Tropical Cyclone Billy
● 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).
Billy at 1998-12-01 20:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Category 2 Tropical Cyclone , max wind 约 33.4 m/s (1 分钟平均) , minimum central pressure 966 hPa, at 1998-12-07 14:00:00前后结束, total 记录 24 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1998-12-01 20:00 | -13.2°S, 120.1°E | Tropical Depression | 10.3 | - |
| 1998-12-02 02:00 | -13.9°S, 120.1°E | Tropical Depression | 12.9 | - |
| 1998-12-02 08:00 | -14.9°S, 120.1°E | Tropical Depression | 12.9 | 1001 |
| 1998-12-02 14:00 | -15.7°S, 120.0°E | Tropical Depression | 12.9 | 996 |
| 1998-12-02 20:00 | -16.2°S, 119.6°E | Tropical Depression | 12.9 | 991 |
| 1998-12-03 02:00 | -16.6°S, 119.2°E | Tropical Depression | 15.4 | 986 |
| 1998-12-03 08:00 | -16.9°S, 118.7°E | Tropical Depression | 18 | 985 |
| 1998-12-03 14:00 | -17.2°S, 118.1°E | Category 1 Tropical Cyclone | 20.6 | 985 |
| 1998-12-03 20:00 | -17.4°S, 117.6°E | Category 1 Tropical Cyclone | 23.1 | 981 |
| 1998-12-04 02:00 | -17.7°S, 117.2°E | Category 2 Tropical Cyclone | 28.3 | 976 |
| 1998-12-04 08:00 | -18.0°S, 116.9°E | Category 2 Tropical Cyclone | 33.4 | 966 |
| 1998-12-04 14:00 | -18.3°S, 116.6°E | Category 2 Tropical Cyclone | 33.4 | 968 |
| 1998-12-04 20:00 | -18.6°S, 116.3°E | Category 2 Tropical Cyclone | 33.4 | 970 |
| 1998-12-05 02:00 | -18.9°S, 115.9°E | Category 2 Tropical Cyclone | 30.9 | 975 |
| 1998-12-05 08:00 | -19.3°S, 115.6°E | Category 2 Tropical Cyclone | 30.9 | 980 |
| 1998-12-05 14:00 | -19.5°S, 115.4°E | Category 1 Tropical Cyclone | 25.7 | 985 |
| 1998-12-05 20:00 | -20.1°S, 115.2°E | Category 1 Tropical Cyclone | 23.1 | 990 |
| 1998-12-06 02:00 | -20.5°S, 115.0°E | Category 1 Tropical Cyclone | 23.1 | 995 |
| 1998-12-06 08:00 | -21.0°S, 114.9°E | Category 1 Tropical Cyclone | 20.6 | 998 |
| 1998-12-06 14:00 | -21.6°S, 115.1°E | Tropical Depression | 18 | 1000 |
| 1998-12-06 20:00 | -22.5°S, 115.5°E | Tropical Depression | 12.9 | - |
| 1998-12-07 02:00 | -23.2°S, 115.8°E | Tropical Depression | 12.9 | - |
| 1998-12-07 08:00 | -23.9°S, 116.5°E | Tropical Depression | 10.3 | - |
| 1998-12-07 14:00 | -24.6°S, 117.7°E | Tropical Depression | 10.3 | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1998336S13120 / SH051999. There is no official Chinese name for this system, so the original English name is used. Intensity is classified by the local agency in the relevant sea area, based on the WMO conversion of 1-minute sustained wind, for reference only. Data notes · Incorrect translation?
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