Tropical Cyclone Norma
● 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.
Norma at 1964-04-02 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Tropical Disturbance, max wind 约 7.7 m/s (1 分钟平均) , at 1964-04-06 08:00:00前后结束, total 记录 17 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1964-04-02 08:00 | -13.2°S, 82.2°E | Tropical Disturbance | 5.1 | - |
| 1964-04-02 14:00 | -12.5°S, 81.9°E | Tropical Disturbance | 5.1 | - |
| 1964-04-02 20:00 | -11.8°S, 81.7°E | Tropical Disturbance | 5.1 | - |
| 1964-04-03 02:00 | -11.0°S, 81.5°E | Tropical Disturbance | 5.1 | - |
| 1964-04-03 08:00 | -10.2°S, 81.3°E | Tropical Disturbance | 5.1 | - |
| 1964-04-03 14:00 | -10.2°S, 80.5°E | Tropical Disturbance | 5.1 | - |
| 1964-04-03 20:00 | -10.7°S, 79.5°E | Tropical Disturbance | 7.7 | - |
| 1964-04-04 02:00 | -11.4°S, 78.4°E | Tropical Disturbance | 7.7 | - |
| 1964-04-04 08:00 | -11.9°S, 77.4°E | Tropical Disturbance | 7.7 | - |
| 1964-04-04 14:00 | -12.0°S, 76.3°E | Tropical Disturbance | 5.1 | - |
| 1964-04-04 20:00 | -12.0°S, 75.2°E | Tropical Disturbance | 5.1 | - |
| 1964-04-05 02:00 | -11.8°S, 73.6°E | Tropical Disturbance | 5.1 | - |
| 1964-04-05 08:00 | -11.8°S, 72.2°E | Tropical Disturbance | 5.1 | - |
| 1964-04-05 14:00 | -12.5°S, 71.6°E | Tropical Disturbance | 5.1 | - |
| 1964-04-05 20:00 | -13.5°S, 71.2°E | Tropical Disturbance | 5.1 | - |
| 1964-04-06 02:00 | -14.5°S, 70.7°E | Tropical Disturbance | 5.1 | - |
| 1964-04-06 08:00 | -15.6°S, 70.3°E | Tropical Disturbance | 5.1 | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1964093S13082 / SH311964. No official Chinese name exists for this region, so the original English name is used. Intensity is classified by the local agency in the region where the system occurred, based on 1-minute sustained wind converted using the WMO coefficient, for reference only. Data notes · Incorrect translation?
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