The SummaryTyphoon Alex (international code 198707) is a 1987 Northwest Pacific typhoon; peak intensity Typhoon, max wind 33m/s, minimum central pressure 970hPa, not in China Landfall, 1987-07-30 was numbered off, recorded 38 track points.
Typhoon Alex, international code 198707, international name ALEX, 1987 Northwest Pacific typhoon. Formed: 1987-07-21 00:00:00, ended: 1987-07-30 06:00:00. Peak intensity: Typhoon , minimum central pressure: 970 hPa, max wind: 33m/s.
Typhoon Alex at 1987-07-21 00:00:00 at 8.5°N, 144°E over the Northwest Pacific; initial intensity: Nameless.
It peaked at Typhoon intensity with max winds of 33 m/s (~119 km/h) and a minimum central pressure of 970hPa, recorded at 1987-07-25 12:00:00.
1987-07-30 06:00:00 After, Typhoon Alex gradually weakened and was numbered off on 1987-07-30 06:00:00 was numbered off; its lifecycle recorded 38 track points.
Typhoon Alex (198707) 的生命史始 at Northwest Pacific远洋海域, 整体路径呈现典型的“NW行—N抬—NE转 toward ”的抛物线形态. formed初期 (7月21日至23日) , 系统位 at 低The latitude洋面 (8.5°N-10.6°N) , 受引导气流影响稳定 toward NW, During从144°E快速W移至132.9°E. 7月24日至25日, 随着纬度提升至12.7°N以上, 路径逐渐由纯NW toward 转为N direction, 并在接近Taiwan以E洋面时达到最W端Position (121.7°N附近) .
It is noteworthy that the Typhoon has no landfall records. after July 26, the system center length changes slowed down and then began to move E, indicating that it completed the critical turn toward process at 21° to 25°. after July 27, the path clearly twisted toward NE, crossing E Sea N to the Yellow Sea and Japan Sea region, and eventually at July 30 in the High Latitude Sea (39.1° N) dispersed.
From the perspective of the Intensity evolution, Alex experienced a complete and symmetrical life cycle. the systemined the Nameless level within the first 72h after formed, wind speedined at 10-17m/s. On July 24, at 00, with the center near Max Wind increased to 23m/s, the system upgraded to Tropical Storm, and in the following 36h rapidly enhanced. On July 25, at 12th, wind speed reached a peak of 33m/s, established as Typhoon level, and on this Intensityined about 18h. Then, influenced by the high latitude environment and possible vertical wind shifts, the intensity began to weaken steadily, on July 27, down to Severe Tropical Storm, and on July 28, further weakened into Nameless, until the end of life.
Compared with the same name typhoon, the 3rd typhoon Alexpeak intensity in 1984 is also typhoon level. although both reached typhoon grade, but in 1987 Alex's Max Wind is clearly recorded as 33m/s. by at the data lacks the specific minimum air pressure value, can only be judged by wind speed, in 1987 Alex belongs to the typhoon system at medium intensity, its intensity eruption period is shorter, mainly concentrated in the upward toward phase, then in the high latitude region rapid decline, reflecting the significant destructive effect of the middle latitude W wind belt on the tropical spiral structure.
| Time | The latitude | During | Intensity | Wind (m/s) | Pressure (hPa) | Moving toward |
|---|---|---|---|---|---|---|
| 1987-07-21 00:00:00 | 8.5°N | 144°E | Nameless | 10 | - | |
| 1987-07-21 12:00:00 | 8.9°N | 141.8°E | Nameless | 10 | 1008 | |
| 1987-07-22 00:00:00 | 9.3°N | 139.6°E | Nameless | 10 | 1008 | |
| 1987-07-22 12:00:00 | 9.8°N | 137.3°E | Nameless | 12 | 1006 | |
| 1987-07-23 00:00:00 | 10.3°N | 134.4°E | Nameless | 15 | 1002 | |
| 1987-07-23 12:00:00 | 10.9°N | 131.3°E | Nameless | 17 | 998 | |
| 1987-07-24 00:00:00 | 12.7°N | 129.3°E | Tropical Storm | 23 | 994 | |
| 1987-07-24 12:00:00 | 14.9°N | 128.1°E | Severe Tropical Storm | 28 | 990 | |
| 1987-07-25 00:00:00 | 16.5°N | 126°E | Severe Tropical Storm | 30 | 980 | |
| 1987-07-25 12:00:00 | 18.4°N | 124.4°E | Typhoon | 33 | 970 | |
| 1987-07-26 00:00:00 | 20.3°N | 123°E | Typhoon | 33 | 970 | |
| 1987-07-26 12:00:00 | 22.6°N | 122.3°E | Typhoon | 33 | 970 | |
| 1987-07-27 00:00:00 | 25.2°N | 121.7°E | Severe Tropical Storm | 30 | 975 | |
| 1987-07-27 12:00:00 | 27.8°N | 120.7°E | Severe Tropical Storm | 28 | 985 | |
| 1987-07-28 00:00:00 | 30.7°N | 120.8°E | Tropical Storm | 20 | 992 | |
| 1987-07-28 12:00:00 | 33.6°N | 121.3°E | Nameless | 12 | 992 | |
| 1987-07-29 00:00:00 | 35.8°N | 121.7°E | Nameless | 12 | 994 | |
| 1987-07-29 12:00:00 | 37.6°N | 122.8°E | Nameless | 10 | 996 | |
| 1987-07-30 00:00:00 | 38.6°N | 123.9°E | Nameless | 7 | 998 | |
| 1987-07-30 06:00:00 | 39.1°N | 124.4°E | Nameless | 7 | - |
Sampled rows shown; all 38 track points are available on the interactive map or via the public API .
Typhoon Alex's international code is 198707, is 1987 Typehoon number 7, international name ALEX.
Typhoon Alex peak intensity is Typhoon , max wind 33m/s, minimum central pressure 970 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/198707.
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