The SummaryTyphoon Irma (international code 197130) is a 1971 Northwest Pacific typhoon; peak intensity Super Typhoon, max wind 79m/s, minimum central pressure 885hPa, not in China Landfall, 1971-11-15 was numbered off, recording 31 track points.
Typhoon Irma, international code 197130, international name IRMA, 1971 Northwest Pacific typhoon. Formed: 1971-11-08 00:00:00, ended: 1971-11-15 12:00:00. Peak intensity: Super Typhoon, minimum central pressure: 885 hPa, max wind: 79m/s.
Typhoon Irma at 1971-11-08 00:00:00 at 6.9°N, 142.6°E over the Northwest Pacific; initial intensity: Nameless.
It peaked at Super Typhoon intensity with max winds of 79 m/s (~284 km/h) and a minimum central pressure of 885hPa, recorded at 1971-11-11 18:00:00.
1971-11-15 12:00:00 After, Typhoon Irma gradually weakened and was numbered off on 1971-11-15 12:00:00 was numbered off; its lifecycle recorded 31 track points.
Typhoon Irma (197130) formed at Northwest Pacific低The latitude海域, 初始Position位 at 6.9°N, 142.6°E. 在生命史初期, 系统呈现缓慢的W移Trend, 从11月8日至9日, 其During由142.6°EW移至141.4°E, 纬度略有N抬. 随后, 受大气环流引导, Typhoon 转 toward NW, Moving速度显著加快. 11月10日至12日期间, 系统沿NW路径快速穿越Philippines以E洋面, 经度从140.3°E迅速W进至130.3°E, 纬度同步N抬至16.9°N.
After reaching near 127.5°E, the system Moving direction gradually shifted from NW to NE. On November 14 to 15, the Typhoon accelerated toward NE direction, moving the length from 127°E to 138°E, and the latitude jumped from 23.2°NN to 30.7°N, eventually weakening dispersion in the high latitude waters.
Irma的Intensity演变呈现出典型的“快速增强-巅峰维持-逐渐减弱”特征. 系统从Nameless起步, at 11月10日 intensified into Typhoon 级别 (33m/s) . 随后Go to 爆发性增强期, 仅在48h内, max wind 从33m/s激增至79m/s, at 11月12日00:00达到Super Typhoonpeak intensity. 此后, 虽然Intensity有所波动, 但在11月12日至14日期间, 其中心附近Max Wind始终维持在51m/s以上, 保持了长达近三天的Super Typhoon或Severe Typhoon级别Intensity. 11月14日后, 随着The latitude升高及环境条件变化, intensity 开始稳步下降, 直至消散前仍保持Typhoon 级别 (33m/s) .
与历届同名Typhoon 相比, 1971年Irma的Intensity极为突出. 其巅峰wind speed高达79m/s, 远超1993年, 1988年及1985年的同名Typhoon (后者巅峰仅为Severe Tropical Storm或Severe Typhoon级别) . 即便与同样达到Super Typhoon级别的1981年Irma相比, 1971年系统在低The latitude海域的快速增强能力及peak intensity的绝对值均显示出极强的能量释放特征, 是当年Northwest Pacific海域极具代表性的Severe Typhoon过程.
| Time | The latitude | During | Intensity | Wind (m/s) | Pressure (hPa) | Moving toward |
|---|---|---|---|---|---|---|
| 1971-11-08 00:00:00 | 6.9°N | 142.6°E | Nameless | 15 | 1000 | |
| 1971-11-08 12:00:00 | 7.4°N | 142.6°E | Nameless | 17 | 994 | |
| 1971-11-09 00:00:00 | 8.2°N | 141.6°E | Severe Tropical Storm | 25 | 994 | |
| 1971-11-09 12:00:00 | 8.6°N | 141.4°E | Severe Tropical Storm | 28 | 980 | |
| 1971-11-10 00:00:00 | 10.1°N | 140.3°E | Typhoon | 33 | 985 | |
| 1971-11-10 12:00:00 | 12.3°N | 138.3°E | Typhoon | 33 | 980 | |
| 1971-11-11 00:00:00 | 13.8°N | 135.6°E | Typhoon | 41 | 965 | |
| 1971-11-11 12:00:00 | 15.1°N | 132.9°E | Super Typhoon | 66 | 910 | |
| 1971-11-12 00:00:00 | 16.9°N | 130.3°E | Super Typhoon | 79 | 890 | |
| 1971-11-12 12:00:00 | 18.8°N | 128.4°E | Super Typhoon | 74 | 905 | |
| 1971-11-13 00:00:00 | 20.1°N | 127.5°E | Super Typhoon | 64 | 925 | |
| 1971-11-13 12:00:00 | 21.6°N | 126.9°E | Super Typhoon | 56 | 940 | |
| 1971-11-14 00:00:00 | 23.2°N | 127°E | Super Typhoon | 51 | 950 | |
| 1971-11-14 12:00:00 | 25.4°N | 128.3°E | Severe Typhoon | 46 | 960 | |
| 1971-11-15 00:00:00 | 27.6°N | 131.8°E | Typhoon | 41 | 965 | |
| 1971-11-15 12:00:00 | 30.7°N | 138°E | Typhoon | 33 | 970 |
Sampled rows shown; all 31 track points are available on the interactive map or via the public API .
Typhoon Irma’s international code is 197130, typhoon number 30 of 1971, international name IRMA.
Typhoon Irma peak intensity is Super Typhoon, max wind 79m/s, minimum central pressure 885 hPa.
According to records, Typhoon Irma is not in our coastal landfall.
TyphoonSays (taifengshuo.com) provides typhoon Irma's Track history map, multinational meteorological agency Forecast comparison, wind range with IntensityTrend, page address: https://taifengshuo.com/typhoon/197130.
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