Hurricane Ilsa
● 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).
Ilsa at 1971-07-31 08:00:00 (BeijingTime) 在East Pacific首次被记录, peak intensity 为Cat 3 Hurricane, max wind 约 51.4 m/s (1 分钟平均) , minimum central pressure 978 hPa, at 1971-08-09 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 |
|---|
| 1971-07-31 08:00 | 11.9°N, 98.2°W | Tropical Depression | 12.9 | - |
| 1971-07-31 20:00 | 12.1°N, 100.1°W | Tropical Depression | 12.9 | - |
| 1971-08-01 08:00 | 12.5°N, 101.8°W | Tropical Depression | 12.9 | - |
| 1971-08-01 20:00 | 14.5°N, 105.4°W | Cat 1 Hurricane | 38.6 | - |
| 1971-08-02 08:00 | 16.2°N, 107.2°W | Cat 1 Hurricane | 38.6 | - |
| 1971-08-02 20:00 | 16.8°N, 109.2°W | Cat 1 Hurricane | 38.6 | - |
| 1971-08-03 08:00 | 17.5°N, 110.8°W | Cat 2 Hurricane | 46.3 | - |
| 1971-08-03 20:00 | 18.2°N, 111.5°W | Cat 3 Hurricane | 51.4 | - |
| 1971-08-04 08:00 | 18.8°N, 112.0°W | Cat 1 Hurricane | 33.4 | 978 |
| 1971-08-04 20:00 | 19.5°N, 112.5°W | Cat 1 Hurricane | 33.4 | - |
| 1971-08-05 08:00 | 20.8°N, 113.5°W | Cat 1 Hurricane | 33.4 | - |
| 1971-08-05 20:00 | 21.6°N, 115.8°W | Cat 1 Hurricane | 33.4 | - |
| 1971-08-06 08:00 | 22.5°N, 118.2°W | Tropical Storm | 23.1 | - |
| 1971-08-06 20:00 | 23.4°N, 120.5°W | Tropical Storm | 23.1 | - |
| 1971-08-07 08:00 | 23.8°N, 122.9°W | Tropical Depression | 12.9 | - |
| 1971-08-07 20:00 | 23.1°N, 124.2°W | Tropical Depression | 12.9 | - |
| 1971-08-08 08:00 | 22.7°N, 125.6°W | Tropical Depression | 12.9 | - |
| 1971-08-08 20:00 | 22.3°N, 127.1°W | Tropical Depression | 12.9 | - |
| 1971-08-09 02:00 | 22.3°N, 127.1°W | Tropical Depression | 12.9 | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1971212N12262 / EP091971. There is no official Chinese name for this system, so its original English name is used. Intensity categories follow the classifications of the local agency in the region, converted from 1-minute sustained winds using the WMO factor, and are for reference only. Data notes · Incorrect translation?
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