Tropical Cyclone Robert
● 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.
Robert at 1977-04-16 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 3 tropical cyclone , max wind 约 41.2 m/s (1 分钟平均) , minimum central pressure 965 hPa, at 1977-04-23 20:00:00前后结束, total 记录 31 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1977-04-16 08:00 | -12.0°S, 158.0°W | Tropical Depression | 12.9 | - |
| 1977-04-16 20:00 | -12.1°S, 155.7°W | Tropical Depression | 18 | 990 |
| 1977-04-17 08:00 | -12.6°S, 155.2°W | Tropical Depression | 18 | 990 |
| 1977-04-17 20:00 | -13.0°S, 155.4°W | Tropical Depression | 18 | 990 |
| 1977-04-18 08:00 | -13.5°S, 156.1°W | Category 1 Tropical Cyclone | 20.6 | 990 |
| 1977-04-18 20:00 | -14.4°S, 157.0°W | Category 1 Tropical Cyclone | 20.6 | 990 |
| 1977-04-19 08:00 | -14.8°S, 157.4°W | Category 1 Tropical Cyclone | 20.6 | 990 |
| 1977-04-19 20:00 | -15.8°S, 157.0°W | Category 1 Tropical Cyclone | 23.1 | 980 |
| 1977-04-20 08:00 | -17.0°S, 156.4°W | Category 1 Tropical Cyclone | 25.7 | 980 |
| 1977-04-20 20:00 | -18.6°S, 154.8°W | Category 2 Tropical Cyclone | 33.4 | 970 |
| 1977-04-21 08:00 | -20.4°S, 152.0°W | Category 3 tropical cyclone | 41.2 | 965 |
| 1977-04-21 20:00 | -22.0°S, 147.6°W | Category 3 tropical cyclone | 36 | 980 |
| 1977-04-22 08:00 | -23.1°S, 142.5°W | Category 2 Tropical Cyclone | 30.9 | 980 |
| 1977-04-22 20:00 | -24.0°S, 138.0°W | Category 1 Tropical Cyclone | 20.6 | - |
| 1977-04-23 08:00 | -26.0°S, 134.0°W | Tropical Depression | 18 | - |
| 1977-04-23 20:00 | -27.0°S, 132.0°W | Tropical Depression | 15.4 | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1977106S12202 / SH241977. There is no official Chinese name for this system, so the original English name is used. Intensity categories follow the classifications of the local agency in the region, converted from 1-min sustained winds using WMO factors, for reference only. Data notes · Incorrect translation?
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