Tropical Cyclone Isa
● Data reliability: Generally reliable——Aircraft entered typhoons for in situ measurements, but satellites were not yet widespread: tracks are generally accurate, while intensities may be biased, with weaker cyclones potentially going unrecorded from 1950 until the advent of satellite coverage.
Isa at 1970-04-14 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Tropical Depression, max wind 约 12.9 m/s (1 分钟平均) , minimum central pressure 990 hPa, at 1970-04-19 08:00:00前后结束, total 记录 21 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1970-04-14 08:00 | -9.6°S, 163.9°E | Tropical Depression | 5.1 | 990 |
| 1970-04-14 14:00 | -9.7°S, 163.2°E | Tropical Depression | 7.7 | - |
| 1970-04-14 20:00 | -9.8°S, 162.5°E | Tropical Depression | 10.3 | 990 |
| 1970-04-15 02:00 | -9.9°S, 161.8°E | Tropical Depression | 12.9 | - |
| 1970-04-15 08:00 | -9.9°S, 161.2°E | Tropical Depression | 12.9 | 990 |
| 1970-04-15 14:00 | -9.4°S, 160.8°E | Tropical Depression | 10.3 | - |
| 1970-04-15 20:00 | -8.9°S, 160.6°E | Tropical Depression | 10.3 | 990 |
| 1970-04-16 02:00 | -8.5°S, 160.4°E | Tropical Depression | 7.7 | - |
| 1970-04-16 08:00 | -8.2°S, 160.0°E | Tropical Depression | 7.7 | - |
| 1970-04-16 14:00 | -8.0°S, 159.3°E | Tropical Depression | 10.3 | - |
| 1970-04-16 20:00 | -7.9°S, 158.7°E | Tropical Depression | 10.3 | - |
| 1970-04-17 02:00 | -7.8°S, 158.0°E | Tropical Depression | 10.3 | - |
| 1970-04-17 08:00 | -7.8°S, 157.4°E | Tropical Depression | 10.3 | - |
| 1970-04-17 14:00 | -8.0°S, 156.4°E | Tropical Depression | 10.3 | - |
| 1970-04-17 20:00 | -8.3°S, 155.6°E | Tropical Depression | 10.3 | - |
| 1970-04-18 02:00 | -8.6°S, 154.9°E | Tropical Depression | 7.7 | - |
| 1970-04-18 08:00 | -8.8°S, 154.3°E | Tropical Depression | 7.7 | - |
| 1970-04-18 14:00 | -8.9°S, 154.1°E | Tropical Depression | 7.7 | - |
| 1970-04-18 20:00 | -9.0°S, 154.1°E | Tropical Depression | 7.7 | - |
| 1970-04-19 02:00 | -9.2°S, 154.3°E | Tropical Depression | 7.7 | - |
| 1970-04-19 08:00 | -9.5°S, 154.7°E | Tropical Cyclone | - | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1970104S10164 / SH311970. This area has no official Chinese name, so the original English name is used. Intensity is classified by the regional agency based on the 1-minute sustained wind, converted using the WMO factor, for reference only. Data notes · Incorrect translation?
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