Overall Green alert Tropical Cyclone for DOLPHIN-20
in Japan, Russian Federation,

Event summary

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

GDACS ID TC 1000721
Name DOLPHIN-20
From - To 20 Sep - 24 Sep
Exposed countries Japan, Russian Federation,
Exposed population No people in Category 1 or higher
Maximum wind speed 111 km/h Tropical storm
Maximum storm surge 0.3 m (23 Sep 09:00 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 0.3 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 191 km/h 0.7 m 1334 mm 0.5
GFS 122 km/h 0.7 m 690 mm 0.5
ECMWF 86 km/h 0.5 m 591 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 DOLPHIN (ECHO 22 Sep 2020)Tue, 22 Sep 2020 13:10

  • On 20 September, a new Tropical Cyclone named DOLPHIN formed over the northern Philippine Sea and started moving north toward Honshu Island (Japan). On 22 September, its centre was located offshore approximately 950 km south of Shizuoka City (southern coast of Honshu, around 120 south-west of the Tokyo area), with maximum sustained wind of 95 km/h (tropical storm).
  • DOLPHIN is forecast to continue northward over the sea and it is expected to reach the Shizuoka and the Tokyo area on 24 September as a extra-tropical low, with maximum sustained wind around 90 km/h.
  • Heavy rain, strong wind and storm surge are forecast over central, eastern and northern Honshu on 23-25 September.
Japan - Tropical Storm DOLPHIN update (ECHO 23 Sep 2020)Wed, 23 Sep 2020 12:57

  • Tropical Storm DOLPHIN is moving north-east over Philippine Sea, and on 23 September, its centre was located offshore approximately 260 km south-west of Hachijo Island (Izu archipelago), and 320 km south of Higashimuro City (Wakayama Prefecture, south-eastern coast of Honshu), with maximum sustained wind of 95 km/h.
  • In the afternoon of 23 September, DOLPHIN is forecast to make landfall over Hachijo island with maximum sustained wind up to 95 km/h. Afterwards, DOLPHIN will continue north-east over the North Pacific Ocean, moving along the coast of eastern Honshu island as a Tropical Storm, and passing close to Tokyo Metropolitan Area on 24 September.
  • Heavy rain, strong wind and high waves are forecast over southern Izu islands, and moderate rain is forecast over central-eastern Honshu. Red warnings for heavy rain and high waves have been issued over southern Izu, including Hachijo, and for heavy rain over north-eastern 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: 148 | About casualties: 10 | Last hour: 0

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New tropical depression swirls in the West PacificSun, 27 Sep 2020 06:21:00 +0200.

Tropical activity may have settled down across the Atlantic and East Pacific basins, but the West Pacific continues to churn out new tropical systems. A newly formed depression may track toward southern Japan into next week. As what was onc
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Tokyo and Eastern Japan on Alert over Typhoon DolphinFri, 25 Sep 2020 09:15:00 +0200.

TOKYO – Tokyo prefecture and others in central and eastern Japan were on meteorological alert from Thursday over the advent of Typhoon Dolphin, which will see risks of torrential rainfall, strong waves and gusts of wind. The 12th typhoon of
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NASA nets Dolphin as an extratropical stormThu, 24 Sep 2020 21:46:00 +0200.

NASA's Aqua satellite caught a visible image of Dolphin after it passed east central Japan on Sept. 24, 2020, where it became an extratropical storm in the Northwestern Pacific Ocean.

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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),