Why is Taiwan Called the "Typhoon Corridor"? Taiwan Typhoon Archives
Taiwan experiences an average of 3-4 typhoon landfalls or severe impacts annually. The Central Mountain Range both weakens typhoons and amplifies rainfall, with Typhoon Morakot's 3,000 mm precipitation serving as an extreme example.
The "Typhoon Corridor" Lives Up to Its Name
Taiwan sits at the crossroads of the main typhoon tracks in the Northwest Pacific: westward-moving typhoons collide with it, while recurving typhoons graze its edges. On average, 3-4 typhoons make landfall or severely impact Taiwan each year, with Hualien, Taitung, and Yilan being the most frequent landfall areas.
The Central Mountain Range: A Double-Edged Sword That Weakens Wind but Amplifies Rain
The Central Mountain Range, running vertically through Taiwan with an average elevation of over 3,000 meters, has a unique impact on typhoons:
- Weakening Intensity: After crossing the island, a typhoon's circulation structure is severely disrupted, typically causing its intensity to drop by 1-2 levels. This indirectly benefits Fujian Province.
- Extreme Rainfall Amplifier: Warm, moist air is forced upward by the mountains, doubling rainfall efficiency. In 2009, Typhoon Morakot brought cumulative rainfall exceeding 3,000 mm to the Alishan area—close to the local annual total. The resulting August 8th Floods claimed over 600 lives.
- Path Distortion: As typhoons approach Taiwan, they often exhibit erratic behaviors such as looping, sudden deflections, or "island-hopping" reorganization of their centers. This remains a world-class challenge for track forecasting.
Notable Typhoons Impacting Taiwan
| Typhoon | Year | Impact |
|---|---|---|
| Predecessor system of Typhoon Ellen (August 7th Floods) | 1959 | Catastrophic flooding in central and southern Taiwan |
| Herb | 1996 | Record-breaking single-day rainfall in Alishan |
| Morakot | 2009 | August 8th Floods; destruction of Xiaolin Village |
| Soudelor | 2015 | Island-wide power outage; closure of Suhua Highway |
| Krathon | 2024 | Rare landfall path in southwestern Taiwan |
Taiwan's Typhoon Preparedness Experience
Taiwan's decision-making process for typhoon holidays (suspension of work and classes), township-level rainfall warnings, and preventive evacuation protocols for mountainous indigenous communities are systems built on lessons learned from years of disasters. The zoning and monitoring of streams with high debris flow (mudslide) potential are particularly worthy of reference.
Data Query
The TyphoonSays Landfall Aggregation Page includes historical typhoons with landfall information involving "Taiwan." On the track map in the typhoon details page, you can clearly see the sudden intensity changes before and after a typhoon crosses the Central Mountain Range—the variation in color depth of track points on either side of the island provides intuitive evidence of terrain-induced weakening.