Tropical Cyclone Ida
● Data reliability: Generally reliable——Aircraft entered typhoons for in situ measurements, but satellites were not yet widespread: tracks are generally accurate, while intensities may be biased, with weaker cyclones potentially going unrecorded from 1950 until the advent of satellite coverage.
Ida at 1971-02-15 14:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 1 Tropical Cyclone , max wind 约 23.1 m/s (1 分钟平均) , minimum central pressure 990 hPa, at 1971-02-23 08:00:00前后结束, total 记录 32 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1971-02-15 14:00 | -16.9°S, 157.7°E | Tropical Depression | 7.7 | - |
| 1971-02-16 02:00 | -16.4°S, 155.9°E | Tropical Depression | 7.7 | - |
| 1971-02-16 14:00 | -17.1°S, 156.3°E | Tropical Depression | 10.3 | - |
| 1971-02-17 02:00 | -17.2°S, 156.6°E | Tropical Depression | 10.3 | - |
| 1971-02-17 14:00 | -17.6°S, 157.8°E | Category 1 Tropical Cyclone | 23.1 | - |
| 1971-02-18 02:00 | -18.1°S, 158.8°E | Tropical Depression | 12.9 | - |
| 1971-02-18 14:00 | -20.0°S, 160.4°E | Tropical Depression | 12.9 | - |
| 1971-02-19 02:00 | -21.1°S, 161.3°E | Tropical Depression | 12.9 | - |
| 1971-02-19 14:00 | -22.0°S, 162.0°E | Tropical Depression | 12.9 | - |
| 1971-02-20 02:00 | -22.5°S, 162.4°E | Tropical Depression | 5.1 | - |
| 1971-02-20 14:00 | -23.1°S, 162.9°E | Tropical Depression | 12.9 | - |
| 1971-02-21 02:00 | -24.4°S, 164.3°E | Tropical Depression | 5.1 | - |
| 1971-02-21 14:00 | -25.3°S, 166.9°E | Tropical Depression | 10.3 | - |
| 1971-02-22 02:00 | -24.9°S, 172.4°E | Tropical Cyclone | - | - |
| 1971-02-22 14:00 | -25.7°S, 174.1°E | Tropical Cyclone | - | - |
| 1971-02-23 02:00 | -27.3°S, 172.8°E | Tropical Cyclone | - | - |
| 1971-02-23 08:00 | -27.9°S, 172.3°E | Tropical Depression | 16.5 | 997 |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1971046S17158 / SH181971. There is no official Chinese name for this system, so the original English name is used. Intensity is classified by the local agency for the region, based on 1-minute sustained winds converted using the WMO factor, and is provided for reference only. Data notes · Incorrect translation?
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