The SummaryTyphoon Opal (international code 197017) is a 1970 Northwest Pacific typhoon; peak intensity Severe Tropical Storm, max wind 25m/s, minimum central pressure 990hPa, not in China Landfall, 1970-11-17 was numbered off, recording 14 track points.
Typhoon Opal, international code 197017, international name OPAL, 1970 Northwest Pacific typhoon. Formed: 1970-11-14 00:00:00, ended: 1970-11-17 06:00:00. Peak intensity: Severe Tropical Storm, minimum central pressure: 990 hPa, max wind: 25m/s.
Typhoon Opal at 1970-11-14 00:00:00 at 15.1°N, 118.2°E over the Northwest Pacific; initial intensity: Nameless.
It peaked at Severe Tropical Storm intensity with max winds of 25 m/s (~90 km/h) and a minimum central pressure of 990hPa, recorded at 1970-11-15 12:00:00.
1970-11-17 06:00:00 After, Typhoon Opal gradually weakened and was numbered off on 1970-11-17 06:00:00 was numbered off; its lifecycle recorded 14 track points.
Typhoon Opal (197017)'s life history is short, from formed to dispersed for about 3 and a half days. Its overall path presents a stable SW toward MovingTrend, with no apparent turn toward or twisting phenomenon. In the initial phase, the system position at the Philippines to E area (15.1°N, 118.2°E) , then continues toward WS direction through the central sea of Vietnam. During the Moving process, the latitude gradually decreases from lat 15.1 degrees to lat 9.4 degrees, the length from lng 118.2 degrees W to lng 107.9 degrees, the horizontal displacement is greater. It is worth noting that the Typhoon's full-range no-Land record, continues on the open ocean, eventually weakens
Opal的Intensity变化经历了“快速增强—巅峰维持—逐渐减弱”的典型过程. formed初期为Nameless, wind speed12m/s; 在随后的18h内迅速加强, at 11月14日12时升级为Tropical Storm, 并在11月15日12时达到peak intensity, 定为Severe Tropical Storm, max wind 达25m/s. 巅峰状态维持Time较短, 仅约6h后, 自11月15日18时起开始减弱, 重新回落至Tropical Storm等级. 此后, 随着系统 toward SMoving, 环境条件可能趋 at 不利, intensity 持续衰减, at 11月16日18时降级为Nameless, 直至最终消散. 整个过程中, 气压数据缺失, 但wind speed变化清晰反映了其生命周期的能量收支状况.
Compared to other years of the same name Typhoon, 1967 Opel had reached Super Typhoon level, 1997 and 1973 Opel also reached Severe Typhoon and Typhoon level, both significantly strong at 1970 Severe Tropical Storm peak intensity. only 1976 Opal peak intensity is Nameless, weak at this process.
| Time | The latitude | During | Intensity | Wind (m/s) | Pressure (hPa) | Moving toward |
|---|---|---|---|---|---|---|
| 1970-11-14 00:00:00 | 15.1°N | 118.2°E | Nameless | 12 | 1006 | |
| 1970-11-14 06:00:00 | 15.4°N | 117.3°E | Nameless | 17 | 1004 | |
| 1970-11-14 12:00:00 | 15.6°N | 116.3°E | Tropical Storm | 20 | 996 | |
| 1970-11-14 18:00:00 | 15.7°N | 115.3°E | Tropical Storm | 23 | 994 | |
| 1970-11-15 00:00:00 | 15.5°N | 114.5°E | Tropical Storm | 23 | 992 | |
| 1970-11-15 06:00:00 | 15.2°N | 114.1°E | Tropical Storm | 23 | 990 | |
| 1970-11-15 12:00:00 | 14.7°N | 113.2°E | Severe Tropical Storm | 25 | 990 | |
| 1970-11-15 18:00:00 | 14.3°N | 112.5°E | Tropical Storm | 23 | 998 | |
| 1970-11-16 00:00:00 | 13.7°N | 111.9°E | Tropical Storm | 23 | 1000 | |
| 1970-11-16 06:00:00 | 12.8°N | 111.4°E | Tropical Storm | 23 | 1000 | |
| 1970-11-16 12:00:00 | 11.8°N | 110.8°E | Tropical Storm | 20 | 1000 | |
| 1970-11-16 18:00:00 | 10.8°N | 110.2°E | Nameless | 17 | 1002 | |
| 1970-11-17 00:00:00 | 9.9°N | 109.1°E | Nameless | 17 | 1002 | |
| 1970-11-17 06:00:00 | 9.4°N | 107.9°E | Nameless | 12 | 1004 |
Typhoon Opal's international code is 197017, is 1970's 17th Typhoon, international name OPAL.
Typhoon Opal peak intensity is Severe Tropical Storm, max wind 25m/s, minimum central pressure 990 hPa.
According to records, Typhoon Opal is not in our coastal landfall.
TyphoonSays (taifengshuo.com) provides typhoon Opal's Track history map, multinational meteorological agency Forecast comparison, wind range with IntensityTrend, page address: https://taifengshuo.com/typhoon/197017.
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