Overall Green alert Tropical Cyclone for JANGMI-20
in Republic of Korea, Japan, Russian Federation

Event summary

Tropical Cyclone JANGMI-20 can have a low humanitarian impact based on the maximum sustained wind speed, exposed population and vulnerability.

GDACS ID TC 1000690
Name JANGMI-20
From - To 08 Aug - 10 Aug
Exposed countries Republic of Korea, Japan, Russian Federation
Exposed population No people in Category 1 or higher
Maximum wind speed 74 km/h Tropical storm
Maximum storm surge 1.1 m (09 Aug 19:00 UTC)
Vulnerability Low (Japan)

GDACS Score

For more info on GDACS alert score click here.
Wind Storm surge Rainfall GDACS score
GDACS JTWC 65 km/h 1.1 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 104 km/h 1 m 298 mm 0.5
GFS 126 km/h 1.5 m 394 mm 0.5
ECMWF 79 km/h 0.7 m 437 mm 0.5
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Japan, Korean Peninsula - Tropical Cyclone JANGMI (ECHO 10 Aug 2020)Mon, 10 Aug 2020 13:04

  • A new tropical cyclone named JANGMI formed over the western Philippine Sea on 8 August and started moving north towards the Ryukyu Islands (southern Japan) and the East China Sea. On 10 August at 0.00 UTC, its centre was located over the Korea Strait approximately 95 km south-west of Fukue Island (Nagasaki Prefecture, southern Japan), and approximately 355 km south-west of Busan City (southeastern Republic of Korea), with maximum sustained winds up to 75 km/h.
  • JANGMI is forecast to pass very close to Busan on 10 August in the morning (UTC), with maximum sustained winds up to 75 km/h. Later, it is expected to continue moving north-east over the Sea of Japan, and could reach the northern Hokkaido coast (Japan) on 11 August in the morning (UTC), with maximum sustained winds up to 65 km/h.
  • Over the next 24 hours, heavy rainfall is forecast over the Republic of Korea, and southern Japan. Very heavy rainfall is forecast over northern Republic of Korea and southern Democratic People's Republic of Korea. JMA has issued a red warning for storm and high waves over Fukue, and northern Kyushu Islands.
Japan, Korean Peninsula - Tropical Cyclone JANGMI update (ECHO 11 Aug 2020)Tue, 11 Aug 2020 13:05

  • Tropical cyclone JANGMI passed very close to Busan and Ulsan Cities (southeastern coastal area of the Republic of Korea) on 10 August early in the morning (UTC), as a tropical storm, with maximum sustained winds up to 65 km/h, and continued moving north-east over the Sea of Japan on 10 August in the afternoon (UTC), weakening. On 11 August at 0.00 UTC, its centre was located over the sea approximately 315 km west of western Hokkaido Island (northern Japan), as an extra-tropical low.
  • Media report, as of 11 August, flights and ferries disruptions between Jeiu Island and the southern Republic of Korea mainland.
  • Over the next 24 hours, heavy rainfall is forecast over southern Republic of Korea, as well as over northern Honshu, and western Hokkaido Islands (Japan). Very heavy rainfall is forecast over northern Republic of Korea, and southern Democratic People's Republic of Korea. JMA has issued a red warning for storm over north-western Hokkaido.
Detailed event map. European Union, 2024. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

Latest media headlines

Articles: 278 | About casualties: 44 | Last hour: 0

NASA finds Jangmi now an Extra-Tropical StormWed, 12 Aug 2020 16:39:00 +0200.

NASA’s Aqua satellite obtained a visible image of Tropical Storm Jangmi after it transitioned into an extra-tropical storm. The Joint Typhoon Warning Center (JTWC) posted its final bulletin on Tropical Storm Jangmi on Aug. 10 at 11 a.m. EDT
...(more)
NASA finds Jangmi now an Extra-Tropical StormTue, 11 Aug 2020 17:24:00 +0200.

Credit: Image Courtesy: NASA Worldview, Earth Observing System Data and Information System (EOSDIS). NASA's Aqua satellite obtained a visible image of Tropical Storm Jangmi after it transitioned into an extra-tropical storm. The Joint Typho
...(more)
Typhoon Jangmi DissipatesTue, 11 Aug 2020 05:48:00 +0200.

Typhoon Jangmi, this year's fifth, died without causing serious damage in Korea on Monday. A typhoon alert was lifted at 1 p.m. for Jeju Island, where Jangmi had made landfall. Heavy rainstorms still hit Busan and South Gyeongsang Province,
...(more)
As Typhoon Jangmi dissipates, more downpours expected overnight [PHOTO ... Tue, 11 Aug 2020 05:09:00 +0200.

Typhoon Jangmi dissipated on Monday afternoon after it passed through the southeastern tip of South Korea, leaving limited damage, the national weather agency said. But torrential rains are likely to continue in some parts of the country in
...(more)

View more news

Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (38), (2), WMO (1), INFORM (2),