Overall Green Tropical Cyclone for LAN-23
in Japan

Event summary

Tropical Cyclone LAN-23 can have a low humanitarian impact based on the maximum sustained wind speed, exposed population and vulnerability.

GDACS ID TC 1000990
Name LAN-23
From - To 07 Aug - 17 Aug
Exposed countries Japan
Exposed population 17.5 million in Category 1 or higher
Maximum wind speed 213 km/h Category 4
Maximum storm surge 0.8 m (15 Aug 08:00 UTC)
Vulnerability Low (Japan)

GDACS Score

For more info on GDACS alert score click here.
Wind Storm surge Rainfall GDACS score
GDACS JTWC 213 km/h 0.8 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 223 km/h 1.2 m 1018 mm 0.5
GFS 151 km/h 2.9 m 814 mm 0.5
ECMWF 119 km/h 1.5 m 721 mm 0.5
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Japan - Tropical Cyclone LAN (ECHO 16 Aug 2023)Wed, 16 Aug 2023 09:56

  • Tropical cyclone LAN passed over central-western Honshu Island (Japan’s largest island) on 14 August and continuing in the morning of 15 August (UTC) as a tropical storm, moving northward over the Sea of Japan. On 16 August at 0.00 UTC, its centre was located approximately 260 km north of the coast of Kyoto Prefecture (central Honshu), with maximum sustained winds of 83 km/h (tropical storm).
  • According to the Japan Fire and Disaster Management Agency, 49 people were injured and 37 houses damaged across western Japan. Around 182,000 people were advised to evacuate or seek shelter. On Tuesday, all flights from Chubu, Kansai, and Nagoya airports were cancelled. Train services between Nagoya and Okayama have been halted.
  • LAN is forecast to continue moving north-eastward over the Sea of Japan and it is expected to pass close to northern Hokkaido Island, northern Japan, on 17 August in the morning (UTC), as a tropical storm.
  • Over the next 24 hours, very heavy rainfall, strong winds and storm surges are forecast over central and western Honshu Island.
Japan - Tropical Cyclone LAN, update (ECHO 17 Aug 2023)Thu, 17 Aug 2023 09:10

  • Tropical cyclone LAN continued moving north-northeastward over the Sea of Japan, well off the coast of northern Honshu Island (the main island of Japan) on 16 August, further weakening. On 17 August at 0.00 UTC, its centre was located over the Sea of Japan approximately 215 km north-west of Sapporo City, northern Japan, with maximum sustained winds of 74 km/h (tropical storm).
  • Media report, as of 17 August, 64 injured people across nine Prefectures in central Honshu (where the worst affected Prefectures are Hyogo and Osaka) and up to 305 000 power outages across the affected area in central Honshu Island.
  • On the forecast track, LAN is forecast to continue moving northeastward over the northern Sea of Japan, further weakening and dissipating on 17-18 August.
  • Over the next 48 hours, more rainfall is forecast over the whole Honshu Island and most of the Hokkaido Island.
Detailed event map. European Union, 2026. 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)

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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 (40), WMO (1), INFORM (2), (1),