Tropical Cyclone Tessa
● 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.
Tessa at 1977-12-05 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 1 Tropical Cyclone , max wind 约 20.6 m/s (1 分钟平均) , minimum central pressure 990 hPa, at 1977-12-11 08:00:00前后结束, total 记录 25 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1977-12-05 08:00 | -11.0°S, 156.0°W | Tropical Depression | 12.9 | - |
| 1977-12-05 20:00 | -11.3°S, 154.5°W | Tropical Depression | 12.9 | - |
| 1977-12-06 08:00 | -11.8°S, 152.8°W | Tropical Depression | 15.4 | 997 |
| 1977-12-06 20:00 | -11.7°S, 151.4°W | Tropical Depression | 18 | 997 |
| 1977-12-07 08:00 | -11.8°S, 149.9°W | Tropical Depression | 18 | 997 |
| 1977-12-07 20:00 | -12.3°S, 148.2°W | Category 1 Tropical Cyclone | 20.6 | 990 |
| 1977-12-08 08:00 | -12.8°S, 147.0°W | Category 1 Tropical Cyclone | 20.6 | 990 |
| 1977-12-08 20:00 | -13.5°S, 145.1°W | Category 1 Tropical Cyclone | 20.6 | 990 |
| 1977-12-09 08:00 | -14.2°S, 143.5°W | Tropical Depression | 18 | 997 |
| 1977-12-09 20:00 | -15.0°S, 141.0°W | Tropical Depression | 15.4 | 997 |
| 1977-12-10 08:00 | -16.0°S, 138.0°W | Tropical Depression | 15.4 | - |
| 1977-12-10 20:00 | -17.7°S, 134.4°W | Tropical Depression | 15.4 | - |
| 1977-12-11 08:00 | -19.8°S, 129.9°W | Tropical Depression | 15.4 | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1977339S11204 / SH051978. There is no official Chinese name for this system, so the original English name is used. Intensity categories follow the local classification agency for the region, converted from 1-minute sustained winds using the WMO factor, and are provided for reference only. Data notes · Incorrect translation?
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