Hurricane Alfa
● 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).
Alfa at 1973-07-30 20:00:00 (BeijingTime) 在North Atlantic首次被记录, peak intensity 为Tropical Storm, max wind 约 20.6 m/s (1 分钟平均) , minimum central pressure 1005 hPa, at 1973-08-02 14:00:00前后结束, total 记录 12 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1973-07-30 20:00 | 32.6°N, 74.1°W | Tropical Depression | 12.9 | 1011 |
| 1973-07-31 02:00 | 33.6°N, 73.2°W | Tropical Depression | 15.4 | 1011 |
| 1973-07-31 08:00 | 34.8°N, 72.3°W | Tropical Storm | 18 | 1011 |
| 1973-07-31 14:00 | 35.9°N, 71.4°W | Tropical Storm | 18 | 1011 |
| 1973-07-31 20:00 | 37.2°N, 70.7°W | Tropical Storm | 20.6 | 1011 |
| 1973-08-01 02:00 | 38.4°N, 70.2°W | Tropical Storm | 20.6 | 1005 |
| 1973-08-01 08:00 | 39.5°N, 69.8°W | Tropical Storm | 20.6 | 1006 |
| 1973-08-01 14:00 | 40.4°N, 69.6°W | Tropical Storm | 18 | 1006 |
| 1973-08-01 20:00 | 41.4°N, 69.3°W | Tropical Storm | 18 | 1007 |
| 1973-08-02 02:00 | 42.6°N, 68.9°W | Tropical Depression | 15.4 | 1008 |
| 1973-08-02 08:00 | 44.0°N, 68.0°W | Tropical Depression | 12.9 | 1010 |
| 1973-08-02 14:00 | 45.7°N, 66.0°W | Tropical Depression | 10.3 | 1010 |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1973212N33286 / AL061973. There is no official Chinese name for this system, so the original English name is used. Intensity is classified by the relevant local agency, based on 1-minute sustained wind converted using the WMO factor, for reference only. Data notes · Incorrect translation?
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