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 1991-04-23 02:00:00 (BeijingTime) 在North Indian Ocean首次被记录, peak intensity 为Super Cyclonic Storm, max wind 约 72 m/s (1 分钟平均) , minimum central pressure 918 hPa, at 1991-05-01 02:00:00前后结束, total 记录 33 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1991-04-23 02:00 | 10.0°N, 91.2°E | Depressions | 10.3 | - |
| 1991-04-23 14:00 | 9.5°N, 90.8°E | Depressions | 10.3 | - |
| 1991-04-24 02:00 | 9.4°N, 90.1°E | Depressions | 12.9 | - |
| 1991-04-24 14:00 | 9.3°N, 89.3°E | Deep Depression | 15.4 | 1002 |
| 1991-04-25 02:00 | 10.1°N, 89.1°E | Deep Depression | 18 | 1002 |
| 1991-04-25 14:00 | 11.0°N, 88.5°E | The Cyclone Storm | 20.6 | 1000 |
| 1991-04-26 02:00 | 11.2°N, 87.9°E | The Cyclone Storm | 23.1 | 998 |
| 1991-04-26 14:00 | 11.3°N, 87.4°E | 强The Cyclone Storm | 25.7 | 991 |
| 1991-04-27 02:00 | 11.9°N, 87.2°E | 强The Cyclone Storm | 30.9 | 991 |
| 1991-04-27 14:00 | 13.4°N, 87.2°E | 特强The Cyclone Storm | 38.6 | 974 |
| 1991-04-28 02:00 | 14.5°N, 87.2°E | 特强The Cyclone Storm | 43.7 | 974 |
| 1991-04-28 14:00 | 15.8°N, 87.9°E | 极强The Cyclone Storm | 48.9 | 952 |
| 1991-04-29 02:00 | 17.4°N, 88.7°E | 极强The Cyclone Storm | 56.6 | 934 |
| 1991-04-29 14:00 | 19.7°N, 90.0°E | Super Cyclonic Storm | 66.9 | 922 |
| 1991-04-30 02:00 | 22.0°N, 91.6°E | Super Cyclonic Storm | 69.4 | 920 |
| 1991-04-30 14:00 | 24.5°N, 94.7°E | 特强The Cyclone Storm | 43.7 | 996 |
| 1991-05-01 02:00 | 25.7°N, 99.7°E | The Cyclone Storm | 20.6 | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1991113N10091 / IO021991. This system has no official Chinese name and is displayed under its original English name. Intensity is classified by the local agency in the relevant sea area, converted from 1-minute sustained wind using the WMO factor, for reference only. Data notes · Incorrect translation?
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