Tropical Cyclone Helen
● 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).
Helen at 2007-12-31 02:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Category 1 Tropical Cyclone , max wind 约 25.7 m/s (1 分钟平均) , minimum central pressure 975 hPa, at 2008-01-07 14:00:00前后结束, total 记录 31 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 2007-12-31 02:00 | -14.6°S, 134.4°E | Tropical Depression | 12.9 | 1004 |
| 2007-12-31 14:00 | -15.2°S, 135.0°E | Tropical Depression | 12.9 | 993 |
| 2008-01-01 02:00 | -15.9°S, 134.7°E | Tropical Depression | 12.9 | 995 |
| 2008-01-01 14:00 | -15.9°S, 133.7°E | Tropical Depression | 10.3 | 993 |
| 2008-01-02 02:00 | -15.5°S, 131.5°E | Tropical Depression | 10.3 | 995 |
| 2008-01-02 14:00 | -14.5°S, 129.9°E | Tropical Depression | 10.3 | 995 |
| 2008-01-03 02:00 | -14.1°S, 128.8°E | Tropical Depression | 12.9 | 995 |
| 2008-01-03 14:00 | -14.2°S, 127.9°E | Tropical Depression | 15.4 | 993 |
| 2008-01-04 02:00 | -14.0°S, 127.7°E | Tropical Depression | 18 | 990 |
| 2008-01-04 14:00 | -13.3°S, 128.9°E | Category 1 Tropical Cyclone | 23.1 | 981 |
| 2008-01-05 02:00 | -13.3°S, 131.0°E | Category 1 Tropical Cyclone | 23.1 | 980 |
| 2008-01-05 14:00 | -13.3°S, 133.7°E | Tropical Depression | 15.4 | 992 |
| 2008-01-06 02:00 | -13.6°S, 136.7°E | Tropical Depression | 15.4 | 992 |
| 2008-01-06 14:00 | -14.2°S, 140.3°E | Tropical Depression | 15.4 | 992 |
| 2008-01-07 02:00 | -14.4°S, 142.0°E | Tropical Depression | 12.9 | 1004 |
| 2008-01-07 14:00 | -14.9°S, 143.4°E | Tropical Depression | 10.3 | 1007 |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 2007365S15134 / SH102008. There is no official Chinese name for this system, so the original English name is used. Intensity follows the local agency scale for the basin, converted from 1-minute sustained winds using the WMO factor, and is for reference only. Data notes · Incorrect translation?
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