Typhoon Amy trajectory analysis
Track and Movement Characteristics
Typhoon Amy (197104) 的生命史始 at Northwest Pacific低纬度海域, 整体路径呈现典型的“NW—NE”抛物线型Moving特征. formed初期 (4月29日至30日) , 系统在6.4°N至7.2°N之间缓慢 toward WNW, 经度从155.6°EW移至152.7°E, 显示其受低层引导气流影响显著. Go to 5月1日后, 随着Intensity迅速增强, Moving速度加快, 路径稳定指 toward NW direction, 直至5月4日到达最W端约142°E附近.
值得注意的是, 该系统在5月4日20:00前后出现明显的转 toward 迹象. 此前路径经度持续W进或维持, 此后经度开始 toward E回调 (从142.6°E逐渐移至155.9°E) , 纬度则持续 toward N推进. 这一转 toward 过程发生在16.2°N至18.4°N之间, 表明副热带高压脊线可能在此时发生断裂或E退, 导致引导气流由E转为S及SW气流, 推动Typhoon toward NE direction加速移出. 整个生命周期内, 该Typhoon 未Landfall任何land, 全程在洋面上活动.
Intensity evolution and historical comparison
Amy's intensity evolution was marked by explosive strengthening and prolonged peak intensity. From a severe tropical storm on April 30 (25 m/s, 993 hPa) to a super typhoon at 20:00 on May 1 (65 m/s, 940 hPa), it crossed two intensity categories in less than 36 hours. At 08:00 on May 2, central pressure plunged to 899 hPa. From 20:00 on May 2 until 20:00 on May 4, maximum winds remained at the peak of 70 m/s, while minimum pressure fluctuated between 895 and 915 hPa, indicating exceptional structural stability. From May 5, the system weakened as it moved northward beyond 18.4°N, eventually weakening to a tropical depression at 20:00 on May 7 at 33.1°N.
Compared with previous storms of the same name, Amy in 1971 had exceptionally strong intensity. Its minimum pressure of 895 hPa was far lower than those of Amy in 1991 (930 hPa), 1994 (985 hPa), 1977 (985 hPa), and 1974 (988 hPa). Among the same-name samples provided, only Amy in 1991 and 1971 reached super typhoon status, but Amy's peak wind speed of 70 m/s and exceptionally low pressure in 1971 exceeded the values recorded in the other years, making it the strongest storm in this dataset.
Typhoon Amy routes
| Time | Position | Intensity | Wind · Pressure | Move toward |
|---|
| 04-29 08:00 | 6.4°N
155.6°E | Tropical Depression | 10 m/s
1005 hPa | - |
| 04-29 20:00 | 6.7°N
154.5°E | Tropical Depression | 15 m/s
1000 hPa | WNW |
| 04-30 08:00 | 6.6°N
153.6°E | Severe Tropical Storm | 25 m/s
995 hPa | WNW |
| 04-30 20:00 | 7.2°N
152.7°E | Severe Tropical Storm | 25 m/s
993 hPa | WNW |
| 05-01 08:00 | 7.6°N
151.3°E | Typhoon | 35 m/s
980 hPa | WNW |
| 05-01 20:00 | 8.7°N
149.4°E | Super Typhoon | 65 m/s
940 hPa | WNW |
| 05-02 08:00 | 9.9°N
147.2°E | Super Typhoon | 65 m/s
899 hPa | WNW |
| 05-02 20:00 | 11.5°N
145.3°E | Super Typhoon | 70 m/s
900 hPa | NW |
| 05-03 08:00 | 12.5°N
143.5°E | Super Typhoon | 70 m/s
919 hPa | WNW |
| 05-03 20:00 | 13.4°N
142.3°E | Super Typhoon | 70 m/s
902 hPa | NW |
| 05-04 08:00 | 14.4°N
142°E | Super Typhoon | 70 m/s
905 hPa | N |
| 05-04 20:00 | 16.2°N
142.6°E | Super Typhoon | 70 m/s
915 hPa | NNE |
| 05-05 08:00 | 18.4°N
143.7°E | Super Typhoon | 60 m/s
930 hPa | NNE |
| 05-05 20:00 | 20.4°N
144.6°E | Severe Typhoon | 50 m/s
950 hPa | NNE |
| 05-06 08:00 | 22.4°N
145.7°E | Typhoon | 40 m/s
958 hPa | NNE |
| 05-06 20:00 | 25°N
146.7°E | Typhoon | 35 m/s
968 hPa | NNE |
| 05-07 08:00 | 28.2°N
149.8°E | Severe Tropical Storm | 25 m/s
982 hPa | NE |
| 05-07 20:00 | 33.1°N
155.9°E | Tropical Depression | 15 m/s
995 hPa | NE |
Sampled rows shown; all 35 track points are available on the interactive map or via the public API .
FAQ
Typhoon Amy is the 1971 Typhoon.
Amy's identifier 197104 is the historical number continued by the CMA, meaning the fourth typhoon of 1971, while its international name was AMY. International numbering in the northwestern Pacific did not begin until 1981. Before then, agencies numbered storms independently, so the identifiers assigned by the JMA in Japan, the Joint Typhoon Warning Center in the United States, and Chinese meteorological agencies may differ for the same storm and cannot be directly compared.
Where did Typhoon Amy's track data come from?
Track data sources: China Meteorological Administration Tropical Cyclone Best Track Dataset (CMA-STI); wind speeds are 2-minute sustained wind speeds.
What is the highest level of Typhoon Amy?
Typhoon Amy peak intensity is Super Typhoon, max wind 70m/s, minimum central pressure 895 hPa.
Typhoon AmyLandfall?
According to records, Typhoon Amy is not in our coastal landfall.
Where can I view typhoon Amy's live track map?
TyphoonSays (taifengshuo.com) provides typhoon Amy's Track history map, multinational meteorological agency Forecast comparison, wind range with IntensityTrend, page address: https://taifengshuo.com/typhoon/197104.
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