Unnamed 1998 South Indian Ocean Tropical Cyclone
● Data reliability: ReliableWeather satellites monitored it throughout, so its track and intensity are relatively accurate (Atlantic and E. Pacific since 1966, other basins since 1980).
未命名 at 1998-02-15 14:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Moderate Tropical Storm, max wind 约 23.1 m/s (1 分钟平均) , minimum central pressure 997 hPa, at 1998-02-19 08:00:00前后结束, total 记录 16 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1998-02-15 14:00 | -19.3°S, 70.1°E | Tropical Disturbance | 7.7 | - |
| 1998-02-15 20:00 | -19.5°S, 68.8°E | Tropical Disturbance | 10.3 | - |
| 1998-02-16 02:00 | -19.9°S, 67.6°E | Tropical Disturbance | 10.3 | - |
| 1998-02-16 08:00 | -20.6°S, 66.5°E | Tropical Disturbance | 12.9 | - |
| 1998-02-16 14:00 | -21.4°S, 65.1°E | Tropical Disturbance | 12.9 | 1002 |
| 1998-02-16 20:00 | -22.1°S, 64.1°E | Tropical Depression | 18 | 998 |
| 1998-02-17 02:00 | -23.0°S, 63.2°E | Tropical Depression | 18 | 997 |
| 1998-02-17 08:00 | -23.8°S, 62.4°E | Tropical Depression | 18 | 997 |
| 1998-02-17 14:00 | -24.9°S, 62.1°E | Tropical Depression | 18 | 997 |
| 1998-02-17 20:00 | -26.2°S, 61.9°E | Tropical Depression | 18 | 997 |
| 1998-02-18 02:00 | -27.4°S, 62.7°E | Tropical Depression | 18 | 997 |
| 1998-02-18 08:00 | -28.3°S, 63.8°E | Moderate Tropical Storm | 23.1 | 998 |
| 1998-02-18 14:00 | -29.1°S, 65.1°E | Moderate Tropical Storm | 23.1 | 1000 |
| 1998-02-18 20:00 | -29.7°S, 66.4°E | Moderate Tropical Storm | 23.1 | 1002 |
| 1998-02-19 02:00 | -30.1°S, 68.1°E | Extratropical cyclone | 20.6 | - |
| 1998-02-19 08:00 | -30.7°S, 70.4°E | Extratropical cyclone | - | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1998046S19070 / SH241998. This basin has no official Chinese translated 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, for reference only. Data notes · Incorrect translation?
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