The SummaryTyphoon Alex (international code 198403) is a 1984 Northwest Pacific typhoon; peak intensity Typhoon, max wind 38m/s, minimum central pressure 960hPa, not in China Landfall, 1984-07-05 was numbered off, recording 18 track points.
Typhoon Alex, international code 198403, international name ALEX, 1984 Northwest Pacific typhoon. Formed: 1984-07-01 00:00:00, ended: 1984-07-05 06:00:00. Peak intensity: Typhoon , minimum central pressure: 960 hPa, max wind: 38m/s.
Typhoon Alex at 1984-07-01 00:00:00 at 16.1°N, 124.5°E over the Northwest Pacific; initial intensity: Nameless.
It peaked at Typhoon intensity with max winds of 38 m/s (~137 km/h) and a minimum central pressure of 960hPa, recorded at 1984-07-03 06:00:00.
1984-07-05 06:00:00 After, Typhoon Alex gradually weakened and was numbered off on 1984-07-05 06:00:00 was numbered off; its lifecycle recorded 18 track points.
Typhoon Alex (198403) 的生命周期始 at Philippines以E洋面, 整体呈现显著的NW至NE转 toward 抛物线型路径. formed初期 (7月1日00:00至12:00) , 系统在16.1°N附近滞留并缓慢W移, 随后转为稳定的NW. 从7月1日18:00的Tropical Storm阶段开始, 其During持续减小, The latitude稳步增加, 表明受副热带高压引导气流影响显著.
The key turning point of the path appeared between 06:00 and 12:00 on July 3rd. At this time the center of the system at 23.3°N, at 121.5°E near peak intensity, Moving direction gradually shifted from NW to N, and then toward NE. After 00:00 on July 4th, with the latitude breaking 27°N, the system Go to the mid-latitude W wind belt impact range, the path clearly toward E bends, the length rapidly rising from 121.2°E to 127.2°E. Thro the process, the system did not landfall any land, always in marine activity, and finally at 06:00 on July 5th at 35.4°N, 127.2°E weakened into Nameless and ended observations.
Alex的Intensity演变经历了完整的“ formed-增强-巅峰-减弱”过程. 7月1日18:00 intensified into Tropical Storm (20m/s) , 随后快速增强, 仅用不到两天Time, at 7月2日18:00升级为Typhoon (33m/s) . 其巅峰状态出现在7月3日06:00, max wind 达38m/s, 维持Typhoon 等级约18h后开始减弱. 7月4日00:00降格为Severe Tropical Storm, 随后wind speed持续下降, 至消散前已回落至15m/s. 值得注意的是, 数据中最低气压字段缺失, 故仅依据wind speed判断Intensity变化.
与同名Typhoon 对比, 1987年的Alex (198707) 同样达到Typhoon 级别巅峰. 虽然1987 Typhoon 的具体wind speed数据未在本题提供, 但两者均被归类为“Typhoon ”等级, 表明“Alex”这一命名在历史上倾 toward at 产生具有中等以上Intensity的热带气旋. 1984年Alex从Nameless发展至Typhoon 历时约42h, 增强速度较快, 且在巅峰期维持了一定Time的Intensity, 显示出较好的组织结构和能量维持能力, 直至N上Go to 高The latitude冷海水区域后才迅速衰减.
| Time | The latitude | During | Intensity | Wind (m/s) | Pressure (hPa) | Moving toward |
|---|---|---|---|---|---|---|
| 1984-07-01 00:00:00 | 16.1°N | 124.5°E | Nameless | 15 | 1006 | |
| 1984-07-01 06:00:00 | 16.1°N | 124.2°E | Nameless | 15 | 1004 | |
| 1984-07-01 12:00:00 | 16.3°N | 124°E | Nameless | 17 | 1000 | |
| 1984-07-01 18:00:00 | 16.8°N | 123.8°E | Tropical Storm | 20 | 996 | |
| 1984-07-02 00:00:00 | 17.3°N | 123.6°E | Tropical Storm | 23 | 985 | |
| 1984-07-02 06:00:00 | 18.1°N | 123.3°E | Severe Tropical Storm | 28 | 985 | |
| 1984-07-02 12:00:00 | 19.3°N | 123°E | Severe Tropical Storm | 30 | 980 | |
| 1984-07-02 18:00:00 | 20.6°N | 122.2°E | Typhoon | 33 | 975 | |
| 1984-07-03 00:00:00 | 21.7°N | 121.6°E | Typhoon | 35 | 960 | |
| 1984-07-03 06:00:00 | 23.3°N | 121.5°E | Typhoon | 38 | 970 | |
| 1984-07-03 12:00:00 | 24.7°N | 121°E | Typhoon | 33 | 990 | |
| 1984-07-03 18:00:00 | 26.1°N | 120.9°E | Typhoon | 33 | 985 | |
| 1984-07-04 00:00:00 | 27.8°N | 121.2°E | Severe Tropical Storm | 30 | 990 | |
| 1984-07-04 06:00:00 | 29.6°N | 121.8°E | Severe Tropical Storm | 25 | 996 | |
| 1984-07-04 12:00:00 | 31.1°N | 122.6°E | Tropical Storm | 23 | 1000 | |
| 1984-07-04 18:00:00 | 32.8°N | 123.8°E | Tropical Storm | 20 | 1004 | |
| 1984-07-05 00:00:00 | 34°N | 125.1°E | Nameless | 17 | 1004 | |
| 1984-07-05 06:00:00 | 35.4°N | 127.2°E | Nameless | 15 | 1004 |
Typhoon Alex's international code is 198403, is 1984's 3rd Typhoon, international name ALEX.
Typhoon Alex peak intensity is Typhoon , max wind 38m/s, minimum central pressure 960 hPa.
According to records, Typhoon Alex is not in our coastal landfall.
TyphoonSays (taifengshuo.com) provides typhoon Alex's Track history map, multinational meteorological agency Forecast comparison, windshield range with IntensityTrend, page address: https://taifengshuo.com/typhoon/198403.
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