Tropical Cyclone Helyette
● 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).
Helyette at 1981-01-28 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Moderate Tropical Storm, max wind 约 23.1 m/s (1 分钟平均) , at 1981-02-06 14:00:00前后结束, total 记录 38 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1981-01-28 08:00 | -11.7°S, 69.0°E | Tropical Disturbance | 10.3 | - |
| 1981-01-28 20:00 | -12.6°S, 69.2°E | Tropical Disturbance | 12.9 | - |
| 1981-01-29 08:00 | -13.8°S, 69.6°E | Tropical Disturbance | 15.4 | - |
| 1981-01-29 20:00 | -15.1°S, 69.3°E | Tropical Depression | 18 | - |
| 1981-01-30 08:00 | -16.8°S, 68.6°E | Moderate Tropical Storm | 23.1 | - |
| 1981-01-30 20:00 | -18.2°S, 66.8°E | Moderate Tropical Storm | 23.1 | - |
| 1981-01-31 08:00 | -18.8°S, 64.5°E | Tropical Depression | 18 | - |
| 1981-01-31 20:00 | -19.4°S, 61.5°E | Tropical Disturbance | 15.4 | - |
| 1981-02-01 08:00 | -20.1°S, 58.4°E | Tropical Disturbance | 15.4 | - |
| 1981-02-01 20:00 | -21.3°S, 55.9°E | Tropical Disturbance | 15.4 | - |
| 1981-02-02 08:00 | -23.2°S, 52.6°E | Tropical Depression | 18 | - |
| 1981-02-02 20:00 | -24.0°S, 50.7°E | Tropical Depression | 18 | - |
| 1981-02-03 08:00 | -23.8°S, 48.5°E | Moderate Tropical Storm | 20.6 | - |
| 1981-02-03 20:00 | -24.1°S, 45.3°E | Moderate Tropical Storm | 20.6 | - |
| 1981-02-04 08:00 | -25.0°S, 43.6°E | Tropical Disturbance | 12.9 | - |
| 1981-02-04 20:00 | -26.5°S, 41.9°E | Tropical Disturbance | 10.3 | - |
| 1981-02-05 08:00 | -29.0°S, 43.4°E | Tropical Cyclone | - | - |
| 1981-02-05 20:00 | -29.9°S, 47.0°E | Tropical Cyclone | - | - |
| 1981-02-06 08:00 | -32.1°S, 50.0°E | Tropical Cyclone | - | - |
| 1981-02-06 14:00 | -34.0°S, 51.0°E | Extratropical cyclone | - | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1981028S12069 / SH131981. This area has no official Chinese translation, so the original English name is used. Intensity is classified by the local agency in the region, converted from 1-minute sustained winds using the WMO factor, for reference only. Data notes · Incorrect translation?
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