Tropical Cyclone Pam
● 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.
Pam at 1974-01-30 08:00:00 (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 1974-02-08 20:00:00前后结束, total 记录 39 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1974-01-30 08:00 | -15.0°S, 177.8°W | Tropical Depression | 16.5 | 997 |
| 1974-01-30 20:00 | -14.2°S, 178.7°W | Tropical Depression | 16.5 | 997 |
| 1974-01-31 08:00 | -13.1°S, 179.8°W | Tropical Depression | 16.5 | 997 |
| 1974-01-31 20:00 | -12.2°S, 178.8°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1974-02-01 08:00 | -12.2°S, 177.7°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1974-02-01 20:00 | -13.2°S, 175.7°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1974-02-02 08:00 | -14.2°S, 173.2°E | Category 3 tropical cyclone | 36 | 970 |
| 1974-02-02 20:00 | -16.0°S, 170.3°E | Category 3 tropical cyclone | 44.2 | 955 |
| 1974-02-03 08:00 | -17.8°S, 166.9°E | Category 3 tropical cyclone | 41.7 | 960 |
| 1974-02-03 20:00 | -18.8°S, 164.5°E | Category 3 tropical cyclone | 38.6 | 965 |
| 1974-02-04 08:00 | -20.1°S, 162.7°E | Category 3 tropical cyclone | 46.8 | 945 |
| 1974-02-04 20:00 | -21.9°S, 161.2°E | Category 3 tropical cyclone | 38.6 | 965 |
| 1974-02-05 08:00 | -24.1°S, 159.8°E | Tropical Cyclone | - | - |
| 1974-02-05 20:00 | -26.6°S, 158.7°E | Tropical Cyclone | - | - |
| 1974-02-06 08:00 | -29.1°S, 158.1°E | Tropical Cyclone | - | - |
| 1974-02-06 20:00 | -31.4°S, 157.9°E | Tropical Cyclone | - | - |
| 1974-02-07 08:00 | -32.9°S, 158.0°E | Tropical Cyclone | - | - |
| 1974-02-07 20:00 | -36.8°S, 159.4°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1974-02-08 08:00 | -40.2°S, 162.3°E | Tropical Cyclone | - | - |
| 1974-02-08 20:00 | -44.3°S, 165.9°E | Tropical Cyclone | - | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1974030S15182 / SH201974. This region has no official Chinese translated name, so the original English name is used. Intensity categories follow the classifications of local agencies in the region, converted from 1-minute sustained wind using WMO factors, and are for reference only. Data notes · Incorrect translation?
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