On September29, the Joint Typhoon Warning Center (JTWC) identified a low-pressure area approximately 241 nautical miles (446km) north-northeast of Yap in the Federated States of Micronesia. Satellite imagery indicated a weak area turning with disorganized convective activity, primarily along the system's western boundary.[1] The disturbance later entered the Philippine Area of Responsibility (PAR) and was namedPaolo by the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) around 08:00 PHT (00:00 UTC) on October1, with the Japan Meteorological Agency (JMA)[α] also starting advisories and classifying it as a tropical depression.[2][3] The JTWC also issued a Tropical Cyclone Formation Alert (TCFA) later that same day, citing tropical cyclone formation within the next 12 to 24 hours.[4] The agency later followed suit and designated Paolo as 27W, with fragmented banding and flaring convection around the low-level circulation center (LLCC).[5] Both agencies upgraded 27W into a tropical storm on the following day, with the JMA assigning it the international name Matmo as it tracked west-northwestward.[6] At 23:00 PHT (15:00 UTC), the PAGASA upgraded Matmo to a severe tropical storm, as satellite imagery showed improved organization, with deep convective banding wrapping into the LLCC, embedded in a favorable environment.[7][8] The JMA later followed suit and also upgraded the system to a severe tropical storm early on October3.[9]
Both the JTWC and the PAGASA subsequently upgraded Matmo to a minimal typhoon before it made landfall over Dinapigue, Isabela.[10][11][12][13] As the typhoon brushed over Northern Luzon, a satellite imagery revealed a well-defined deep convective banding pattern wrapping into the LLCC of Matmo, featuring an impressive central dense overcast (CDO) and extensive feeder bands extending well beyond the island's perimeter.[14] The PAGASA and the JTWC later downgraded Matmo to a mid-range tropical storm before it reemerged over the West Philippine Sea near Santa Cruz, Ilocos Sur at 17:00 PHT.[15][16] The JTWC re-upgraded Matmo to a typhoon at around 09:00 UTC on October4 as it showed improving convective banding around the LLCC and cooling cloud tops cooled over the previous six hours.[17] On the following day Matmo reached its peak intensity of a Category2-equivalent typhoon, with estimated one-minute sustained winds of 165km/h (89kn) and a minimum central pressure of 968hPa (28.6inHg).[18] It made landfall over Naozhou Island and Donghai Island near Mazhang District and Xuwen County on the Leizhou Peninsula on October5[19][20] at 14:50 CST (06:50 UTC).[21] It made another landfall over Fangchenggang,[22]Guangxi Province early on October6 at 01:10 CST[23][24] after it entered the Gulf of Tonkin.[25] The Hong Kong Observatory (HKO) last noted its position at 18:00 UTC on October6 as a low-pressure area to be 23°00′N105°12′E / 23.0°N 105.2°E / 23.0; 105.2,[26]122 nautical miles (226km) north-northwest from Hanoi.
Preparations
Philippines
Tropical Storm Matmo approaching Luzon on October2
TCWS No.2 was raised the following day for some portions of Apayao, Cagayan, and Ilocos Sur, as well as the entire provinces of Abra and Kalinga.[31] As Matmo strengthened into a severe tropical storm at 23:00 PHT (15:00 UTC), the agency upgraded several areas to TCWS No.3, including northern Aurora, Benguet, La Union, central and southern Isabela, Nueva Vizcaya, Quirino, and the entire provinces of Ifugao and Mountain Province.[32][33] At 11:00 PHT (03:00 UTC) on October3, the agency raised TCWS No.4 for extreme northern Aurora, the southern portions of Isabela, Abra, Ilocos Sur, the northern portions of Quirino, Nueva Vizcaya, La Union, and the entire provinces of Mountain Province and Ifugao.[12][34] The signal was later lowered when the PAGASA downgraded Matmo to a severe tropical storm at 17:00 PHT on October3[35] and lifted altogether the next day.[36]
Apart from wind signals, the PAGASA issued a heavy rainfall advisory at 11:00 PHT on October3, placing Bataan and Zambales under an Orange Rainfall Warning, indicating that flooding was threatening and residents should prepare to evacuate if necessary. A Yellow Rainfall Warning was also issued for Batangas, Cavite, and several towns in Quezon, signalling the possibility of flooding in flood-prone areas.[37] A storm surge warning was also in effect over parts of Luzon.[38][39] Classes were suspended in Isabela, Cagayan, Quirino and Nueva Vizcaya on October3.[40]
Hong Kong
The HKO began tracking the low-pressure area as early as September29,[41] upgrading it to a tropical depression by 23:00 HKT (15:00 UTC) on October1.[42] At 17:20 HKT (09:20 UTC) on October3, the HKO announced that Standby Signal No.1 would be issued at 19:40 HKT.[43] The signal was issued as scheduled,[44] setting a new record that the tropical cyclone warning signal was issued for the twelfth storm in a season, surpassing the 1974 record of eleven storms.[45] At 12:20 HKT (04:20 UTC) on October4, Strong Wind Signal No.3 was issued,[46] following an earlier announcement made at 09:40 HKT (01:40 UTC).[47] Later that day, at 17:45 HKT (09:45 UTC), the HKO upgraded Matmo to typhoon status.[48] The next day at 15:40 HKT, Strong Wind Signal No.3 was lowered to Standby Signal No.1.[49] Signal No.1 was subsequently cancelled at 22:20 HKT (14:20 UTC).[50].
Macau
The Meteorological and Geophysical Bureau[β] (SMG) issued the Signal No.1[yue] at 23:00 MST (15:00 UTC) on October3.[51][52][53] The 1974 record on the number of storms which required the issuance of warning signals was tied.[54] The signal was raised to Signal No.3 at 16:00 MST (08:00 UTC) on October4.[55][56] A blue storm surge warning was also issued, at 12:00 MST.[57] At 20:00 MST (12:00 UTC), the SMG upgraded Matmo to a typhoon.[58] They also announced at 23:00 MST (15:00 UTC) that Gale or Storm Southeast Signal No.8 would be hoisted between 02:00 to 04:00 MST on October5.[59] The signal was hoisted at 02:00 MST and lowered to Signal No.3 at 13:00 MST;[60][61] whereas the storm surge signal was cancelled at 11:00 MST.[62][63] The state of prevention as declared also ended at 13:00 MST as Signal No.8 was lowered.[64] When Signal No.8 was hoisted, ferry services with Hong Kong and traffic on the Hong Kong–Macau–Zhuhai Bridge were suspended.[65] All typhoon signals were cancelled by 21:00 MST (13:00 UTC).[66]
China
Around 347,000 people were evacuated in Hainan and Guangdong:[67] 150,000 in Guangdong;[68] another 197,000 in Hainan.[69]
Vietnam
In anticipation of Matmo's developments, the Haiphong City Civil Defense Command issued a directive on October2 to local Civil Defense Commands and related agencies to closely monitor official warnings, forecasts, and the storm's progress. Vessel captains and owners were instructed to stay informed of the storm's current position, projected track, and changing characteristics, taking precautionary measures and adjusting operations to ensure safety. Response forces and rescue equipment were placed on standby for emergency deployment.[70] The US embassy in Hanoi issued an alert regarding Matmo.[71] In Ho Chi Minh City, in southern Vietnam, the local department of agriculture and environment instructed local authorities and relevant agencies to closely monitor bulletins and forecasts of the storm's developments, prevent and respond to the storm's impact including heavy rain, thunderstorms, strong winds and flooding.[72]
Impact
Philippines
Flooding was reported in several parts of Luzon as Matmo brought heavy rain on October3.[37] A total of 21,340 people were evacuated in the province of Aurora.[73] A power transmission line between Santiago and Alicia was downed, affecting customers of ISELCO I in Isabela and IFELCO in Ifugao.[74] Flash flooding was also reported in Batangas, resulting in the evacuation of hundreds of families. About 55 families were evacuated in Ifugao after the gates of Magat Dam were opened.[75] A house was swept away by floodwaters in Santa Fe, Nueva Vizcaya.[76] The NDRRMC said that 313,822 were affected by the storm, while 8,380 others were displaced. One house was destroyed while 26 others were damaged. Six infrastructures were damaged, with up to 111 road sections and 36 bridges rendered impassable. Power outages occurred in 61 areas, while 17 seaports were shut down, resulting in at least 176 passengers and 39 vessels stranded.[77] One person drowned after attempting to cross a swollen river in Cordon, Isabela.[78]
Hong Kong
According to the Airport Authority, 27 flights were anticipated to be cancelled as of 08:30 HKT on October5, and 81 were expected to be delayed. The Ngong Ping 360 cable car system was suspended from service.[79]
Although the typhoon did not directly hit Hong Kong, its outer rainbands brought heavy rains and strong to gale-force winds to the territory. Winds recorded on Cheung Chau Beach reached 82km/h (51mph) (10-minute sustained).[citation needed] The highest wind warning issued in Hong Kong was Strong Wind Signal No.3, which remained in force for 24 hours.[80] However, the HKO had not upgraded it to Gale or Storm Signal No.8, even though sustained gale-force winds were recorded in multiple areas.[where?]
Macau
Minor flooding as a result of storm surge was reported in low-lying areas along Porto Interior in the morning on October5.[81]
China
The city of Zhanjiang, Guangdong imposed a shutdown on schools, businesses, transport and public services in the evening on October4. From the morning of October5, all highways were closed.[82] Damage in Zhanjiang was estimated at 11.11 billion yuan (US$1.56 billion).[83]
In Haikou and Wenchang, Hainan, schools, workplaces, ferry routes and scenic spots were closed. All trains on the island province were suspended on October5. All flights to and from the Haikou Meilan International Airport were cancelled from the evening on October4.[82]
On October5, at Bohe Port in Dianbai District, Maoming, Guangdong Province, strong winds brought by Matmo tore off an iron roof, causing it to fall to the ground. According to the Guangdong Provincial Meteorological Observatory, the center of the typhoon made landfall on the eastern coast of Xuwen County, Zhanjiang, Guangdong, at approximately 14:50 local time on October5. At the time of landfall, the maximum sustained wind speed near the center reached force 14 in the extended Beaufort scale (equivalent to 42m/s (150km/h; 94mph), classified as a strong typhoon), with a minimum central pressure of 965hPa (28.50inHg).[84] On October8, water level in Zuojiang River exceeded the warning level by 4.89 metres (16ft 1in), causing flooding in Longzhou.[85]
Matmo unleashed heavy rains, causing devastating flooding in many provinces and cities in northern Vietnam, including the capital Hanoi. Heavy floods were reported in Thái Nguyên,[94]Lạng Sơn,[95]Sơn La, Cao Bằng, Bắc Ninh and Bắc Giang. On October9, flood levels in Cầu River exceeded the historical level of 2024 during Typhoon Yagi. Flood levels in Bằng River in Cao Bằng also exceeded the historical level of 1989.[94] In Lạng Sơn province, the That Khe 1 hydropower dam burst, flooding the town of Thất Khê[vi; ceb].[96] In Bắc Giang, dykes of the Thương River were breached in the communes of Tiên Lục, Bố Hạ, Yên Thế and Việt Yên.[97] On October 9, the communes of Đa Phúc and Trung Giã of Hanoi were flooded due to overflowed dykes.[98]
As of October 10, Matmo killed 16, injured 10 and left two others missing, most of them were either swept away by floods or killed by landslides.[99] As of October 15, losses across the nation amounted to nearly 17 trillion đồng (US$677 million).[100]Thái Nguyên province was the hardest hit province with a loss of 12.2 trillion đồng (US$486 million).[101]
Thailand
By October7, the remnants of Matmo exacerbated heavy rainfall in Thailand.[102] Flooding in the country killed 22 people and affected 370,000 others across 19 provinces, particularly in Uttaradit and Phra Nakhon Si Ayutthaya.[103]
Typhoon Ketsana (2009) – a very large and deadly typhoon that caused flooding in Metro Manila causing the swelling of the Marikina River 16 years prior.
Typhoon Rammasun (2014) – a strong typhoon which also affected the Philippines and shortly crossed central and southern Luzon, causing widespread destruction.
Typhoon Mujigae (2015) – a stronger typhoon that took a similar track at a similar time of year 10 years before.
Typhoon Vamco (2020) – a stronger and deadlier typhoon that affected rainfall at the same area five years ago.
Typhoon Usagi (2024) – a intense typhoon which also affected the same areas as Matmo eleven months ago.
↑ "SMG - Clima em Macau". Direcção dos Serviços Meteorológicos e Geofísicos. October 3, 2025. Archived from the original on October 3, 2025. Retrieved October 3, 2025.
↑ "SMG - Clima em Macau". Direcção dos Serviços Meteorológicos e Geofísicos. October 4, 2025. Archived from the original on October 4, 2025. Retrieved October 4, 2025.
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