1991South Indian Ocean未命名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 1991-11-20 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 991 hPa, at 1991-11-29 08:00:00前后结束, total 记录 36 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1991-11-20 14:00 | -8.1°S, 73.7°E | Tropical Disturbance | 10.3 | - |
| 1991-11-21 02:00 | -8.6°S, 72.3°E | Tropical Disturbance | 10.3 | - |
| 1991-11-21 14:00 | -9.3°S, 71.2°E | Tropical Disturbance | 10.3 | - |
| 1991-11-22 02:00 | -10.2°S, 70.7°E | Tropical Disturbance | 12.9 | 1000 |
| 1991-11-22 14:00 | -10.9°S, 70.6°E | Tropical Disturbance | 12.9 | 997 |
| 1991-11-23 02:00 | -11.9°S, 70.7°E | Tropical Depression | 18 | 994 |
| 1991-11-23 14:00 | -13.2°S, 71.0°E | Tropical Depression | 18 | 991 |
| 1991-11-24 02:00 | -14.4°S, 71.7°E | Moderate Tropical Storm | 23.1 | 993 |
| 1991-11-24 14:00 | -15.5°S, 71.8°E | Moderate Tropical Storm | 23.1 | 997 |
| 1991-11-25 02:00 | -16.2°S, 70.8°E | Moderate Tropical Storm | 20.6 | 997 |
| 1991-11-25 14:00 | -16.2°S, 69.7°E | Moderate Tropical Storm | 20.6 | 997 |
| 1991-11-26 02:00 | -16.0°S, 68.3°E | Tropical Disturbance | 15.4 | 997 |
| 1991-11-26 14:00 | -15.8°S, 66.9°E | Tropical Disturbance | 12.9 | 1000 |
| 1991-11-27 02:00 | -17.2°S, 64.5°E | Tropical Disturbance | 13.4 | 1000 |
| 1991-11-27 14:00 | -17.2°S, 62.2°E | Tropical Disturbance | 11.3 | 1002 |
| 1991-11-28 02:00 | -17.0°S, 60.0°E | Tropical Disturbance | 9.3 | 1005 |
| 1991-11-28 14:00 | -17.0°S, 57.2°E | Tropical Disturbance | 9.3 | 1006 |
| 1991-11-29 02:00 | -17.6°S, 55.6°E | Tropical Disturbance | - | - |
| 1991-11-29 08:00 | -17.9°S, 54.9°E | Tropical Disturbance | - | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010); code 1991324S08074 / SH041992. There is no official Chinese name for this system, so the original English name is used. Intensity is classified by the local agency for the relevant sea area, based on 1-minute sustained wind converted using the WMO factor, for reference only. Data notes · Incorrect translation?
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