Overall Green Tropical Cyclone for ETAU-26 Off-shore from 27 Aug 2026 00:00 UTC to 30 Aug 2026 18:00 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 ETAU-26

Off-shore

30 Aug 2026 12 UTC

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Meteorological source:

GDACS JTWC

Impact Single TC

GFS
HWRF
ECMWF

Impact based on all weather systems in the area

Impact

Tropical Cyclone ETAU-26 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	ECMWF
Exposed countries
Exposed population	No people in Category 1 or higher
Maximum wind speed	94 km/h
Maximum storm surge	0.5 m (28 Aug 21:00 UTC)
Vulnerability	--

GDACS Score

GDACS alert score for Tropical Cyclones is 0.5 (GREEN Alert), 1.5 (ORANGE Alert), 2.5 (RED Alert)
For more info on GDACS alert score click here.

	Wind	Storm surge	Rainfall	GDACS score
ECMWF Current	94 km/h	0.4 m	237 mm	0.5
ECMWF Overall	94 km/h	0.5 m	237 mm	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

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Wind

94 km/h

No people by wind speeds of Tropical Storm strength or above

Wind exposed population - AoIs

No exposed population (in Tropical Storm or higher) based on the bulletin of 30 Aug 2026 12:00 UTC (Overall situation)

See TC classification SSHS

Wind Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

N°	Date (UTC)	Max Winds (km/h)	Pop in Cat. 1 or higher	TS	Cat. 1	Cat. 2	Cat. 3	Cat. 4	Cat. 5
1	26 Aug 2026 12:00	72	-	-	-	-	-	-	-
2	27 Aug 2026 00:00	76	-	-	-	-	-	-	-
3	27 Aug 2026 12:00	83	-	-	-	-	-	-	-
4	28 Aug 2026 00:00	72	-	-	-	-	-	-	-
5	28 Aug 2026 12:00	83	-	-	-	-	-	-	-
6	29 Aug 2026 00:00	86	-	-	-	-	-	-	-
7	29 Aug 2026 12:00	94	-	-	-	-	-	-	-
8	30 Aug 2026 00:00	94	-	-	-	-	-	-	-
9	30 Aug 2026 12:00	94	-	-	-	-	-	-	-

Download:

Impact estimation for the next 72h

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Rainfall

Rain exposed population - AoIs

Estimations based on the bulletin of 30 Aug 2026 12:00 UTC (Overall situation)

Level	Country	Population
50-100 mm	Russia, Marshall Islands, Micronesia	37,377	+
	Russia	59
	Other countries	195
	Marshall Islands	32,925
	Micronesia	4,197

Rain Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

N°	Date (UTC)	Max Rainfall (mm)	Pop >100mm or higher	50-100	100-250	250-500	500-750	750-1000	>1000	Countries
1	26 Aug 2026 12:00	127	-	-	-	-	-	-	-
2	27 Aug 2026 00:00	129	-	-	-	-	-	-	-
3	27 Aug 2026 12:00	442	-	-	-	-	-	-	-
4	28 Aug 2026 00:00	416	-	-	-	-	-	-	-
5	28 Aug 2026 12:00	364	-	-	-	-	-	-	-
6	29 Aug 2026 00:00	194	-	-	-	-	-	-	-
7	29 Aug 2026 12:00	123	-		-	-	-	-	-	Marshall Islands
8	30 Aug 2026 00:00	143	-		-	-	-	-	-	Micronesia, Other countries
9	30 Aug 2026 12:00	237	-		-	-	-	-	-	Marshall Islands, Micronesia, Other countries

Impact estimation for the next 72h

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StormSurge

0.5 m

The maximum Storm surge height is 0.5m in Podgornyy, Russia. This height is estimated for 28 Aug 2026 21:00 UTC .

The JRC has developed an experimental global storm surge model, which is run after each advisory issued by the regional tropical cyclone centres. The calculations are published about 20 minutes after a new advisory is detected by GDACS. The calculations identify the populated places affected by storm surge up to three days in advance, using the forecasted track. When forecasts change, the associated storm surge changes too and alert levels may go up or down. All links, data, statistics and maps refer to the latest available calculation. If the calculation for the last advisory is not completed, the latest available calculation is shown.

Storm Surge Exposed population - AoIs

Estimations based on the bulletin of 30 Aug 2026 12:00 UTC (Overall situation)

Level	Country	Population
0.25 - 0.5 m	Russia	08

Storm Surge Exposed locations

Calculation based on the bulletin of 30 Aug 2026 12:00 UTC (Overall situation)

Level	Date (UTC)	Name	Country	Storm surge height (m)
	28 Aug 2026 21:00	Podgornyy	Russia	0.5
	01 Sep 2026 10:00	Kaven	Marshall Islands	0.3
	29 Aug 2026 17:00	Severgino	Russia	0.3
	30 Aug 2026 01:45	Onekotan	Russia	0.3
	28 Aug 2026 14:30	Aleutka	Russia	0.3
	28 Aug 2026 13:45	Kompaneysk	Russia	0.3
	28 Aug 2026 13:45	Ryabinovka	Russia	0.3
	28 Aug 2026 13:45	Kastrikum	Russia	0.3
	30 Aug 2026 00:15	Kraternyy	Russia	0.3
	28 Aug 2026 00:45	Medvezhye	Russia	0.3
	29 Aug 2026 16:45	Makarovka	Russia	0.3
	31 Aug 2026 02:30	Kostochko	Russia	0.3
	02 Sep 2026 08:00	Palikir	Micronesia	0.3
	02 Sep 2026 08:00	Kolonia	Micronesia	0.3
	02 Sep 2026 08:00	Metalanim	Micronesia	0.3
	31 Aug 2026 02:30	Sarychevo	Russia	0.3
	29 Aug 2026 06:30	Lot	Micronesia	0.2
	28 Aug 2026 14:45	Kitoboynyy	Russia	0.2
	30 Aug 2026 21:30	Wotje	Marshall Islands	0.2
	02 Sep 2026 08:00	Ronkiti	Micronesia	0.2

Disclaimer - Copyright
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.