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 1978-01-31 20:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 3 tropical cyclone , max wind 约 46.8 m/s (1 分钟平均) , minimum central pressure 945 hPa, at 1978-02-12 08:00:00前后结束, total 记录 47 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1978-01-31 20:00 | -8.5°S, 173.0°W | Tropical Depression | 16.5 | 997 |
| 1978-02-01 08:00 | -9.0°S, 176.0°W | Tropical Depression | 16.5 | 997 |
| 1978-02-01 20:00 | -10.0°S, 179.0°W | Tropical Depression | 16.5 | 997 |
| 1978-02-02 08:00 | -10.5°S, 179.0°E | Tropical Depression | 16.5 | 997 |
| 1978-02-02 20:00 | -11.0°S, 178.3°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-02-03 08:00 | -12.0°S, 177.5°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-02-03 20:00 | -13.0°S, 176.0°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1978-02-04 08:00 | -14.7°S, 174.7°E | Category 3 tropical cyclone | 36 | 970 |
| 1978-02-04 20:00 | -16.5°S, 173.5°E | Category 3 tropical cyclone | 41.7 | 960 |
| 1978-02-05 08:00 | -18.0°S, 172.5°E | Category 3 tropical cyclone | 46.8 | 945 |
| 1978-02-05 20:00 | -20.0°S, 171.0°E | Category 3 tropical cyclone | 41.7 | 960 |
| 1978-02-06 08:00 | -21.5°S, 169.9°E | Category 3 tropical cyclone | 36 | 970 |
| 1978-02-06 20:00 | -23.0°S, 168.5°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1978-02-07 08:00 | -24.0°S, 167.0°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-02-07 20:00 | -25.0°S, 166.0°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-02-08 08:00 | -26.5°S, 165.5°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-02-08 20:00 | -28.0°S, 166.0°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-02-09 08:00 | -30.5°S, 167.0°E | Tropical Depression | 16.5 | 997 |
| 1978-02-09 20:00 | -31.5°S, 170.0°E | Tropical Depression | 16.5 | 997 |
| 1978-02-10 08:00 | -32.5°S, 175.0°E | Tropical Depression | 16.5 | 997 |
| 1978-02-10 20:00 | -33.6°S, 178.2°E | Tropical Depression | 16.5 | 997 |
| 1978-02-11 08:00 | -35.0°S, 179.0°W | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-02-11 20:00 | -36.5°S, 176.2°W | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-02-12 08:00 | -38.0°S, 174.0°W | Category 1 Tropical Cyclone | 22.1 | 990 |
Data source: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1978032S09187. There is no official Chinese name for this system, so the original English name is used. Intensity categories follow the local agency classification for the region and are converted from 1-minute sustained winds using the WMO factor, for reference only. Data notes · Incorrect translation?
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