Tropical Cyclone Norah
● 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.
Norah at 1974-10-28 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Category 2 Tropical Cyclone , max wind 约 33.4 m/s (1 分钟平均) , minimum central pressure 981 hPa, at 1974-11-04 08:00:00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 |
|---|
| 1974-10-28 08:00 | -8.0°S, 105.1°E | Tropical Depression | 11.3 | 1006 |
| 1974-10-28 20:00 | -7.7°S, 104.1°E | Tropical Depression | 11.3 | 1006 |
| 1974-10-29 08:00 | -7.6°S, 103.2°E | Tropical Depression | 11.3 | 1006 |
| 1974-10-29 20:00 | -8.0°S, 101.1°E | Tropical Depression | 11.3 | 1005 |
| 1974-10-30 08:00 | -9.8°S, 99.0°E | Tropical Depression | 13.9 | 1003 |
| 1974-10-30 20:00 | -10.2°S, 97.1°E | Tropical Depression | 16.5 | 997 |
| 1974-10-31 08:00 | -11.2°S, 95.0°E | Category 1 Tropical Cyclone | 22.1 | 994 |
| 1974-10-31 20:00 | -12.0°S, 93.4°E | Category 2 Tropical Cyclone | 27.8 | 987 |
| 1974-11-01 08:00 | -12.5°S, 91.6°E | Category 2 Tropical Cyclone | 33.4 | 981 |
| 1974-11-01 20:00 | -12.8°S, 89.8°E | Severe Tropical Storm | 27.8 | 988 |
| 1974-11-02 08:00 | -13.1°S, 87.6°E | Moderate Tropical Storm | 22.1 | 994 |
| 1974-11-02 20:00 | -13.2°S, 85.0°E | Moderate Tropical Storm | 19.5 | 995 |
| 1974-11-03 08:00 | -12.7°S, 82.4°E | Tropical Depression | 16.5 | 999 |
| 1974-11-03 20:00 | -12.0°S, 79.6°E | Tropical Cyclone | - | - |
| 1974-11-04 08:00 | -11.3°S, 76.6°E | Tropical Cyclone | - | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1974301S08105. There is no official Chinese name for this storm, so the original English name is used. Intensity categories follow the local agency classification for the basin, converted from 1-minute sustained winds using the WMO factor, and are for reference only. Data notes · Incorrect translation?
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