Tropical Cyclone Ursula
● 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.
Ursula at 1971-12-02 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 3 tropical cyclone , max wind 约 38.6 m/s (1 分钟平均) , minimum central pressure 965 hPa, at 1971-12-16 08:00:00前后结束, total 记录 57 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1971-12-02 08:00 | -6.9°S, 169.8°E | Tropical Cyclone | - | - |
| 1971-12-03 02:00 | -8.0°S, 167.5°E | Tropical Cyclone | - | - |
| 1971-12-03 20:00 | -8.2°S, 166.7°E | Tropical Depression | 16.5 | 997 |
| 1971-12-04 14:00 | -8.6°S, 165.9°E | Tropical Cyclone | - | - |
| 1971-12-05 08:00 | -9.0°S, 165.0°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1971-12-06 02:00 | -9.5°S, 164.2°E | Tropical Cyclone | - | - |
| 1971-12-06 20:00 | -10.5°S, 162.8°E | Category 3 tropical cyclone | 36 | 970 |
| 1971-12-07 14:00 | -13.0°S, 162.7°E | Tropical Cyclone | - | - |
| 1971-12-08 08:00 | -15.6°S, 165.2°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1971-12-09 02:00 | -16.8°S, 168.1°E | Tropical Cyclone | - | - |
| 1971-12-09 20:00 | -18.2°S, 171.8°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1971-12-10 14:00 | -19.8°S, 174.3°E | Tropical Cyclone | - | - |
| 1971-12-11 08:00 | -21.2°S, 176.5°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1971-12-12 02:00 | -24.2°S, 176.7°E | Tropical Cyclone | - | - |
| 1971-12-12 20:00 | -26.6°S, 175.8°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1971-12-13 14:00 | -28.1°S, 173.6°E | Tropical Cyclone | - | - |
| 1971-12-14 08:00 | -28.6°S, 170.6°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1971-12-15 02:00 | -29.7°S, 169.5°E | Tropical Cyclone | - | - |
| 1971-12-15 20:00 | -30.5°S, 168.5°E | Tropical Cyclone | - | - |
| 1971-12-16 08:00 | -31.0°S, 168.0°E | Tropical Cyclone | - | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1971336S07170 / SH051972. There is no official Chinese name for this system, so the original English name is used. Intensity grades follow the local agency classification for the region, converted from 1-minute sustained winds using the WMO factor, and are for reference only. Data notes · Incorrect translation?
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