Typhoon Joan trajectory analysis
Track and Movement Characteristics
Typhoon Joan (199721) 的生命史始 at Northwest Pacific远洋海域, 整体路径呈现典型的“W行后转 toward NE”的抛物线形态. formed初期 (10月14日至16日) , 系统位 at 12.6°N至13.8°N的低纬度区域, 稳定 toward WMoving, 经度从164.1°E快速W移至154.6°E. 随后, 受大气环流引导气流变化影响, 路径逐渐由正W转为NW direction. 10月18日至20日期间, Typhoon 中心在15.9°N至20.9°N之间继续 toward NW推进, 并逼近137°E附近海域.
A critical turning point occurred around October 21. After its center moved beyond 23°N, its direction changed significantly, shifting from northwest to northeast and accelerating. From October 22 to 24, the typhoon rapidly moved away over the eastern ocean, with its longitude increasing from 139.3°E to 163°E and its latitude rising northward to around 29.5°N. Throughout its lifecycle, the typhoon did not make landfall and remained over the open ocean before weakening and dissipating in high-latitude waters.
Intensity evolution and historical comparison
Joan's intensity evolved through three phases: rapid intensification, a period of peak intensity, and gradual weakening. Starting as a tropical depression, the system rapidly intensified into a typhoon within 48h and reached its peak at 08:00 on October 18, with a minimum central pressure of 930hPa and maximum winds of 55m/s, earning a super typhoon rating. Notably, its peak intensity lasted about 60h, until 14:00 on October 20, with pressure and wind speed remaining highly stable, indicating an exceptionally stable structure. After October 21, its intensity began declining in stages as it moved northward and environmental conditions changed, until it weakened into a tropical depression on October 24.
In comparisons with previous typhoons of the same name, Joan's intensity in 1997 was particularly notable. Compared with the same-named systems in 1973, which reached severe tropical storm status with a pressure of 980hPa; 1964, which reached severe tropical storm status with a pressure of 998hPa; and 1962, which reached typhoon status with a pressure of 985hPa, Joan in 1997 had a lower peak pressure and stronger winds, placing it in the category of high-intensity typhoons. Although its intensity was below that of Joan in 1970, a super typhoon with a pressure of 901hPa, its minimum pressure of 930hPa still indicated a powerful tropical cyclone with significant destructive potential.
Typhoon Joan routes
| Time | Position | Intensity | Wind · Pressure | Move toward |
|---|
| 10-14 14:00 | 12.6°N
164.1°E | Tropical Depression | 12 m/s
1004 hPa | - |
| 10-15 02:00 | 13.1°N
162.6°E | Tropical Storm | 18 m/s
996 hPa | WNW |
| 10-15 14:00 | 13.3°N
160.6°E | Tropical Storm | 20 m/s
992 hPa | W |
| 10-16 02:00 | 13.4°N
158.5°E | Severe Tropical Storm | 28 m/s
985 hPa | W |
| 10-16 14:00 | 13.7°N
155.9°E | Typhoon | 35 m/s
970 hPa | W |
| 10-17 02:00 | 14°N
153.2°E | Severe Typhoon | 45 m/s
950 hPa | W |
| 10-17 14:00 | 14.6°N
150.1°E | Severe Typhoon | 50 m/s
940 hPa | W |
| 10-18 02:00 | 15.3°N
147.2°E | Super Typhoon | 55 m/s
930 hPa | WNW |
| 10-18 14:00 | 16.5°N
144.4°E | Super Typhoon | 55 m/s
930 hPa | WNW |
| 10-19 02:00 | 17.6°N
142°E | Super Typhoon | 55 m/s
930 hPa | WNW |
| 10-19 14:00 | 18.5°N
139.8°E | Super Typhoon | 55 m/s
930 hPa | WNW |
| 10-20 02:00 | 19.5°N
138.1°E | Super Typhoon | 55 m/s
930 hPa | NW |
| 10-20 14:00 | 20.9°N
137°E | Super Typhoon | 55 m/s
930 hPa | NNW |
| 10-21 02:00 | 22.2°N
136.6°E | Severe Typhoon | 50 m/s
935 hPa | N |
| 10-21 14:00 | 24.1°N
137.2°E | Severe Typhoon | 50 m/s
940 hPa | NNE |
| 10-22 02:00 | 25.9°N
139.3°E | Severe Typhoon | 45 m/s
950 hPa | NE |
| 10-22 14:00 | 26.4°N
142.3°E | Typhoon | 40 m/s
960 hPa | E |
| 10-23 02:00 | 27.1°N
146.3°E | Severe Tropical Storm | 30 m/s
980 hPa | ENE |
| 10-23 14:00 | 29.5°N
152.2°E | Severe Tropical Storm | 25 m/s
985 hPa | ENE |
| 10-24 02:00 | 29.9°N
158.3°E | Severe Tropical Storm | 25 m/s
985 hPa | E |
| 10-24 14:00 | 29.5°N
163°E | Tropical Depression | 15 m/s
998 hPa | E |
Sampled rows shown; all 41 track points are available on the interactive map or via the public API .
FAQ
Typhoon Joan is the 1997 Typhoon.
Typhoon Joan's international code is 199721, is 1997 number 21 Typhoon, international name JOAN.
What is the highest level of Typhoon Joan?
Typhoon Joan peak intensity is Super Typhoon, max wind 55m/s, minimum central pressure 930 hPa.
Is the typhoon Joan Landfall?
According to records, Typhoon Joan is not in our coastal Landfall.
Where can I view typhoon Joan's live track map?
TyphoonSays (taifengshuo.com) provides typhoon Joan's Track history map, multinational meteorological agency Forecast comparison, windshield range with IntensityTrend, page address: https://taifengshuo.com/typhoon/199721.
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