Tropical Cyclone Alan
● 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).
Alan at 1998-04-18 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 1 Tropical Cyclone , max wind 约 23.1 m/s (1 分钟平均) , minimum central pressure 995 hPa, at 1998-04-27 02:00:00前后结束, total 记录 36 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1998-04-18 08:00 | -10.0°S, 157.0°W | Tropical Depression | 13.9 | 1000 |
| 1998-04-18 20:00 | -12.4°S, 157.4°W | Tropical Depression | 13.9 | 1000 |
| 1998-04-19 08:00 | -14.1°S, 157.6°W | Tropical Depression | 16.5 | 998 |
| 1998-04-19 20:00 | -14.8°S, 158.3°W | Tropical Depression | 16.5 | 997 |
| 1998-04-20 08:00 | -13.9°S, 158.3°W | Tropical Depression | 12.9 | 997 |
| 1998-04-20 20:00 | -13.0°S, 158.9°W | Tropical Depression | 12.9 | 997 |
| 1998-04-21 08:00 | -12.0°S, 159.4°W | Tropical Depression | 12.9 | 997 |
| 1998-04-21 20:00 | -11.2°S, 159.3°W | Tropical Depression | 18 | 995 |
| 1998-04-22 08:00 | -10.7°S, 159.2°W | Tropical Depression | 18 | 995 |
| 1998-04-22 20:00 | -10.8°S, 159.2°W | Category 1 Tropical Cyclone | 23.1 | - |
| 1998-04-23 08:00 | -11.2°S, 159.4°W | Category 1 Tropical Cyclone | 23.1 | - |
| 1998-04-23 20:00 | -11.8°S, 158.9°W | Category 1 Tropical Cyclone | 23.1 | - |
| 1998-04-24 08:00 | -13.0°S, 157.3°W | Category 1 Tropical Cyclone | 23.1 | - |
| 1998-04-24 20:00 | -14.5°S, 155.4°W | Category 1 Tropical Cyclone | 23.1 | - |
| 1998-04-25 08:00 | -15.7°S, 153.9°W | Category 1 Tropical Cyclone | 23.1 | - |
| 1998-04-25 20:00 | -16.0°S, 152.7°W | Category 1 Tropical Cyclone | 23.1 | - |
| 1998-04-26 08:00 | -16.3°S, 152.3°W | Tropical Depression | 18 | - |
| 1998-04-26 20:00 | -16.7°S, 151.8°W | Tropical Depression | 15.4 | - |
| 1998-04-27 02:00 | -16.9°S, 151.3°W | Tropical Depression | 12.9 | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1998108S10203 / SH361998. There is no official Chinese name for this system, so the original English name is used. Intensity is classified by the relevant local agency in the region, converted from 1-min sustained wind using WMO factors, for reference only. Data notes · Incorrect translation?
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