Tropical Cyclone Shirley
● 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.
Shirley at 1975-02-03 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 1975-02-12 08:00:00前后结束, total 记录 37 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1975-02-03 08:00 | -11.0°S, 105.0°E | Tropical Depression | 11.3 | 1008 |
| 1975-02-03 20:00 | -11.5°S, 105.0°E | Tropical Depression | 11.3 | 1008 |
| 1975-02-04 08:00 | -12.0°S, 105.0°E | Tropical Depression | 11.3 | 1007 |
| 1975-02-04 20:00 | -12.5°S, 105.0°E | Tropical Depression | 13.9 | 1003 |
| 1975-02-05 08:00 | -13.0°S, 105.0°E | Tropical Depression | 16.5 | 999 |
| 1975-02-05 20:00 | -14.0°S, 104.6°E | Tropical Depression | 16.5 | 997 |
| 1975-02-06 08:00 | -15.0°S, 104.2°E | Category 1 Tropical Cyclone | 22.1 | 994 |
| 1975-02-06 20:00 | -16.0°S, 103.5°E | Category 2 Tropical Cyclone | 27.8 | 988 |
| 1975-02-07 08:00 | -17.3°S, 102.8°E | Category 2 Tropical Cyclone | 30.4 | 981 |
| 1975-02-07 20:00 | -17.9°S, 102.5°E | Category 2 Tropical Cyclone | 30.4 | 981 |
| 1975-02-08 08:00 | -18.5°S, 102.2°E | Category 2 Tropical Cyclone | 30.4 | 981 |
| 1975-02-08 20:00 | -19.1°S, 101.3°E | Category 2 Tropical Cyclone | 27.8 | 987 |
| 1975-02-09 08:00 | -19.8°S, 100.5°E | Category 1 Tropical Cyclone | 22.1 | 994 |
| 1975-02-09 20:00 | -20.5°S, 99.0°E | Tropical Depression | 16.5 | 999 |
| 1975-02-10 08:00 | -21.0°S, 97.2°E | Tropical Depression | 13.9 | 1003 |
| 1975-02-10 20:00 | -21.5°S, 95.8°E | Tropical Depression | 13.9 | 1005 |
| 1975-02-11 08:00 | -21.7°S, 94.1°E | Tropical Depression | 11.3 | 1007 |
| 1975-02-11 20:00 | -21.8°S, 93.1°E | Tropical Depression | 11.3 | 1008 |
| 1975-02-12 08:00 | -21.9°S, 92.1°E | Tropical Depression | 11.3 | 1008 |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010); code 1975034S11105. This basin has no official Chinese name, so the original English name is used. Intensity categories follow the local agency classification 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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