Tropical Cyclone Lena
● 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.
Lena at 1971-03-13 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 2 Tropical Cyclone , max wind 约 28.3 m/s (1 分钟平均) , minimum central pressure 981 hPa, at 1971-03-23 20:00:00前后结束, total 记录 43 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1971-03-13 08:00 | -12.5°S, 154.8°E | Category 1 Tropical Cyclone | 23.1 | - |
| 1971-03-13 20:00 | -13.8°S, 155.9°E | Tropical Depression | 18 | - |
| 1971-03-14 08:00 | -15.9°S, 156.9°E | Tropical Depression | 18 | - |
| 1971-03-14 20:00 | -18.3°S, 156.6°E | Tropical Depression | 15.4 | - |
| 1971-03-15 08:00 | -20.1°S, 155.3°E | Category 1 Tropical Cyclone | 25.7 | - |
| 1971-03-15 20:00 | -21.8°S, 154.3°E | Category 1 Tropical Cyclone | 23.1 | - |
| 1971-03-16 08:00 | -23.0°S, 154.2°E | Category 2 Tropical Cyclone | 28.3 | - |
| 1971-03-16 20:00 | -24.0°S, 155.0°E | Category 1 Tropical Cyclone | 23.1 | - |
| 1971-03-17 08:00 | -23.6°S, 155.4°E | Category 1 Tropical Cyclone | 23.1 | - |
| 1971-03-17 20:00 | -22.8°S, 156.4°E | Tropical Depression | 18 | - |
| 1971-03-18 08:00 | -22.1°S, 158.0°E | Tropical Depression | 15.4 | - |
| 1971-03-18 20:00 | -21.5°S, 160.0°E | Tropical Depression | 15.4 | - |
| 1971-03-19 08:00 | -21.5°S, 161.7°E | Tropical Depression | 12.9 | 990 |
| 1971-03-19 20:00 | -22.2°S, 163.9°E | Tropical Depression | 10.3 | 990 |
| 1971-03-20 08:00 | -23.5°S, 164.9°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1971-03-20 20:00 | -25.2°S, 168.7°E | Tropical Depression | 16.5 | 997 |
| 1971-03-21 08:00 | -27.5°S, 171.8°E | Tropical Depression | 16.5 | 997 |
| 1971-03-21 20:00 | -30.4°S, 175.7°E | Tropical Depression | 16.5 | 997 |
| 1971-03-22 08:00 | -34.8°S, 179.7°W | Tropical Depression | 16.5 | 997 |
| 1971-03-22 20:00 | -37.3°S, 173.7°W | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1971-03-23 08:00 | -37.5°S, 167.7°W | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1971-03-23 20:00 | -39.1°S, 159.3°W | Category 1 Tropical Cyclone | 22.1 | 990 |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1971072S13155 / SH241971. This area has no official Chinese name, so the original English name is used. Intensity levels follow the classifications of the local agency in the basin (converted from 1-minute sustained wind using the WMO factor) and are provided for reference only. Data notes · Incorrect translation?
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