Seasonal phenomenon · annual

Tropical Cyclones — Aviation Impact

Phenomenon: annual seasonal · Sources: NOAA NHC · JMA · IBTrACS · FAA · Reuters · Euronews · NBC News

TL;DR

Tropical cyclones — known regionally as hurricanes (Atlantic, Eastern Pacific), typhoons (Western Pacific), and cyclones (South Pacific, Indian Ocean) — are the single most predictable major disruptor of commercial aviation. Airport closure thresholds typically begin near sustained winds of 50–60 kt, with full ground stops above 70 kt. Recent high-impact events include Typhoon Bebinca (September 2024) closing both Shanghai Pudong (ZSPD) and Hongqiao (ZSSS) with all flights cancelled, and Super Typhoon Ragasa (September 2025) triggering more than 700 flight cancellations across southern China, Hong Kong, and the Philippines. The Atlantic hurricane basin (June–November), Western Pacific typhoon season (year-round, peak Jul–Oct), and Australian cyclone season (Nov–Apr) collectively account for the majority of weather-driven mass-cancellation events worldwide.

Atlantic season

Jun–Nov

W. Pacific peak

Jul–Oct

Closure wind threshold

~50–70 kt

Ragasa cancellations

700+

Recent significant events

15 SEPTEMBER 2024 — TYPHOON BEBINCA

Shanghai Pudong (ZSPD) and Hongqiao (ZSSS) full closure

Both Shanghai airports cancelled all flights after the China Meteorological Administration issued a red alert warning of sustained winds reaching 151 km/h (~82 kt). Bebinca made landfall as the strongest typhoon to strike Shanghai directly in roughly 75 years. Operations resumed progressively over the following 24 hours.
23 SEPTEMBER 2025 — SUPER TYPHOON RAGASA

700+ flight cancellations across southern China, Hong Kong, Philippines

Super Typhoon Ragasa triggered more than 700 flight cancellations and stranded tens of thousands of passengers as it approached the Pearl River Delta. Hong Kong (VHHH), Shenzhen (ZGSZ), Guangzhou Baiyun (ZGGG), and Macau (VMMC) all suspended or substantially reduced operations. Southern Chinese cities scaled back schools and businesses; northern provinces also saw domestic-flight suspensions and inter-island ferry shutdowns.
2024 ATLANTIC SEASON

Hurricane Helene and Milton — US Southeast coast impact

The 2024 Atlantic season produced major US-impacting hurricanes including Helene (September) and Milton (October). Florida, Georgia, and Carolina airports (Tampa KTPA, Orlando KMCO, Tallahassee KTLH, Asheville KAVL) saw extended closures, with major US carriers cancelling thousands of flights across multi-day windows.
PHILIPPINES & TAIWAN — 2024–2025

Recurring typhoon-driven evacuations and closures

The Philippines (PAGASA) and Taiwan (CWA) both experienced multiple typhoon-driven closure events, with Manila (RPLL), Cebu (RPVM), Taipei Taoyuan (RCTP), and Kaohsiung (RCKH) all seeing rolling closures. Both states maintain mature pre-storm operational templates.
2025 PACIFIC TYPHOON ACTIVITY

Above-average JMA-tracked activity

JMA (Japan Meteorological Agency) tracked above-average western-Pacific typhoon activity in 2025. Japan's main hubs (Tokyo Haneda RJTT, Tokyo Narita RJAA, Osaka Kansai RJBB, Fukuoka RJFF, Naha ROAH) all saw at least one full-day closure event during the peak season.

Operational impact

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Wind-threshold closures. Most airports begin reducing operations around sustained winds of 50 kt and close entirely above ~70 kt. Crosswind limits vary by aircraft type (typically 30–38 kt for major narrowbody types).
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Pre-emptive cancellation cycles. Airlines typically begin proactive cancellation 48–72 hours before forecast landfall, scaling progressively. By T-12h most affected airports are at full ground stop.
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Aircraft repositioning. Major US carriers routinely move aircraft out of forecast impact zones to airports further inland. Hangar capacity at vulnerable hubs (Miami KMIA, Tampa KTPA, San Juan TJSJ) is heavily oversubscribed during peak weeks.
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Rerouting versus overflying. Tropical cyclones at cruise altitude generally do not prevent overflight — flight crews route around convective tops but rarely cancel cruising flights for tropical systems alone.
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Post-storm recovery lag. Even after winds drop below operating limits, airports need 12–72 hours to clear debris, restore navigation aids, repair lighting, and resequence crews and aircraft. Hub-and-spoke networks see ripple cancellations for several days.
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No safety-critical recurring losses. Modern pre-storm planning means there are essentially no commercial-aviation fatalities directly attributed to tropical cyclones in recent decades — the threat is operational and financial, not safety-critical.

Most-exposed airport basins

Basin	Season	Key exposed hubs
Atlantic	Jun–Nov	KMIA, KMCO, KTPA, KIAH, KMSY, MDPC, TJSJ, MWCR
Eastern Pacific	May–Nov	MMUN (Cancún), MMPR (Puerto Vallarta), MMLO (Los Cabos)
Western Pacific	Year-round, peak Jul–Oct	RJTT, RJAA, ROAH, RCTP, VHHH, VMMC, ZSPD, ZSSS, ZGSZ, RPLL
North Indian	Apr–Dec, twin peaks	VECC (Kolkata), VOMM (Chennai), VABB (Mumbai), VTBD (Dhaka)
South Indian	Nov–Apr	FMEE (Réunion), FMMI (Mauritius)
South Pacific / Australian	Nov–Apr	YBBN (Brisbane), YBCS (Cairns), NZAA (less exposed)

Public forecast and tracking sources

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NOAA NHC (National Hurricane Center) — Atlantic and Eastern Pacific basin official US forecasts with 5-day track and intensity outlooks.
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JMA (Japan Meteorological Agency) — Western Pacific basin authoritative agency for typhoon naming and forecast.
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PAGASA (Philippines), HKO (Hong Kong), CMA (China), CWA (Taiwan) — regional warnings with local naming conventions for systems entering their respective areas of responsibility.
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IBTrACS (NOAA / NCEI) — canonical aggregated historical track database covering all basins and all reporting agencies.
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FAA Hurricane Season page — operational planning context for US air traffic and airport authorities.

How airlines and airports plan

Pre-season hangar contracts: major carriers contract shelter capacity at inland airports before the season starts.
Waiver policies: airlines publish flexible-rebooking waivers automatically when NHC/JMA issue a storm watch over a hub.
Crew positioning: pilots and cabin crew moved out of forecast impact zones 24–48 hours pre-landfall to enable rapid restart.
Airport infrastructure hardening: storm-rated terminal glazing, elevated electrical equipment, sealed jetbridges — significant investment at most exposed hubs.
FAA ATCSCC coordination: in the US, the Air Traffic Control System Command Center coordinates national flow management around landfall events.

Sources

NOAA National Hurricane Center — Atlantic / Eastern Pacific basin forecasts and post-season reports
JMA — Western Pacific best-track typhoon archive
IBTrACS (NOAA / NCEI) — aggregated global tropical cyclone track dataset
FAA — "Severe Weather and Natural Disaster Preparedness — Hurricane Season"
Aerotime — "Flights canceled in Shanghai as Typhoon Bebinca hits"
Euronews — Super Typhoon Ragasa flight-cancellation coverage
NBC News — China pre-Ragasa flight, school, business shutdown coverage
PBS NewsHour — Philippines and Taiwan typhoon-evacuation reporting

For airlines, OTAs, insurance underwriters

FlySafe integrates real-time NHC, JMA, and regional cyclone-warning feeds with airport-level closure indices. Useful for proactive schedule planning, traveller communication, and parametric weather-exposure tracking.

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