Tropical Cyclone Althea
● 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.
Althea at 1971-12-20 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 2 Tropical Cyclone , max wind 约 33.4 m/s (1 分钟平均) , minimum central pressure 990 hPa, at 1971-12-30 20:00:00前后结束, total 记录 43 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1971-12-20 08:00 | -11.0°S, 159.0°E | Tropical Depression | 10.3 | - |
| 1971-12-20 20:00 | -12.0°S, 158.3°E | Tropical Depression | 7.7 | - |
| 1971-12-21 08:00 | -13.1°S, 157.5°E | Tropical Depression | 7.7 | - |
| 1971-12-21 20:00 | -14.5°S, 156.3°E | Tropical Depression | 10.3 | - |
| 1971-12-22 08:00 | -15.6°S, 154.8°E | Tropical Depression | 12.9 | - |
| 1971-12-22 20:00 | -16.8°S, 152.8°E | Tropical Depression | 15.4 | - |
| 1971-12-23 08:00 | -17.2°S, 150.5°E | Category 1 Tropical Cyclone | 20.6 | - |
| 1971-12-23 20:00 | -18.0°S, 148.5°E | Category 1 Tropical Cyclone | 23.1 | - |
| 1971-12-24 08:00 | -19.0°S, 146.3°E | Category 2 Tropical Cyclone | 33.4 | - |
| 1971-12-24 20:00 | -20.3°S, 144.9°E | Category 1 Tropical Cyclone | 23.1 | - |
| 1971-12-25 08:00 | -20.7°S, 143.0°E | Tropical Depression | 18 | - |
| 1971-12-25 20:00 | -22.1°S, 142.7°E | Tropical Depression | 12.9 | - |
| 1971-12-26 08:00 | -24.2°S, 143.8°E | Tropical Depression | 10.3 | - |
| 1971-12-26 20:00 | -25.4°S, 146.3°E | Tropical Depression | 7.7 | - |
| 1971-12-27 08:00 | -25.7°S, 148.7°E | Tropical Depression | 15.4 | - |
| 1971-12-27 20:00 | -25.7°S, 152.8°E | Category 1 Tropical Cyclone | 20.6 | 992 |
| 1971-12-28 08:00 | -25.4°S, 154.7°E | Tropical Depression | 15.4 | - |
| 1971-12-28 20:00 | -25.1°S, 157.3°E | Tropical Depression | 12.9 | - |
| 1971-12-29 08:00 | -26.3°S, 161.0°E | Tropical Depression | 18 | 990 |
| 1971-12-29 20:00 | -29.9°S, 164.0°E | Tropical Depression | 12.9 | 990 |
| 1971-12-30 08:00 | -36.0°S, 164.9°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1971-12-30 20:00 | -38.6°S, 166.0°E | Category 1 Tropical Cyclone | 22.1 | 990 |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1971354S11159 / SH091972. This area has no official Chinese name, so the original English name is used. Categories follow the classifications of the local agency in the region, converted from 1-minute sustained wind speeds using the WMO factor, and are provided for reference only. Data notes · Incorrect translation?
Download