The SummaryTyphoon Irma (international code 198505) is a 1985 Northwest Pacific typhoon; peak intensity Severe Typhoon, max wind 46m/s, minimum central pressure 960hPa, was numbered off, recorded 28 track points.
Typhoon Irma, international code 198505, international name IRMA, 1985 Northwest Pacific typhoon. Formed: 1985-06-24 12:00:00, ended: 1985-07-01 06:00:00. Peak intensity: Severe Typhoon, minimum central pressure: 960 hPa, max wind: 46m/s.
Typhoon Irma at 1985-06-24 12:00:00 at 8.1°N, 135.9°E over the Northwest Pacific; initial intensity: Nameless.
It peaked at Severe Typhoon intensity with max winds of 46 m/s (~166 km/h) and a minimum central pressure of 960hPa, recorded at 1985-06-29 00:00:00.
1985-07-01 06:00:00 After, Typhoon Irma gradually weakened and was numbered off on 1985-07-01 06:00:00 was numbered off; its lifecycle recorded 28 track points.
Typhoon Irma (198505) 的生命史始 at Northwest Pacific远洋海域, 整体路径呈现典型的“NW-转 toward NE”抛物线形态. formed初期 (6月24日至26日) , 系统自Philippines以E洋面 (135.9°E附近) toward NW direction稳定Moving, The latitude从8.1°N迅速N抬至13.1°N, DuringW移约5个经纬度, 显示其受副热带高压S侧E气流引导显著. 6月27日至28日期间, Moving direction逐渐转为正N, 经度维持在129.7°E至130.2°E之间窄幅波动, 表明引导气流发生转变, 系统Go to 转 toward 前的关键过渡期.
6月29日后, Typhoon 完成转 toward , 路径折 toward NE direction加速Moving. 从29日00时的24.4°N/130.1°E至7月1日06时的40.1°N/146.5°E, 系统在约54h内 toward N跨越近16个The latitude, toward E跨越超过16个During. 这种高纬度的快速NE toward 移出, 符合中纬度W风带槽前气流牵引的特征. 全生命周期内, 该Typhoon 未Landfall任何陆地, 始终在海上活动, 最终在Japan以E海域转化为温带气旋或消散.
在Intensity变化方面, Irma经历了完整的“ formed-增强-巅峰-减弱”过程. 从6月24日的Nameless (12m/s) 起步, 系统在48h内迅速 intensified into Severe Tropical Storm. 6月27日中午, wind speed达到38m/s, 正式升级为Typhoon 等级. 随后Intensity继续攀升, at 6月29日00时达到巅峰状态, max wind 录得46m/s, 定性为Severe Typhoon. 巅峰维持Time较短, 仅约12h后, 随着The latitude升高和海温降低, 中心wind speed开始回落. 6月30日后, 系统虽仍维持Typhoon 级Intensity (38m/s) , 但结构逐渐松散, 至7月1日清晨 weakened into Severe Tropical Storm (28m/s) .
与历届同名Typhoon 相比, 1985年Irma的Intensity表现较为突出. 其peak intensity (Severe Typhoon, 46m/s) 明显高 at 1993年及1988年的同名Typhoon (均为Severe Tropical Storm级别) , 也强 at 1978年的Typhoon 级Irma. 然而, 相较 at 1981年达到Super Typhoon级别的同名系统, 1985年Irma的peak intensity略逊一筹. 总体而言, 这是一次在远洋发展成熟, Intensity较强但未造成直接Landfall影响的典型Typhoon 过程.
| Time | The latitude | During | Intensity | Wind (m/s) | Pressure (hPa) | Moving toward |
|---|---|---|---|---|---|---|
| 1985-06-24 12:00:00 | 8.1°N | 135.9°E | Nameless | 12 | 1002 | |
| 1985-06-25 00:00:00 | 9.4°N | 134°E | Tropical Storm | 20 | 998 | |
| 1985-06-25 12:00:00 | 10.4°N | 132.5°E | Severe Tropical Storm | 25 | 990 | |
| 1985-06-26 00:00:00 | 11.5°N | 131.5°E | Severe Tropical Storm | 30 | 990 | |
| 1985-06-26 12:00:00 | 13.1°N | 130.6°E | Severe Tropical Storm | 30 | 990 | |
| 1985-06-27 00:00:00 | 14.9°N | 130.2°E | Severe Tropical Storm | 30 | 990 | |
| 1985-06-27 12:00:00 | 16.7°N | 129.7°E | Typhoon | 38 | 980 | |
| 1985-06-28 00:00:00 | 18.8°N | 129.7°E | Typhoon | 38 | 965 | |
| 1985-06-28 12:00:00 | 21.3°N | 129.9°E | Typhoon | 41 | 960 | |
| 1985-06-29 00:00:00 | 24.4°N | 130.1°E | Severe Typhoon | 46 | 960 | |
| 1985-06-29 12:00:00 | 27°N | 130.5°E | Severe Typhoon | 43 | 960 | |
| 1985-06-30 00:00:00 | 29.4°N | 131.9°E | Typhoon | 38 | 965 | |
| 1985-06-30 12:00:00 | 32.4°N | 135.5°E | Typhoon | 38 | 965 | |
| 1985-07-01 00:00:00 | 37.7°N | 142.5°E | Severe Tropical Storm | 30 | 972 | |
| 1985-07-01 06:00:00 | 40.1°N | 146.5°E | Severe Tropical Storm | 28 | - |
Sampled rows shown; all 28 track points are available on the interactive map or via the public API .
Typhoon Irma’s international code is 198505, typhoon number 5 of 1985, international name IRMA.
Typhoon Irma peak intensity is Severe Typhoon, max wind 46m/s, minimum central pressure 960 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/198505.
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