Typhoon Ivy Trail Analysis
Track and Movement Characteristics
The life cycle of Typhoon Ivy (197411) began over the Northwest Pacific. Its overall track steadily moved northwest, with no notable turns or looping. From the formation point (11.8°N, 139.5°E) to the dissipation point (24.5°N, 107.6°E), the system spanned about 32 degrees of longitude and nearly 13 degrees of latitude, maintaining a west-northwestward course throughout. In terms of movement speed, it traveled relatively quickly from July 17 to 18, then followed a more compact track during its rapid intensification phase. Notably, the typhoon made no landfall and remained at sea throughout its life cycle before weakening into a tropical depression near 24.5°N and ending its observations. Its track was typical of an oceanic typhoon, strongly influenced by the steering flow of the subtropical high, resulting in a smooth path with high predictability.
Intensity evolution and historical comparison
Ivy’s intensity evolved through three stages: rapid intensification, peak maintenance, and fluctuating weakening. Within 48 hours of formation, the system rapidly developed from a tropical depression into a severe typhoon, with central pressure plunging from 1002 hPa to 977 hPa. From 14:00 on July 19 to 02:00 on July 20, it intensified explosively, with maximum winds increasing from 55 m/s to 60 m/s and minimum central pressure reaching 945 hPa, making it a super typhoon. The peak phase was brief, after which environmental factors caused its intensity to fluctuate. From the afternoon of July 20 to the morning of July 21, it briefly weakened to typhoon intensity, with winds of 40 m/s and 35 m/s, but it intensified again into a severe typhoon early on July 22, with winds of 45 m/s and a central pressure of 967 hPa, demonstrating considerable structural resilience. It ultimately weakened and dissipated as it moved northward and increased in latitude.
Compared with earlier storms of the same name, Ivy’s peak intensity in 1974, with a central pressure of 945 hPa and maximum winds of 60 m/s, matched that of Ivy in 1977, also at 945 hPa. Both were stronger than the systems of the same name in 1971, at 978 hPa, and 1965, at 990 hPa. This indicates that the 1974 and 1977 storms were among the most intense in the Ivy naming series, with greater destructive potential and deeper low-pressure centers.
Typhoon Ivy routes
| Time | Position | Intensity | Wind · Pressure | Move toward |
|---|
| 07-17 14:00 | 11.8°N
139.5°E | Tropical Depression | 15 m/s
1002 hPa | - |
| 07-18 02:00 | 12.9°N
136.1°E | Severe Tropical Storm | 25 m/s
998 hPa | WNW |
| 07-18 14:00 | 13.7°N
132.6°E | Severe Tropical Storm | 30 m/s
991 hPa | WNW |
| 07-19 02:00 | 14.5°N
129.4°E | Severe Typhoon | 45 m/s
977 hPa | WNW |
| 07-19 14:00 | 14.8°N
126.5°E | Super Typhoon | 55 m/s
950 hPa | W |
| 07-20 02:00 | 15.2°N
123.6°E | Super Typhoon | 60 m/s
945 hPa | W |
| 07-20 14:00 | 16.1°N
121.1°E | Typhoon | 40 m/s
970 hPa | WNW |
| 07-21 02:00 | 17.5°N
117.9°E | Typhoon | 35 m/s
980 hPa | WNW |
| 07-21 14:00 | 18.5°N
115.5°E | Typhoon | 40 m/s
970 hPa | WNW |
| 07-22 02:00 | 19.4°N
113.7°E | Severe Typhoon | 45 m/s
967 hPa | WNW |
| 07-22 14:00 | 20.8°N
112.1°E | Severe Typhoon | 45 m/s
967 hPa | NW |
| 07-23 02:00 | 21.8°N
110.4°E | Tropical Storm | 20 m/s
980 hPa | WNW |
| 07-23 14:00 | 23.5°N
109.3°E | Tropical Depression | 15 m/s
994 hPa | NNW |
| 07-24 02:00 | 24.5°N
107.6°E | Tropical Depression | 9 m/s
998 hPa | WNW |
Sampled rows shown; all 27 track points are available on the interactive map or via the public API .
FAQ
Typhoon Ivy is the 1974 Typhoon.
The identifier 197411 for Typhoon Ivy is the historical number used by the CMA, meaning the 11th typhoon of 1974. Its international name was IVY. International standardized numbering for the Northwest Pacific did not begin until 1981; before then, individual agencies maintained separate numbering systems. The numbers assigned by the JMA in Japan, the Joint Typhoon Warning Center in the United States, and China’s meteorological authorities to the same typhoon may differ and cannot be compared directly.
Where did the track data for Typhoon Ivy come from?
Path. Data sources: China Meteorological Administration Tropical Cyclone Best Track Dataset (CMA-STI); wind speed refers to 2-min sustained wind speed. Track points at intermediate times are encrypted based on original operational positioning data, while wind speed and pressure are interpolated using best-track anchor points.
What is Typhoon Ivy?
Typhoon Ivy peak intensity is Super Typhoon, max wind 60m/s, minimum central pressure 945 hPa.
Is there a Typhoon IvyLandfall?
According to records, Typhoon Ivy is not in our coastal landfall.
Where can I view typhoon Ivy's live track map?
TyphoonSays (taifengshuo.com) provides typhoon Ivy's Track history map, multinational meteorological agency Forecast comparison, wind range with IntensityTrend, page address: https://taifengshuo.com/typhoon/197411.
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