Typhoon Irma (197130) track archive

1971 Typhoon Past typhoons named Irma Typhoon archive

[Quick Archive Overview]Typhoon Irma (No.197130, the historical number used before 1981) was a 1971 Northwest Pacific typhoon. At peak intensity, it was a super typhoon, with max wind of 65m/s and a minimum central pressure of 884hPa. It did not make landfall in China, was numbered off on 1971-11-17, and had 38 recorded track points throughout its lifetime.

Numbering note: International uniform numbering in the Northwest Pacific is assigned by JMA (Japan), the Tokyo Regional Specialized Meteorological Center, beginning in 1981. This system did not exist in 1971. The number 197130 is the historical designation retained by the CMA. The numbers assigned that year by JMA (Japan), the USA Joint Typhoon Warning Center, and China's meteorological agencies may differ for the same typhoon and cannot be compared directly.
Track data sources: China Meteorological Administration Tropical Cyclone Best Track Dataset (CMA-STI); wind speeds are 2-minute sustained wind speeds.

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Characteristics of Typhoon Irma

Path and Moving Characteristics

Typhoon Irma (197130) at 1971年11月8日在Northwest Pacific低纬度海域 formed, 初始Position位 at lat 7°N, 142.6°附近. 其生命史全程未Landfall任何land, 主要活动区域为开阔洋面. 从路径坐标序列分析, 该Typhoon 整体呈现典型的“NW行-转 toward NE”的抛物线型路径. formed初期, 系统 toward NW direction稳定Moving, 纬度从7°N迅速攀升至18.6°N, 经度则由142.6°EW移至128.4°E, 显示出受副热带高压S侧引导气流影响的显著特征.

The key turning point in its track occurred from November 12 to 13. When the center reached its westernmost position near lat 18.6°N, 128.4°E, the typhoon attained its farthest westward extent. Its direction then gradually shifted from northwest to north-northeast, and after November 15 it accelerated toward the northeast until it weakened and dissipated near lng 174.4° on November 17. This large-scale turn was consistent with the influence of pre-trough flow in the mid-latitude westerlies on the typhoon track, causing the system to move rapidly eastward away from the Asian continent after reaching higher latitudes.

Intensity evolution and historical comparison

Irma的Intensity演变经历了快速增强, 巅峰维持及缓慢减弱三个阶段. 从11月8日的Tropical Depression (12m/s, 1005hPa) 起步, 系统在4天内迅速加强. 特别是在11月10日至12日期间, Pressure从965hPa急剧下降至884hPa, max wind 飙升至65m/s, 确立其Super Typhoon地位. 这一爆发式增强过程显示了极佳的热力条件. 巅峰状态维持约24h后, 随着纬度升高和海温降低, intensity 开始波动下降, 但直至11月14日仍保持55m/s的Super TyphoonIntensity. Go to 高纬度后, 受垂直风切变增大影响, 系统迅速减弱, at 11月17日降级为Tropical Depression.

Compared with previous typhoons of the same name, the 1971 Irma was exceptionally intense. Its minimum pressure of 884hPa was far lower than that of Irma in 1981 (905hPa), Irma in 1985 (957hPa), and the severe tropical storm records from 1988 and 1993. As a super typhoon that formed in late autumn 1971, its peak intensity ranked first among cyclones of the same name in history, demonstrating a rare process of energy accumulation and release.

Typhoon Irma trajectory

Time	Position	Intensity	Wind · Pressure	Move toward
11-08 08:00	7°N 142.6°E	Tropical Depression	12 m/s 1005 hPa	-
11-08 20:00	7.4°N 142.7°E	Tropical Depression	15 m/s 1000 hPa	WNW
11-09 08:00	8.3°N 141.6°E	Severe Tropical Storm	30 m/s 995 hPa	NNW
11-09 20:00	8.6°N 141.4°E	Severe Tropical Storm	30 m/s 983 hPa	N
11-10 08:00	10.1°N 140.2°E	Severe Tropical Storm	30 m/s 983 hPa	NW
11-10 20:00	12.2°N 138.3°E	Typhoon	35 m/s 981 hPa	NW
11-11 08:00	13.8°N 135.8°E	Typhoon	40 m/s 965 hPa	WNW
11-11 20:00	15°N 132.9°E	Severe Typhoon	50 m/s 910 hPa	WNW
11-12 08:00	16.9°N 130.2°E	Super Typhoon	65 m/s 890 hPa	NW
11-12 20:00	18.6°N 128.4°E	Super Typhoon	65 m/s 895 hPa	NW
11-13 08:00	20°N 127.5°E	Super Typhoon	60 m/s 920 hPa	NNW
11-13 20:00	21.6°N 126.9°E	Super Typhoon	55 m/s 938 hPa	NNW
11-14 08:00	23.4°N 127.2°E	Super Typhoon	55 m/s 950 hPa	NNE
11-14 20:00	25.6°N 128.5°E	Severe Typhoon	50 m/s 960 hPa	NNE
11-15 08:00	27.6°N 132°E	Severe Typhoon	50 m/s 965 hPa	ENE
11-15 20:00	30.9°N 138.1°E	Severe Typhoon	45 m/s 967 hPa	ENE
11-16 08:00	31.8°N 145.5°E	Typhoon	35 m/s 980 hPa	E
11-16 20:00	32.1°N 157.1°E	Tropical Storm	20 m/s 994 hPa	E
11-17 08:00	31°N 167.8°E	Tropical Depression	15 m/s 1000 hPa	E
11-17 14:00	31.2°N 174.4°E	Tropical Depression	15 m/s 1002 hPa	E

Sampled rows shown; all 38 track points are available on the interactive map or via the public API .

FAQ

Typhoon Irma was the first Typhoon of 1971.

The designation 197130 for Typhoon Irma is the historical number retained by the CMA. It was the 30th typhoon of 1971, while its international name was IRMA. International uniform numbering in the Northwest Pacific did not begin until 1981. Before then, each agency used its own numbering system, so the numbers assigned by JMA (Japan), the USA Joint Typhoon Warning Center, and China's meteorological agencies for the same typhoon may differ and cannot be compared directly.

Where does Typhoon Irma’s track data come from?

Track data sources: China Meteorological Administration Tropical Cyclone Best Track Dataset (CMA-STI); wind speeds are 2-minute sustained wind speeds.

What is the most powerful typhoon Irma?

Typhoon Irma peak intensity is Super Typhoon, max wind 65m/s, minimum central pressure 884 hPa.

Is there a Typhoon Irma Landfall?

According to records, Typhoon Irma is not in our coastal landfall.

Where can I view typhoon Irma's live track map?

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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