The SummaryTyphoon Freda (international code 197712) is a 1977 Northwest Pacific typhoon; peak intensity Severe Tropical Storm, max wind 28m/s, minimum central pressure 980hPa, not in China Landfall, 1977-09-25 was numbered off, recorded 9 track points.
Typhoon Freda, international code 197712, international name FREDA, 1977 Northwest Pacific typhoon. Formed: 1977-09-23 00:00:00, ended: 1977-09-25 00:00:00. Peak intensity: Severe Tropical Storm, minimum central pressure: 980 hPa, max wind: 28m/s.
Typhoon Freda at 1977-09-23 00:00:00 at 18.2°N, 124.3°E over the Northwest Pacific; initial intensity: Nameless.
It peaked at Severe Tropical Storm intensity with max winds of 28 m/s (~101 km/h) and a minimum central pressure of 980hPa, recorded at 1977-09-24 12:00:00.
Typhoon Freda gradually weakened and was numbered off on 1977-09-25 00:00:00 was numbered off; its lifecycle recorded 9 track points.
Typhoon Freda (197712) 的生命周期较短, 从 formed到消散仅持续约48h. 其路径整体呈现稳定的NW toward MovingTrend, 未出现明显的转 toward 或停滞现象. 起始 at 1977年9月23日00时的Philippines以E洋面 (18.2°N, 124.3°E) , 系统迅速 toward W穿Vietnam海N部. 在随后的36h内, Typhoon 中心The latitude由18.2°N逐步N抬至22.2°N, During则由124.3°EW进至109.8°E, 平均移速较快, 显示出较强的引导气流作用. 值得注意的是, 该Typhoon 全程无Landfall记录, 最终在接近中S半岛coastal 前减弱消散. track points分布均匀, 表明其Moving轨迹较为平直, 受周围大型天气系统干扰较小, 主要受副热带高压S侧E气流引导 toward W行进.
在Intensity变化方面, Freda经历了“ formed-增强-巅峰-减弱”的完整过程. 初始阶段为Nameless, max wind 维持在15m/s. Go to S海后, 系统 at 9月24日00时 intensified into Tropical Storm (23m/s) , 并在随后12h内迅速增强, at 9月24日12时达到peak intensity, 定性为Severe Tropical Storm, max wind 达28m/s. 巅峰状态维持Time较短, 约6h后开始减弱, 至9月25日00时已回落至Nameless等级 (17m/s) . 这种快速增强后迅速减弱的特征, 可能与S海N部海温条件及垂直风切变的变化有关.
Freda's Intensity was significantly weaker than the previous Typhoon in 1977.Typhoon in history, 1987 (198713) and 1965 (196508) had both reached the Super Typhoon level, and 1971 (197108) also reached the Typhoon level.Even if the life cycle of the system in 1977 was shorter than Fred (198407) in 1984, which was also designated Severe Tropical Storm, and did not show the same degree of structural stability.
| Time | The latitude | During | Intensity | Wind (m/s) | Pressure (hPa) | Moving toward |
|---|---|---|---|---|---|---|
| 1977-09-23 00:00:00 | 18.2°N | 124.3°E | Nameless | 15 | 994 | |
| 1977-09-23 06:00:00 | 18.8°N | 122.4°E | Nameless | 15 | 992 | |
| 1977-09-23 12:00:00 | 19.2°N | 120.5°E | Nameless | 15 | 990 | |
| 1977-09-23 18:00:00 | 19.4°N | 118.5°E | Nameless | 17 | 985 | |
| 1977-09-24 00:00:00 | 19.7°N | 116.6°E | Tropical Storm | 23 | 985 | |
| 1977-09-24 06:00:00 | 20.3°N | 114.8°E | Severe Tropical Storm | 25 | 980 | |
| 1977-09-24 12:00:00 | 20.9°N | 113.1°E | Severe Tropical Storm | 28 | 980 | |
| 1977-09-24 18:00:00 | 21.5°N | 111.4°E | Severe Tropical Storm | 25 | 985 | |
| 1977-09-25 00:00:00 | 22.2°N | 109.8°E | Nameless | 17 | 996 |
International code for Typhoon Freda is 197712, is the 12th Typhoon of 1977, international name FREDA.
Typhoon Freda peak intensity is Severe Tropical Storm, max wind 28m/s, minimum central pressure 980 hPa.
According to records, Typhoon Freda is not in our coastal landfall.
TyphoonSays (taifengshuo.com) provides typhoon Freda's Track history map, multinational meteorological agency Forecast comparison, wind range with IntensityTrend, page address: https://taifengshuo.com/typhoon/197712.
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