Tropical Cyclone Bob
● 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.
Bob at 1977-12-31 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 4 tropical cyclone , max wind 约 51.4 m/s (1 分钟平均) , at 1978-01-12 08:00:00前后结束, total 记录 49 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1977-12-31 08:00 | -8.5°S, 172.5°W | Tropical Depression | 18 | - |
| 1978-01-01 02:00 | -9.1°S, 176.0°W | Category 1 Tropical Cyclone | 20.6 | - |
| 1978-01-01 20:00 | -9.6°S, 178.8°W | Category 2 Tropical Cyclone | 28.3 | - |
| 1978-01-02 14:00 | -10.6°S, 178.7°E | Category 2 Tropical Cyclone | 33.4 | - |
| 1978-01-03 08:00 | -11.6°S, 177.3°E | Category 3 tropical cyclone | 36 | - |
| 1978-01-04 02:00 | -13.6°S, 175.2°E | Category 4 tropical cyclone | 48.9 | - |
| 1978-01-04 20:00 | -16.3°S, 173.1°E | Category 4 tropical cyclone | 48.9 | - |
| 1978-01-05 14:00 | -19.0°S, 171.6°E | Category 3 tropical cyclone | 38.6 | - |
| 1978-01-06 08:00 | -21.7°S, 169.8°E | Category 2 Tropical Cyclone | 28.3 | - |
| 1978-01-07 02:00 | -23.6°S, 167.7°E | Category 1 Tropical Cyclone | 25.7 | - |
| 1978-01-07 20:00 | -25.4°S, 166.1°E | Category 1 Tropical Cyclone | 23.1 | - |
| 1978-01-08 14:00 | -27.7°S, 165.7°E | Category 1 Tropical Cyclone | 20.6 | - |
| 1978-01-09 08:00 | -30.1°S, 167.1°E | Tropical Depression | 18 | - |
| 1978-01-10 02:00 | -32.3°S, 173.3°E | Tropical Cyclone | - | - |
| 1978-01-10 20:00 | -34.3°S, 178.8°E | Tropical Cyclone | - | - |
| 1978-01-11 14:00 | -35.7°S, 177.6°W | Tropical Cyclone | - | - |
| 1978-01-12 08:00 | -38.9°S, 174.0°W | Tropical Cyclone | - | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1977365S09188 / SH111978. This basin has no official Chinese name, so the original English name is used. Intensity categories follow the classifications of the relevant local agency, converted from 1-minute sustained wind using the WMO factor, for reference only. Data notes · Incorrect translation?
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