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

29 Aug 2026 06 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	GFS
Exposed countries
Exposed population	No people in Category 1 or higher
Maximum wind speed	148 km/h
Maximum storm surge	0.3 m (29 Aug 09:00 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
GFS Current	148 km/h	0.3 m	146 mm	0.5
GFS Overall	148 km/h	0.5 m	465 mm	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

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Wind

Wind exposed population - AoIs

No exposed population (in Tropical Storm or higher) based on the bulletin of 29 Aug 2026 06:00 UTC

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	27 Aug 2026 00:00	101	-	-	-	-	-	-	-
2	27 Aug 2026 06:00	97	-	-	-	-	-	-	-
3	27 Aug 2026 12:00	97	-	-	-	-	-	-	-
4	27 Aug 2026 18:00	119	-	-	-	-	-	-	-
5	28 Aug 2026 00:00	101	-	-	-	-	-	-	-
6	28 Aug 2026 06:00	119	-	-	-	-	-	-	-
7	28 Aug 2026 12:00	144	-	-	-	-	-	-	-
8	28 Aug 2026 18:00	122	-	-	-	-	-	-	-
9	29 Aug 2026 00:00	122	-	-	-	-	-	-	-
10	29 Aug 2026 06:00	151	-	-	-	-	-	-	-

Download:

Impact estimation for the next 72h

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Rainfall

465 mm

Up to 50 thousand can be affected by rain higher than 100mm (see SSHS)

Rain exposed population - AoIs

Estimations based on the bulletin of 29 Aug 2026 06:00 UTC

Level	Country	Population
250-500 mm	Micronesia	543	+
	Micronesia	536
	Other countries	07
100-250 mm	Micronesia	45,155	+
	Micronesia	45,072
	Other countries	83
50-100 mm	Marshall Islands, Micronesia	2,298	+
	Marshall Islands	617
	Micronesia	1,516
	Other countries	164

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	27 Aug 2026 00:00	133	-	-	-	-	-	-	-
2	27 Aug 2026 06:00	147	-	-	-	-	-	-	-
3	27 Aug 2026 12:00	203	-	-	-	-	-	-	-
4	27 Aug 2026 18:00	201	-	-	-	-	-	-	-
5	28 Aug 2026 00:00	140	-	-	-	-	-	-	-
6	28 Aug 2026 06:00	166	-	-	-	-	-	-	-
7	28 Aug 2026 12:00	113	-	-	-	-	-	-	-
8	28 Aug 2026 18:00	148	-	-	-	-	-	-	-
9	29 Aug 2026 00:00	96	-	-	-	-	-	-	-
10	29 Aug 2026 06:00	366	50 thousand				-	-	-	Marshall Islands, Micronesia, Other countries

Impact estimation for the next 72h

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StormSurge

0.3 m

The maximum Storm surge height is 0.3m in Podgornyy, Russia. This height is estimated for 29 Aug 2026 09:00 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

Storm Surge Exposed locations

Calculation based on the bulletin of 29 Aug 2026 06:00 UTC

Level	Date (UTC)	Name	Country	Storm surge height (m)
	29 Aug 2026 09:00	Podgornyy	Russia	0.3
	29 Aug 2026 12:00	Kraternyy	Russia	0.3
	29 Aug 2026 09:00	Kastrikum	Russia	0.2
	29 Aug 2026 07:30	Kaven	Marshall Islands	0.2
	29 Aug 2026 06:00	Severgino	Russia	0.2
	29 Aug 2026 07:15	Wotje	Marshall Islands	0.2
	29 Aug 2026 12:00	Makarovka	Russia	0.2
	29 Aug 2026 06:00	Onekotan	Russia	0.2
	29 Aug 2026 09:00	Ryabinovka	Russia	0.1
	29 Aug 2026 07:30	Kolonia	Micronesia	0.1
	29 Aug 2026 07:30	Lot	Micronesia	0.1
	29 Aug 2026 07:30	Metalanim	Micronesia	0.1
	29 Aug 2026 06:45	Palikir	Micronesia	0.1
	29 Aug 2026 06:45	Ronkiti	Micronesia	0.1
	29 Aug 2026 12:00	Medvezhye	Russia	0.1
	29 Aug 2026 09:00	Aleutka	Russia	0.1
	29 Aug 2026 11:45	Kompaneysk	Russia	0.1
	29 Aug 2026 12:00	Kitoboynyy	Russia	0.1
	29 Aug 2026 12:00	Kostochko	Russia	0.1
	29 Aug 2026 11:15	Sarychevo	Russia	0.1

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.