Overall Green alert Tropical Cyclone for CHAN-HOM-20
in Japan

Event summary

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

GDACS ID TC 1000727
Name CHAN-HOM-20
From - To 04 Oct - 12 Oct
Exposed countries Japan
Exposed population No people in Category 1 or higher
Maximum wind speed 148 km/h Category 1
Maximum storm surge 0.4 m (09 Oct 04:00 UTC)
Vulnerability Low (Japan)

GDACS Score

For more info on GDACS alert score click here.
Wind Storm surge Rainfall GDACS score
GDACS JTWC 46 km/h 0.4 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 187 km/h 1.1 m 931 mm 0.5
GFS 148 km/h 1.1 m 645 mm 0.5
ECMWF 151 km/h 0.9 m 635 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 CHAN-HOM (ECHO 07 Oct 2020)Wed, 07 Oct 2020 13:03

  • New Tropical Cyclone CHAN-HOM formed on 4 October over the eastern Philippine Sea, moving north-west towards southern Japan. On 7 October at 0.00 UTC, it was approximately 830 km east-southeast of Okinawa Island, with maximum sustained winds of 111 km/h (tropical storm).
  • CHAN-HOM is forecast to continue north-west, passing close to central and northern Ryukyu Islands on 8-10 October, with maximum sustained winds up to 150 km/h before moving north-northeast near to Kyushu, Shikoku and the eastern coast of Honshu on 10-11 October.
  • For the next 24 hours, heavy rain and strong winds are forecast over most parts of northern Ryukyu Islands, Kyushu, Shikoku, southern and central Honshu.
Japan - Tropical Cyclone CHAN-HOM update (ECHO 08 Oct 2020)Thu, 08 Oct 2020 13:04

  • Tropical Cyclone CHAN-HOM is moving north over the Pacific Ocean, towards the eastern coast of southern Japan. On 8 October at 0.00 UTC, its centre was approximately 300 km east of Amami Islands (Ryukyu Archipelago) and 460 km south-east of Miyazaki City (Kyushu Island), with maximum sustained winds of 130 km/h.
  • CHAN-HOM is forecast to strengthen as it moves along the central-south eastern coast of Japan. CHAN-HOM could reach the Greater Tokyo Area on 10 October, with maximum sustained winds of 110-120 km/h.
  • Warnings for high waves have been issued for Amami Islands and Kyushu Islands on 8 October. Rain is expected over most of southern and central Japan on 8-9 October.
Japan - Tropical Cyclone CHAN-HOM update (ECHO 09 Oct 2020)Fri, 09 Oct 2020 13:07

  • Tropical Cyclone CHAN-HOM is moving north-east over the northern Philippean Sea, approximately 230 km east of Tosashimizu City (Kochi Prefecture, Shikoku), with maximum sustained winds of 139 km/h.
  • CHAN-HOM is forecast to weaken as it passes close to the southern coast of Japan, including Shikoku and Honshu, on 9-10 October with maximum sustained winds of up to 120 km/h. After that, it will dissipate offshore over the North Pacific Ocean.
  • Heavy rain and strong winds are forecast over most of Shikoku, Kyushu and Honshu. Warnings for high waves and storms have been issued for Amami Islands, southern Shikoku, southern Kyushu and south-western Honshu.
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: 14 | About casualties: 0 | Last hour: 0

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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 (38), (2), WMO (1), INFORM (2),