Tropical Cyclone Atu
● Data reliability: ReliableWeather satellites monitored it throughout, so its track and intensity are relatively accurate (Atlantic and E. Pacific since 1966, other basins since 1980).
Atu at 2011-02-17 02:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 4 tropical cyclone , max wind 约 59.2 m/s (1 分钟平均) , minimum central pressure 940 hPa, at 2011-02-27 20:00:00前后结束, total 记录 44 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 2011-02-17 02:00 | -13.5°S, 171.0°E | Tropical Depression | 8.2 | 1003 |
| 2011-02-17 14:00 | -14.4°S, 170.7°E | Tropical Depression | 10.3 | 1002 |
| 2011-02-18 02:00 | -14.5°S, 169.5°E | Tropical Depression | 12.9 | 1002 |
| 2011-02-18 14:00 | -15.0°S, 169.2°E | Tropical Depression | 15.4 | 999 |
| 2011-02-19 02:00 | -15.6°S, 169.5°E | Tropical Depression | 18 | 997 |
| 2011-02-19 14:00 | -16.2°S, 169.0°E | Category 1 Tropical Cyclone | 25.7 | 994 |
| 2011-02-20 02:00 | -16.7°S, 169.2°E | Category 2 Tropical Cyclone | 30.9 | 987 |
| 2011-02-20 14:00 | -17.0°S, 169.4°E | Category 3 tropical cyclone | 46.3 | 973 |
| 2011-02-21 02:00 | -17.5°S, 169.7°E | Category 4 tropical cyclone | 59.2 | 940 |
| 2011-02-21 14:00 | -18.4°S, 170.2°E | Category 4 tropical cyclone | 54 | 940 |
| 2011-02-22 02:00 | -19.8°S, 171.1°E | Category 4 tropical cyclone | 51.4 | 940 |
| 2011-02-22 14:00 | -22.6°S, 172.2°E | Category 4 tropical cyclone | 48.9 | 940 |
| 2011-02-23 02:00 | -25.4°S, 173.7°E | Category 3 tropical cyclone | 46.3 | 945 |
| 2011-02-23 14:00 | -28.5°S, 176.4°E | Category 3 tropical cyclone | 38.6 | 945 |
| 2011-02-24 02:00 | -31.5°S, 179.5°E | Category 2 Tropical Cyclone | 30.9 | 965 |
| 2011-02-24 14:00 | -33.1°S, 176.9°W | Category 1 Tropical Cyclone | 23.1 | 970 |
| 2011-02-25 02:00 | -33.9°S, 173.9°W | Tropical Depression | 18 | 986 |
| 2011-02-25 14:00 | -36.0°S, 171.9°W | Extratropical cyclone | 18 | 984 |
| 2011-02-26 02:00 | -39.0°S, 173.0°W | Category 1 Tropical Cyclone | 22.1 | 981 |
| 2011-02-26 14:00 | -43.0°S, 171.0°W | Category 1 Tropical Cyclone | 22.1 | 982 |
| 2011-02-27 02:00 | -47.0°S, 171.0°W | Category 1 Tropical Cyclone | 22.1 | 986 |
| 2011-02-27 14:00 | -51.0°S, 169.0°W | Category 1 Tropical Cyclone | 22.1 | 985 |
| 2011-02-27 20:00 | -52.0°S, 167.0°W | Category 1 Tropical Cyclone | 22.1 | 988 |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 2011048S14171 / SH172011. No official Chinese name is available for this basin, so the original English name is used. Intensity is classified by the local agency in the basin, converted from 1-minute sustained winds using the WMO factor, for reference only. Data notes · Incorrect translation?
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