Tropical Cyclone Hal
● 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.
Hal at 1978-04-04 20:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 3 tropical cyclone , max wind 约 38.6 m/s (1 分钟平均) , minimum central pressure 965 hPa, at 1978-04-22 08:00:00前后结束, total 记录 71 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1978-04-04 20:00 | -11.4°S, 136.5°E | Tropical Depression | 11.3 | 1006 |
| 1978-04-05 14:00 | -12.1°S, 136.4°E | Tropical Depression | 13.9 | 1004 |
| 1978-04-06 08:00 | -12.5°S, 138.0°E | Category 1 Tropical Cyclone | 22.1 | 995 |
| 1978-04-07 02:00 | -12.7°S, 139.8°E | Tropical Cyclone | - | - |
| 1978-04-07 20:00 | -14.8°S, 143.2°E | Tropical Cyclone | - | - |
| 1978-04-08 14:00 | -16.2°S, 147.5°E | Tropical Cyclone | - | - |
| 1978-04-09 08:00 | -17.5°S, 148.6°E | Tropical Cyclone | - | - |
| 1978-04-10 02:00 | -17.5°S, 151.3°E | Tropical Cyclone | - | - |
| 1978-04-10 20:00 | -17.9°S, 153.2°E | Tropical Cyclone | - | - |
| 1978-04-11 14:00 | -19.2°S, 154.0°E | Tropical Cyclone | - | - |
| 1978-04-12 08:00 | -20.9°S, 153.6°E | Tropical Cyclone | - | - |
| 1978-04-13 02:00 | -23.0°S, 157.1°E | Tropical Cyclone | - | - |
| 1978-04-13 20:00 | -26.5°S, 162.2°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-04-14 14:00 | -29.4°S, 165.9°E | Tropical Cyclone | - | - |
| 1978-04-15 08:00 | -31.5°S, 166.9°E | Category 3 tropical cyclone | 38.6 | 965 |
| 1978-04-16 02:00 | -33.8°S, 165.0°E | Tropical Cyclone | - | - |
| 1978-04-16 20:00 | -32.9°S, 165.2°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1978-04-17 14:00 | -35.7°S, 168.6°E | Tropical Cyclone | - | - |
| 1978-04-18 08:00 | -39.0°S, 169.0°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1978-04-19 02:00 | -37.6°S, 172.2°E | Tropical Cyclone | - | - |
| 1978-04-19 20:00 | -41.0°S, 177.0°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-04-20 14:00 | -43.6°S, 176.0°E | Tropical Cyclone | - | - |
| 1978-04-21 08:00 | -44.5°S, 175.7°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1978-04-22 02:00 | -41.4°S, 179.5°E | Tropical Cyclone | - | - |
| 1978-04-22 08:00 | -41.3°S, 179.0°W | Tropical Depression | 16.5 | 997 |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1978095S11137 / SH321978. This basin has no official Chinese translated name, so the original English name is used. Intensity categories follow the local agency classification in the basin, converted from 1-minute sustained winds using the WMO factor, for reference only. Data notes · Incorrect translation?
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