Typhoon Irma (197427) Track Archive

1974 Typhoon Past typhoons named Irma Typhoon archive

[Quick Archive Overview]Typhoon Irma (No. 197427, the historical number used before 1981) was a 1974 Northwest Pacific typhoon. It peaked as a severe typhoon, with maximum winds of 50 m/s and a minimum central pressure of 939 hPa. It did not make landfall in China, was numbered off on December 3, 1974, and had 45 recorded track points.

Numbering note: International numbering for the Northwest Pacific has been assigned by the JMA in Japan, the Tokyo Regional Specialized Meteorological Center, since 1981. This system did not exist in 1974. The number 197427 is the historical identifier retained by the CMA, and the numbers assigned that year by the JMA in Japan, the Joint Typhoon Warning Center in the United States, and China’s meteorological agencies may differ and cannot be compared directly.
Path. Data sources: China Meteorological Administration Tropical Cyclone Best Track Dataset (CMA-STI); wind speed refers to 2-min sustained wind speed. Track points at intermediate times are encrypted based on original operational positioning data, while wind speed and pressure are interpolated using best-track anchor points.

Show full fileHide full fileReview · Data table · FAQ · Related

Characteristics of Typhoon Irma

Path and Moving Characteristics

Typhoon Irma (197427) 的生命史始 at 1974年11月22日08时, formed at Northwest Pacific洋面 (10.3°N, 140.2°E) . 在初始阶段, 系统呈现明显的W行Trend, 从140.2°E迅速W移至135.4°E. 随着纬度缓慢N抬至15°N附近, 其Moving direction逐渐由正W转为WNW. 值得注意的是, 该Typhoon 在11月26日至27日期间, 纬度基本维持在15.5°N-15.7°N之间, 经度从131.7°E快速W进至125.4°E, 显示出在副热带高压S侧引导气流下的稳定W行特征. Go to S海后, 路径出现显著转折, 11月30日后逐渐转 toward NNE, 最终 at 12月3日08时在23.1°N, 115.9°E weakened into Tropical Depression并结束观测. 全生命周期长达11天, track points达45个, 且全程无Landfall记录, 属 at 典型的远洋及近海徘徊型Typhoon .

Intensity Evolution Analysis

该系统经历了完整的“ formed-增强-巅峰-减弱”过程. 初期发展迅速, 从Tropical Depression (10m/s) 仅用约30h便 intensified into Severe Tropical Storm (30m/s) , 并 at 11月24日达到Typhoon 级别 (40m/s) . 巅峰状态出现在11月26日20时至27日14时, 中心最低气压降至939hPa, max wind 达50m/s, 维持Severe TyphoonIntensity超过24h, 期间气压稳定在940hPa左右, 结构紧密. 然而, Go to S海W部海域后, 受环境因素影响, intensity 开始波动下降. 11月28日气压回升至975hPa, wind speed降至45m/s; 随后进一步 weakened into Severe Tropical Storm. 值得注意的是, 11月30日至12月1日期间, intensity 曾出现短暂反弹, 重新 intensified into Typhoon (35m/s, 975hPa) , 但随后迅速衰减, 至消散前已降为Tropical Depression.

Same-Name Comparison

在“Irma”这一命名序列中, 1974年的这次Typhoon Intensity表现突出. 相较 at 1993年 (巅峰Severe Tropical Storm, 990hPa) , 1988年 (巅峰Severe Tropical Storm, 985hPa) 以及1985年 (巅峰Typhoon , 957hPa) 的同名Typhoon , 1974年Irma的peak intensity (Severe Typhoon, 939hPa) 明显更强, 气压更低. 尽管1981年的同名Typhoon (198121) 曾达到Super Typhoon级别 (905hPa) , intensity 更为极端, 但1974年Irma仍属 at 该命名历史上Intensity第二强的Typhoon 系统, 显示出其在特定年份海洋热力条件下的显著发展潜力.

Typhoon Irma trajectory

Time	Position	Intensity	Wind · Pressure	Move toward
11-22 08:00	10.3°N 140.2°E	Tropical Depression	10 m/s 997 hPa	-
11-23 02:00	11.7°N 140°E	Tropical Depression	15 m/s 990 hPa	NW
11-23 20:00	13°N 137.7°E	Severe Tropical Storm	30 m/s 980 hPa	WNW
11-24 14:00	14.2°N 135.4°E	Typhoon	40 m/s 970 hPa	WNW
11-25 08:00	15.1°N 133.7°E	Typhoon	40 m/s 955 hPa	WNW
11-26 02:00	15.5°N 131.7°E	Severe Typhoon	45 m/s 945 hPa	W
11-26 20:00	15.7°N 129.2°E	Severe Typhoon	50 m/s 940 hPa	W
11-27 14:00	15.7°N 125.4°E	Severe Typhoon	50 m/s 940 hPa	W
11-28 08:00	15.6°N 121.6°E	Severe Typhoon	45 m/s 975 hPa	W
11-29 02:00	15.5°N 118.5°E	Severe Tropical Storm	30 m/s 985 hPa	W
11-29 20:00	15.7°N 115.3°E	Severe Tropical Storm	30 m/s 985 hPa	W
11-30 14:00	16.4°N 112.8°E	Typhoon	35 m/s 975 hPa	WNW
12-01 08:00	18.3°N 111.7°E	Severe Tropical Storm	30 m/s 975 hPa	NNW
12-02 02:00	21°N 112°E	Severe Tropical Storm	25 m/s 985 hPa	NNE
12-02 20:00	22.6°N 114°E	Tropical Depression	12 m/s 1000 hPa	ENE
12-03 08:00	23.1°N 115.9°E	Tropical Depression	9 m/s 1007 hPa	ENE

Sampled rows shown; all 45 track points are available on the interactive map or via the public API .

FAQ

Typhoon Irma was the 1974 Typhoon.

The number 197427 associated with Typhoon Irma is the historical identifier retained by the CMA for the 27th typhoon of 1974; its international name was IRMA. International numbering for the Northwest Pacific began in 1981. Before then, individual agencies maintained their own numbering systems, so the numbers assigned by the JMA in Japan, the Joint Typhoon Warning Center in the United States, and China’s meteorological agencies may differ and cannot be compared directly.

Where does Typhoon Irma’s track data come from?

Path. Data sources: China Meteorological Administration Tropical Cyclone Best Track Dataset (CMA-STI); wind speed refers to 2-min sustained wind speed. Track points at intermediate times are encrypted based on original operational positioning data, while wind speed and pressure are interpolated using best-track anchor points.

What is the most powerful typhoon Irma?

Typhoon Irma peak intensity is Severe Typhoon, max wind 50m/s, minimum central pressure 939 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/197427.

Track Typhoon

Find Information

Visit Community

Close at

Map Layers

Distance Calculator

Typhoon Bot