Hurricane Gretchen
● 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).
Gretchen at 1970-07-14 20:00:00 (BeijingTime) 在East Pacific首次被记录, peak intensity 为Tropical Storm, max wind 约 23.1 m/s (1 分钟平均) , minimum central pressure 1009 hPa, at 1970-07-21 20:00:00前后结束, total 记录 29 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1970-07-14 20:00 | 15.1°N, 107.7°W | Tropical Depression | 12.9 | - |
| 1970-07-15 08:00 | 15.8°N, 110.5°W | Tropical Storm | 20.6 | - |
| 1970-07-15 20:00 | 16.7°N, 112.6°W | Tropical Storm | 23.1 | - |
| 1970-07-16 08:00 | 16.7°N, 114.2°W | Tropical Storm | 23.1 | - |
| 1970-07-16 20:00 | 16.5°N, 115.4°W | Tropical Storm | 23.1 | - |
| 1970-07-17 08:00 | 16.6°N, 116.2°W | Tropical Storm | 23.1 | - |
| 1970-07-17 20:00 | 17.3°N, 116.7°W | Tropical Storm | 23.1 | - |
| 1970-07-18 08:00 | 17.6°N, 117.2°W | Tropical Storm | 23.1 | - |
| 1970-07-18 20:00 | 17.9°N, 117.7°W | Tropical Storm | 23.1 | - |
| 1970-07-19 08:00 | 18.2°N, 118.2°W | Tropical Storm | 20.6 | - |
| 1970-07-19 20:00 | 18.5°N, 118.6°W | Tropical Storm | 20.6 | - |
| 1970-07-20 08:00 | 18.7°N, 118.9°W | Tropical Storm | 18 | - |
| 1970-07-20 20:00 | 18.9°N, 119.6°W | Tropical Depression | 15.4 | - |
| 1970-07-21 08:00 | 18.7°N, 120.4°W | Tropical Depression | 12.9 | - |
| 1970-07-21 20:00 | 18.4°N, 121.3°W | Tropical Depression | 12.9 | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1970196N15252 / EP061970. No official Chinese name is available for this storm, so the English name is used. Intensity is classified by the local agency for the basin, based on 1-minute sustained wind converted using the WMO factor, for reference only. Data notes · Incorrect translation?
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