Tropical Cyclone Annie
● 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.
Annie at 1973-11-21 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Category 2 Tropical Cyclone , max wind 约 30.4 m/s (1 分钟平均) , minimum central pressure 981 hPa, at 1973-12-08 08:00:00前后结束, total 记录 69 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1973-11-21 08:00 | -9.0°S, 91.0°E | Tropical Depression | 11.3 | 1006 |
| 1973-11-22 02:00 | -10.4°S, 91.8°E | Tropical Depression | 11.3 | 1004 |
| 1973-11-22 20:00 | -11.1°S, 93.1°E | Tropical Depression | 13.9 | 1002 |
| 1973-11-23 14:00 | -11.1°S, 94.6°E | Tropical Depression | 13.9 | 1000 |
| 1973-11-24 08:00 | -11.5°S, 95.7°E | Tropical Depression | 13.9 | 1003 |
| 1973-11-25 02:00 | -11.9°S, 96.5°E | Tropical Depression | 16.5 | 996 |
| 1973-11-25 20:00 | -12.4°S, 97.1°E | Category 1 Tropical Cyclone | 24.7 | 994 |
| 1973-11-26 14:00 | -12.7°S, 97.9°E | Category 1 Tropical Cyclone | 22.1 | 994 |
| 1973-11-27 08:00 | -12.0°S, 99.1°E | Category 1 Tropical Cyclone | 22.1 | 994 |
| 1973-11-28 02:00 | -11.4°S, 100.6°E | Category 1 Tropical Cyclone | 22.1 | 994 |
| 1973-11-28 20:00 | -12.7°S, 102.0°E | Category 1 Tropical Cyclone | 24.7 | 990 |
| 1973-11-29 14:00 | -14.5°S, 102.1°E | Category 2 Tropical Cyclone | 27.8 | 984 |
| 1973-11-30 08:00 | -15.3°S, 102.5°E | Category 2 Tropical Cyclone | 30.4 | 981 |
| 1973-12-01 02:00 | -15.7°S, 103.9°E | Category 2 Tropical Cyclone | 30.4 | 986 |
| 1973-12-01 20:00 | -14.9°S, 103.7°E | Category 2 Tropical Cyclone | 27.8 | 992 |
| 1973-12-02 14:00 | -15.1°S, 102.3°E | Category 1 Tropical Cyclone | 22.1 | 992 |
| 1973-12-03 08:00 | -15.8°S, 100.2°E | Category 1 Tropical Cyclone | 22.1 | 994 |
| 1973-12-04 02:00 | -16.1°S, 98.3°E | Category 1 Tropical Cyclone | 22.1 | 994 |
| 1973-12-04 20:00 | -16.2°S, 95.0°E | Tropical Depression | 16.5 | 999 |
| 1973-12-05 14:00 | -16.2°S, 89.7°E | Tropical Disturbance | 13.9 | 1001 |
| 1973-12-06 08:00 | -16.7°S, 87.0°E | Tropical Disturbance | 13.9 | 1003 |
| 1973-12-07 02:00 | -17.4°S, 86.4°E | Tropical Disturbance | 13.9 | 1004 |
| 1973-12-07 20:00 | -18.5°S, 85.8°E | Tropical Disturbance | 11.3 | 1005 |
| 1973-12-08 08:00 | -19.0°S, 85.0°E | Tropical Disturbance | 11.3 | 1008 |
Data source: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1973325S09091. There is no official Chinese name for this basin, so the English name is used. Intensity categories follow the local agency scale for the basin, converted from 1-minute sustained winds using the WMO factor, and are for reference only. Data notes · Incorrect translation?
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