Unnamed North Indian Ocean cyclone of 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 1991-07-27 08:00:00 (BeijingTime) 在North Indian Ocean首次被记录, peak intensity 为Depressions, max wind 约 15.9 m/s (1 分钟平均) , minimum central pressure 984 hPa, at 1991-08-01 08:00:00前后结束, total 记录 21 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1991-07-27 08:00 | 20.5°N, 90.0°E | Tropical Cyclone | - | 990 |
| 1991-07-27 14:00 | 20.5°N, 89.0°E | Depressions | 13.4 | 992 |
| 1991-07-27 20:00 | 20.5°N, 88.8°E | Depressions | 13.4 | 988 |
| 1991-07-28 02:00 | 20.5°N, 88.5°E | Depressions | 13.4 | 992 |
| 1991-07-28 08:00 | 20.5°N, 88.2°E | Depressions | 13.4 | 988 |
| 1991-07-28 14:00 | 20.5°N, 87.8°E | Depressions | 13.4 | 987 |
| 1991-07-28 20:00 | 20.5°N, 87.5°E | Deep Depression | 15.9 | 984 |
| 1991-07-29 02:00 | 21.0°N, 87.0°E | Deep Depression | 15.9 | 986 |
| 1991-07-29 08:00 | 21.5°N, 86.5°E | Deep Depression | 15.9 | 986 |
| 1991-07-29 14:00 | 21.5°N, 84.2°E | Deep Depression | 15.9 | 990 |
| 1991-07-29 20:00 | 22.0°N, 82.0°E | Deep Depression | 15.9 | 988 |
| 1991-07-30 02:00 | 22.2°N, 81.0°E | Deep Depression | 15.9 | 990 |
| 1991-07-30 08:00 | 22.5°N, 80.0°E | Deep Depression | 15.9 | 988 |
| 1991-07-30 14:00 | 22.7°N, 79.0°E | Deep Depression | 15.9 | 992 |
| 1991-07-30 20:00 | 23.0°N, 78.0°E | Deep Depression | 15.9 | 990 |
| 1991-07-31 02:00 | 24.0°N, 77.5°E | Deep Depression | 15.9 | 992 |
| 1991-07-31 08:00 | 24.5°N, 77.0°E | Depressions | 13.4 | 990 |
| 1991-07-31 14:00 | 24.5°N, 76.5°E | Depressions | 13.4 | 992 |
| 1991-07-31 20:00 | 25.2°N, 76.3°E | Depressions | 13.4 | 990 |
| 1991-08-01 02:00 | 26.0°N, 76.7°E | Depressions | 13.4 | 992 |
| 1991-08-01 08:00 | 27.0°N, 77.0°E | Depressions | 8.2 | 994 |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1991208N20090. No official Chinese name is available for this system, so the original English designation is used. Intensity categories follow the classifications of the local agency in the relevant sea area, converted from 1-minute sustained winds using WMO factors, and are for reference only. Data notes · Incorrect translation?
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