1977 Unnamed North Indian Ocean Cyclone
● Data reliability: Generally reliable——Aircraft entered typhoons for in situ measurements, but satellites were not yet widespread: tracks are generally accurate, while intensities may be biased, with weaker cyclones potentially going unrecorded from 1950 until the advent of satellite coverage.
未命名 at 1977-06-09 08:00:00 (BeijingTime) 在North Indian Ocean首次被记录, peak intensity 为强The Cyclone Storm, max wind 约 30.9 m/s (1 分钟平均) , at 1977-06-13 08:00:00前后结束, total 记录 17 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1977-06-09 08:00 | 15.8°N, 70.6°E | Tropical Cyclone | - | - |
| 1977-06-09 14:00 | 16.7°N, 70.4°E | Tropical Cyclone | - | - |
| 1977-06-09 20:00 | 17.3°N, 70.2°E | Tropical Cyclone | - | - |
| 1977-06-10 02:00 | 17.6°N, 69.9°E | Tropical Cyclone | - | - |
| 1977-06-10 08:00 | 17.9°N, 69.3°E | Tropical Cyclone | - | - |
| 1977-06-10 14:00 | 18.6°N, 68.2°E | Tropical Cyclone | - | - |
| 1977-06-10 20:00 | 19.1°N, 67.1°E | Tropical Cyclone | - | - |
| 1977-06-11 02:00 | 19.3°N, 66.4°E | Deep Depression | 18 | - |
| 1977-06-11 08:00 | 19.5°N, 65.7°E | The Cyclone Storm | 20.6 | - |
| 1977-06-11 14:00 | 19.7°N, 64.6°E | The Cyclone Storm | 23.1 | - |
| 1977-06-11 20:00 | 19.9°N, 63.5°E | 强The Cyclone Storm | 25.7 | - |
| 1977-06-12 02:00 | 20.1°N, 62.7°E | 强The Cyclone Storm | 28.3 | - |
| 1977-06-12 08:00 | 20.2°N, 62.0°E | 强The Cyclone Storm | 28.3 | - |
| 1977-06-12 14:00 | 20.3°N, 61.3°E | 强The Cyclone Storm | 30.9 | - |
| 1977-06-12 20:00 | 20.4°N, 60.6°E | 强The Cyclone Storm | 28.3 | - |
| 1977-06-13 02:00 | 20.5°N, 60.0°E | 强The Cyclone Storm | 28.3 | - |
| 1977-06-13 08:00 | 20.5°N, 59.4°E | 强The Cyclone Storm | 25.7 | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1977160N16071 / IO021977. No official Chinese name is available; the original English name is shown. Intensity grades follow the local agency classification for the basin, converted from 1-min sustained wind using the WMO factor, for reference only. Data notes · Incorrect translation?
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