1977 Unnamed South Pacific Tropical 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 1977-02-20 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 1 Tropical Cyclone , max wind 约 22.1 m/s (1 分钟平均) , minimum central pressure 990 hPa, at 1977-02-24 20:00:00前后结束, total 记录 19 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1977-02-20 08:00 | -18.5°S, 166.5°W | Tropical Depression | 16.5 | 997 |
| 1977-02-20 14:00 | -18.6°S, 165.2°W | Tropical Cyclone | - | - |
| 1977-02-20 20:00 | -19.0°S, 164.0°W | Tropical Depression | 16.5 | 997 |
| 1977-02-21 02:00 | -19.9°S, 162.9°W | Tropical Cyclone | - | - |
| 1977-02-21 08:00 | -21.0°S, 162.0°W | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1977-02-21 14:00 | -22.2°S, 161.2°W | Tropical Cyclone | - | - |
| 1977-02-21 20:00 | -23.5°S, 160.5°W | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1977-02-22 02:00 | -25.2°S, 159.7°W | Tropical Cyclone | - | - |
| 1977-02-22 08:00 | -27.0°S, 159.0°W | Tropical Depression | 16.5 | 997 |
| 1977-02-22 14:00 | -28.0°S, 158.6°W | Tropical Cyclone | - | - |
| 1977-02-22 20:00 | -29.0°S, 158.0°W | Tropical Depression | 16.5 | 997 |
| 1977-02-23 02:00 | -30.7°S, 155.8°W | Tropical Cyclone | - | - |
| 1977-02-23 08:00 | -32.0°S, 153.0°W | Tropical Depression | 16.5 | 997 |
| 1977-02-23 14:00 | -33.0°S, 150.0°W | Tropical Cyclone | - | - |
| 1977-02-23 20:00 | -34.0°S, 147.0°W | Tropical Depression | 16.5 | 997 |
| 1977-02-24 02:00 | -35.1°S, 144.9°W | Tropical Cyclone | - | - |
| 1977-02-24 08:00 | -36.0°S, 143.0°W | Tropical Depression | 16.5 | 997 |
| 1977-02-24 14:00 | -36.4°S, 141.7°W | Tropical Cyclone | - | - |
| 1977-02-24 20:00 | -36.5°S, 140.5°W | Tropical Depression | 16.5 | 997 |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1977051S19194. No official Chinese name exists for this area, so the original English name is shown. Intensity category follows the local agency classification for that basin (converted from 1-min sustained wind using the WMO factor), for reference only. Data notes · Incorrect translation?
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