Tropical Cyclone Helga
● Data reliability: Track onlyOnly an approximate Position is available, with no wind speed or pressure records, so it is not included in Intensity rankings. This mainly applies to early records from the Indian Ocean and Southern Hemisphere.
Helga at 1971-02-02 14:00:00 (BeijingTime) 在South Indian Ocean首次被记录, 没有Intensity记录, at 1971-02-15 08:00:00前后结束, total 记录 52 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1971-02-02 14:00 | -15.5°S, 61.0°E | Tropical Cyclone | - | - |
| 1971-02-03 08:00 | -17.1°S, 60.8°E | Tropical Cyclone | - | - |
| 1971-02-04 02:00 | -17.9°S, 59.9°E | Tropical Cyclone | - | - |
| 1971-02-04 20:00 | -18.1°S, 59.2°E | Tropical Cyclone | - | - |
| 1971-02-05 14:00 | -18.3°S, 59.8°E | Tropical Cyclone | - | - |
| 1971-02-06 08:00 | -19.3°S, 60.8°E | Tropical Cyclone | - | - |
| 1971-02-07 02:00 | -20.4°S, 60.7°E | Tropical Cyclone | - | - |
| 1971-02-07 20:00 | -21.1°S, 59.5°E | Tropical Cyclone | - | - |
| 1971-02-08 14:00 | -21.4°S, 57.7°E | Tropical Cyclone | - | - |
| 1971-02-09 08:00 | -22.5°S, 55.8°E | Tropical Cyclone | - | - |
| 1971-02-10 02:00 | -24.1°S, 54.5°E | Tropical Cyclone | - | - |
| 1971-02-10 20:00 | -26.1°S, 53.3°E | Tropical Cyclone | - | - |
| 1971-02-11 14:00 | -28.6°S, 51.7°E | Tropical Cyclone | - | - |
| 1971-02-12 08:00 | -32.8°S, 51.9°E | Tropical Cyclone | - | - |
| 1971-02-13 02:00 | -35.8°S, 53.5°E | Extratropical cyclone | - | - |
| 1971-02-13 20:00 | -35.4°S, 55.2°E | Extratropical cyclone | - | - |
| 1971-02-14 14:00 | -34.0°S, 53.0°E | Extratropical cyclone | - | - |
| 1971-02-15 08:00 | -32.8°S, 48.8°E | Extratropical cyclone | - | - |
Data sources: NOAA National Environmental Information Center IBTrACS v04r01 (Knapp et al., 2010), code 1971033S16061 / SH141971. No official Chinese name is available for this basin; the original English name is used. Intensity grades follow the classifications of the local basin agency, converted from 1-minute sustained winds using the WMO factor, and are for reference only. Data notes · Incorrect translation?
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