Tropical Cyclone Cecily
● 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.
Cecily at 1973-12-11 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Category 3 tropical cyclone , max wind 约 38.6 m/s (1 分钟平均) , minimum central pressure 973 hPa, at 1973-12-19 08:00:00前后结束, total 记录 33 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1973-12-11 08:00 | -9.9°S, 100.1°E | Tropical Cyclone | - | - |
| 1973-12-11 20:00 | -10.3°S, 99.8°E | Tropical Depression | 13.9 | 1002 |
| 1973-12-12 08:00 | -10.6°S, 99.5°E | Tropical Cyclone | - | - |
| 1973-12-12 20:00 | -11.2°S, 99.5°E | Tropical Depression | 13.9 | 998 |
| 1973-12-13 08:00 | -11.6°S, 99.8°E | Tropical Cyclone | - | - |
| 1973-12-13 20:00 | -12.5°S, 99.0°E | Category 1 Tropical Cyclone | 24.7 | 988 |
| 1973-12-14 08:00 | -14.6°S, 97.0°E | Tropical Cyclone | - | - |
| 1973-12-14 20:00 | -16.1°S, 95.5°E | Category 2 Tropical Cyclone | 33.4 | 976 |
| 1973-12-15 08:00 | -17.7°S, 94.7°E | Tropical Cyclone | - | - |
| 1973-12-15 20:00 | -19.1°S, 94.0°E | Category 3 tropical cyclone | 36 | 980 |
| 1973-12-16 08:00 | -20.8°S, 93.7°E | Tropical Cyclone | - | - |
| 1973-12-16 20:00 | -22.6°S, 94.4°E | Category 2 Tropical Cyclone | 27.8 | 993 |
| 1973-12-17 08:00 | -24.4°S, 95.3°E | Tropical Cyclone | - | - |
| 1973-12-17 20:00 | -25.5°S, 95.5°E | Category 1 Tropical Cyclone | 22.1 | 999 |
| 1973-12-18 08:00 | -26.4°S, 95.5°E | Tropical Cyclone | - | - |
| 1973-12-18 20:00 | -28.0°S, 94.6°E | Tropical Depression | 13.9 | 1004 |
| 1973-12-19 08:00 | -28.8°S, 91.5°E | Tropical Cyclone | - | - |
Data source: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1973345S10100. This basin has no official Chinese name, so the original English name is used. Intensity categories follow the local agency’s scale in 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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