Islands
MINDANAO:
Surigao del Norte and Dinagat Islands
OTHER HAZARDS AFFECTING LAND AREAS
➣ Heavy Rainfall Outlook
Refer to Weather Advisory No. 25 issued at 5:00 PM today for the heavy rainfall outlook due to Tropical Cyclone OPONG and the Southwest Monsoon. Link: tinyurl.com/wxadvisory
➣ 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 highest Wind Signal that may be hoisted throughout the passage of OPONG is Wind Signal No. 4.
The Southwest Monsoon enhanced 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, Cagayan Valley, Palawan, Visayas, Zamboanga del Norte, Misamis Occidental, Misamis Oriental, Camiguin, Caraga Region, and Davao Region.
• Tomorrow (26 September): Ilocos Region, Cordillera Administrative Region, Cagayan Valley, Palawan, Visayas, Zamboanga del Norte, Misamis Occidental, Misamis Oriental, Camiguin, Caraga Region, and Davao Region.
• Saturday (27 September): Luzon and Western Visayas.
➣ HAZARDS AFFECTING COASTAL WATERS
A Gale Warning is in effect over the eastern and southern seaboards of Southern Luzon and the eastern seaboard of Visayas. Refer to Gale Warning No. 2 issued at 5:00 PM today. Link: tinyurl.com/gale-warning
➣ 24-Hour Sea Condition Outlook
Up to very rough, high, or very high over the following coastal waters:
• Up to 11.0 m: The seaboards of Catanduanes; the eastern seaboards of Albay and Sorsogon; the northern and eastern seaboards of Northern Samar and Eastern Samar.
• Up to 6.0 m: The northern and eastern seaboards of Camarines Norte and Camarines Sur.
• Up to 5.0 m: The seaboards of Quezon and Marinduque; the remaining seaboards of Bicol Region, Northern Samar, and Eastern Samar.
• Up to 4.5 m: The seaboards of Aurora, Batangas, Oriental Mindoro, Occidental Mindoro including Lubang Island, Romblon, Samar, and Biliran; the western seaboard of Zambales, Bataan, and Cavite; the northern seaboards of Aklan, Capiz, Iloilo, and Leyte.
• 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, Calamian Islands, Cuyo Islands, and Bucas Grande Island; the eastern seaboards of Dinagat and Siargao Islands.
• Up to 3.5 m: The eastern seaboards of Cagayan including Babuyan Islands, Pampanga, Bulacan, and Metro Manila; the remaining seaboards or Cavite, Dinagat Islands, and Siargao Island.
• 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 Palawan 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 high risk of life-threatening storm surge with peak heights exceeding 3.0 m within 36 hours over the low-lying or exposed coastal localities of Zambales, Bataan, Metro Manila, CALABARZON, Occidental Mindoro including Lubang Island, Oriental Mindoro, Marinduque, Romblon, Palawan, Bicol Region, Northern Samar, Eastern Samar, Samar, Biliran, Leyte, Cebu, Aklan, Antique, Capiz, Dinagat Islands, and Siargao Island. Refer to Storm Surge Warning No. 6 issued at 8:00 PM today for the details. Link: tinyurl.com/storm-surge-warning
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 make landfall over Northern Samar or the northern portion of Eastern Samar tomorrow (26 September) early morning before heading towards Bicol Region, where it is likely to make another landfall in the vicinity of Sorsogon tomorrow morning. Throughout tomorrow, OPONG will move generally west northwestward near or over Sibuyan Sea and traverse the mainland and/or island provinces of Bicol Region, southern CALABARZON, and northern MIMAROPA, before emerging over the West Philippine Sea on Saturday (27 September) early morning.
• OPONG may reach typhoon category before making landfall. 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.
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 11:00 PM today.
DOST-PAGASA
Website link: tinyurl.com/TCB-OpongPH
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