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 1998-07-20 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Tropical Depression, max wind 约 18 m/s (1 分钟平均) , at 1998-07-27 14:00:00前后结束, total 记录 30 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1998-07-20 08:00 | -4.8°S, 85.7°E | Tropical Disturbance | 12.9 | - |
| 1998-07-20 20:00 | -5.7°S, 84.6°E | Tropical Disturbance | 12.9 | - |
| 1998-07-21 08:00 | -6.5°S, 83.1°E | Tropical Disturbance | 12.9 | - |
| 1998-07-21 20:00 | -8.2°S, 81.8°E | Tropical Disturbance | 15.4 | - |
| 1998-07-22 08:00 | -9.6°S, 80.1°E | Tropical Depression | 18 | - |
| 1998-07-22 20:00 | -10.0°S, 78.5°E | Tropical Disturbance | 15.4 | - |
| 1998-07-23 08:00 | -10.6°S, 77.5°E | Tropical Disturbance | 15.4 | - |
| 1998-07-23 20:00 | -10.3°S, 76.6°E | Tropical Disturbance | 15.4 | - |
| 1998-07-24 08:00 | -9.7°S, 76.1°E | Tropical Disturbance | 15.4 | - |
| 1998-07-24 20:00 | -9.0°S, 76.4°E | Tropical Disturbance | 15.4 | - |
| 1998-07-25 08:00 | -8.5°S, 76.4°E | Tropical Disturbance | 15.4 | - |
| 1998-07-25 20:00 | -8.0°S, 75.5°E | Tropical Disturbance | 15.4 | - |
| 1998-07-26 08:00 | -7.4°S, 74.3°E | Tropical Disturbance | 12.9 | - |
| 1998-07-26 20:00 | -6.9°S, 73.2°E | Tropical Disturbance | 12.9 | - |
| 1998-07-27 08:00 | -7.0°S, 72.2°E | Tropical Disturbance | 12.9 | - |
| 1998-07-27 14:00 | -7.1°S, 71.7°E | Tropical Disturbance | 12.9 | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1998201S05086 / SH011999. No official Chinese name exists for this system; the English original name is used. Intensity is classified by the local agency in the region, converted from 1-minute sustained wind using the WMO factor, for reference only. Data notes · Incorrect translation?
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