Unnamed Tropical Cyclone in the South Indian Ocean in 1991
● 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 1991-09-10 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) , at 1991-09-13 14:00:00前后结束, total 记录 13 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1991-09-10 14:00 | -8.8°S, 79.7°E | Tropical Disturbance | 10.3 | - |
| 1991-09-10 20:00 | -9.2°S, 80.2°E | Tropical Disturbance | 12.9 | - |
| 1991-09-11 02:00 | -9.7°S, 80.5°E | Tropical Disturbance | 12.9 | - |
| 1991-09-11 08:00 | -10.1°S, 80.6°E | Tropical Disturbance | 15.4 | - |
| 1991-09-11 14:00 | -10.4°S, 80.5°E | Tropical Disturbance | 15.4 | - |
| 1991-09-11 20:00 | -10.7°S, 80.4°E | Tropical Depression | 18 | - |
| 1991-09-12 02:00 | -11.0°S, 80.4°E | Tropical Depression | 18 | - |
| 1991-09-12 08:00 | -11.2°S, 80.6°E | Moderate Tropical Storm | 20.6 | - |
| 1991-09-12 14:00 | -11.3°S, 81.0°E | Moderate Tropical Storm | 23.1 | - |
| 1991-09-12 20:00 | -11.0°S, 81.3°E | Moderate Tropical Storm | 20.6 | - |
| 1991-09-13 02:00 | -10.6°S, 81.5°E | Tropical Depression | 18 | - |
| 1991-09-13 08:00 | -10.1°S, 81.3°E | Tropical Disturbance | 15.4 | - |
| 1991-09-13 14:00 | -9.7°S, 81.1°E | Tropical Disturbance | 12.9 | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1991253S09080 / SH011992. There is no official Chinese name for this system, so its original English name is used. Intensity is classified by the relevant local agency in the basin, based on 1-minute sustained winds converted using the WMO factor, for reference only. Data notes · Incorrect translation?
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