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 1991-03-30 14:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Tropical Disturbance, max wind 约 15.4 m/s (1 分钟平均) , minimum central pressure 998 hPa, at 1991-04-03 14:00:00前后结束, total 记录 17 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1991-03-30 14:00 | -17.8°S, 52.3°E | Tropical Disturbance | 11.3 | 1005 |
| 1991-03-30 20:00 | -17.6°S, 52.1°E | Tropical Disturbance | 11.3 | 1005 |
| 1991-03-31 02:00 | -17.5°S, 51.9°E | Tropical Disturbance | 11.3 | 1005 |
| 1991-03-31 08:00 | -17.4°S, 51.6°E | Tropical Disturbance | 11.3 | 1005 |
| 1991-03-31 14:00 | -17.3°S, 51.3°E | Tropical Disturbance | 11.3 | 1005 |
| 1991-03-31 20:00 | -17.2°S, 51.1°E | Tropical Disturbance | 11.3 | 1003 |
| 1991-04-01 02:00 | -17.3°S, 50.9°E | Tropical Disturbance | 11.3 | 1003 |
| 1991-04-01 08:00 | -17.5°S, 50.9°E | Tropical Disturbance | 11.3 | 1003 |
| 1991-04-01 14:00 | -17.6°S, 51.1°E | Tropical Disturbance | 11.3 | 1003 |
| 1991-04-01 20:00 | -17.8°S, 51.3°E | Tropical Disturbance | 11.8 | 1002 |
| 1991-04-02 02:00 | -17.8°S, 51.0°E | Tropical Disturbance | 13.4 | 1000 |
| 1991-04-02 08:00 | -17.8°S, 50.4°E | Tropical Disturbance | 15.4 | 998 |
| 1991-04-02 14:00 | -17.7°S, 49.8°E | Tropical Disturbance | 15.4 | 998 |
| 1991-04-02 20:00 | -17.7°S, 49.3°E | Tropical Disturbance | 13.4 | 1002 |
| 1991-04-03 02:00 | -17.8°S, 48.8°E | Tropical Disturbance | - | - |
| 1991-04-03 08:00 | -17.9°S, 48.4°E | Tropical Disturbance | - | - |
| 1991-04-03 14:00 | -18.0°S, 47.9°E | Tropical Disturbance | - | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1991089S18052. This basin has no official Chinese name, so the original English name is shown. Intensity category follows the classification of the local agency for that basin (converted from 1-min sustained wind using the WMO factor), for reference only. Data notes · Incorrect translation?
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