1978 South Indian Ocean Unnamed Tropical Cyclone
● 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.
未命名 at 1978-12-20 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Severe Tropical Storm, max wind 约 28.3 m/s (1 分钟平均) , at 1978-12-26 08:00:00前后结束, total 记录 25 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1978-12-20 08:00 | -9.8°S, 87.5°E | Tropical Disturbance | 15.4 | - |
| 1978-12-20 20:00 | -10.2°S, 88.5°E | Tropical Depression | 18 | - |
| 1978-12-21 08:00 | -10.5°S, 89.3°E | Moderate Tropical Storm | 20.6 | - |
| 1978-12-21 20:00 | -11.0°S, 88.8°E | Moderate Tropical Storm | 25.7 | - |
| 1978-12-22 08:00 | -11.1°S, 88.0°E | Severe Tropical Storm | 28.3 | - |
| 1978-12-22 20:00 | -11.4°S, 86.9°E | Moderate Tropical Storm | 25.7 | - |
| 1978-12-23 08:00 | -11.3°S, 85.5°E | Moderate Tropical Storm | 20.6 | - |
| 1978-12-23 20:00 | -11.6°S, 83.5°E | Tropical Depression | 18 | - |
| 1978-12-24 08:00 | -12.0°S, 82.0°E | Tropical Disturbance | 15.4 | - |
| 1978-12-24 20:00 | -12.2°S, 80.1°E | Tropical Disturbance | 15.4 | - |
| 1978-12-25 08:00 | -12.5°S, 79.0°E | Tropical Disturbance | 15.4 | - |
| 1978-12-25 20:00 | -13.0°S, 76.0°E | Tropical Disturbance | 15.4 | - |
| 1978-12-26 08:00 | -13.5°S, 72.5°E | Tropical Disturbance | 12.9 | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1978354S10088 / SH031979. There is no official Chinese name for this system, so the original English name is used. Intensity is classified by the local agency in the affected basin, based on 1-minute sustained wind converted using the WMO factor, for reference only. Data notes · Incorrect translation?
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