Overall Green Tropical Cyclone for OMAIS-21 in Japan, Marshall Islands from 10 Aug 2021 12:00 UTC to 23 Aug 2021 06:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Green Tropical Cyclone for OMAIS-21

in Japan, Marshall Islands

Event summary

Tropical Cyclone OMAIS-21 can have a low humanitarian impact based on the maximum sustained wind speed, exposed population and vulnerability.

GDACS ID	TC 1000813
Name	OMAIS-21
From - To	10 Aug - 23 Aug
Exposed countries	Japan, Marshall Islands
Exposed population	No people in Category 1 or higher
Maximum wind speed	93 km/h Tropical storm
Maximum storm surge
Vulnerability	High (Marshall Is.)

GDACS Score

For more info on GDACS alert score click here.

	Wind	Storm surge	Rainfall	GDACS score
GDACS JTWC	n.a	0 m	n.a.	0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF	83 km/h	0.2 m	425 mm	0.5
GFS	108 km/h	2.2 m	1228 mm	0.5
ECMWF	101 km/h	2.9 m	211 mm	0.5

Maximum expected impact (wind, storm surge and rainfall) using different data sources.

Virtual OSOCC

Meteo assessment

Satellite products

Analytical products

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)

Latest media headlines

South Korea – Typhoon Omais Dumps 98mm of Rain in 1 Hour 8/25/2021 4:08:00 PM.

More Rain in the Offing as Typhoon Omais Recedes 8/25/2021 5:42:00 AM.

Dozens of Flights, Shipping Routes Canceled due to Typhoon Omais 8/25/2021 12:26:00 AM.

Il tifone Omais si abbatte sulla Corea del Sud: 205mm di pioggia e olt.. 8/24/2021 4:17:00 PM.

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

Analytical products

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (40), INFORM (2), (1),

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