Overall Green Tropical Cyclone for BANG-LANG-26 in United States Minor Outlying Islands from 26 Aug 2026 06:00 UTC to 30 Aug 2026 12:00 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 BANG-LANG-26

in United States Minor Outlying Islands

30 Aug 2026 12 UTC

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to select bulletin time

Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone BANG-LANG-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	0.4 m (26 Aug 09:30 UTC)
Vulnerability	Low ()

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	104 km/h	0.4 m	516 mm	0.5
GFS Overall	148 km/h	0.4 m	537 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 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 06:00	61	-	-	-	-	-	-	-
2	26 Aug 2026 12:00	61	-	-	-	-	-	-	-
3	26 Aug 2026 18:00	72	-	-	-	-	-	-	-
4	27 Aug 2026 00:00	101	-	-	-	-	-	-	-
5	27 Aug 2026 06:00	97	-	-	-	-	-	-	-
6	27 Aug 2026 12:00	97	-	-	-	-	-	-	-
7	27 Aug 2026 18:00	119	-	-	-	-	-	-	-
8	28 Aug 2026 00:00	101	-	-	-	-	-	-	-
9	28 Aug 2026 06:00	119	-	-	-	-	-	-	-
10	28 Aug 2026 12:00	144	-	-	-	-	-	-	-
11	28 Aug 2026 18:00	122	-	-	-	-	-	-	-
12	29 Aug 2026 00:00	122	-	-	-	-	-	-	-
13	29 Aug 2026 06:00	148	-	-	-	-	-	-	-
14	29 Aug 2026 12:00	137	-	-	-	-	-	-	-
15	29 Aug 2026 18:00	140	-	-	-	-	-	-	-
16	30 Aug 2026 00:00	133	-	-	-	-	-	-	-
17	30 Aug 2026 06:00	119	-	-	-	-	-	-	-
18	30 Aug 2026 12:00	104	-	-	-	-	-	-	-

Download:

Impact estimation for the next 72h

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Rainfall

537 mm

Up to 10 thousand can be affected by rain higher than 100mm (see SSHS)

Rain exposed population - AoIs

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

Level	Country	Population
100-250 mm	Marshall Islands, Micronesia	10,704	+
	Marshall Islands	489
	Micronesia	9,961
	Other countries	253
50-100 mm	Russia, Marshall Islands, Micronesia	126,675	+
	Russia	5,783
	Marshall Islands	33,456
	Micronesia	87,306
	Other countries	128

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 06:00	28	-	-	-	-	-	-	-
2	26 Aug 2026 12:00	95	-	-	-	-	-	-	-
3	26 Aug 2026 18:00	199	-	-	-	-	-	-	-
4	27 Aug 2026 00:00	133	-	-	-	-	-	-	-
5	27 Aug 2026 06:00	147	-	-	-	-	-	-	-
6	27 Aug 2026 12:00	203	-	-	-	-	-	-	-
7	27 Aug 2026 18:00	201	-	-	-	-	-	-	-
8	28 Aug 2026 00:00	140	-		-	-	-	-	-	Russia
9	28 Aug 2026 06:00	166	-	-	-	-	-	-	-
10	28 Aug 2026 12:00	113	-	-	-	-	-	-	-
11	28 Aug 2026 18:00	148	-	-	-	-	-	-	-
12	29 Aug 2026 00:00	96	-	-	-	-	-	-	-
13	29 Aug 2026 06:00	146	-	-	-	-	-	-	-
14	29 Aug 2026 12:00	121	-	-	-	-	-	-	-
15	29 Aug 2026 18:00	57	-	-	-	-	-	-	-
16	30 Aug 2026 00:00	79	-	-	-	-	-	-	-
17	30 Aug 2026 06:00	111	-		-	-	-	-	-	Other countries, Micronesia
18	30 Aug 2026 12:00	516	-		-	-	-	-	-	Marshall Islands, Micronesia, Other countries

Impact estimation for the next 72h

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StormSurge

0.4 m

The maximum Storm surge height is 0.4m in Rokko, Russia. This height is estimated for 26 Aug 2026 09:30 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	2,314

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)
	26 Aug 2026 09:30	Rokko	Russia	0.4
	26 Aug 2026 09:30	Mammae	Russia	0.4
	26 Aug 2026 09:30	Tayezhnyy	Russia	0.4
	26 Aug 2026 09:30	Lesozavodskiy	Russia	0.4
	26 Aug 2026 09:30	Dobroye	Russia	0.4
	26 Aug 2026 09:30	Okeanskiy	Russia	0.4
	26 Aug 2026 09:30	Odesskiy	Russia	0.4
	28 Aug 2026 10:00	Reydovo	Russia	0.4
	28 Aug 2026 10:00	Rokubanchi	Russia	0.4
	28 Aug 2026 10:00	Higashirucharu	Russia	0.4
	26 Aug 2026 09:15	Mataruzaru	Russia	0.4
	26 Aug 2026 09:15	Selivanovka	Russia	0.4
	26 Aug 2026 09:15	Sanjibotsu	Russia	0.4
	28 Aug 2026 16:45	Shamambe	Russia	0.4
	01 Sep 2026 17:30	Osenniy	Russia	0.4
	01 Sep 2026 17:30	Otlivnyy	Russia	0.4
	01 Sep 2026 17:30	Zolotoy	Russia	0.4
	01 Sep 2026 17:30	Chikkaporo	Russia	0.4
	01 Sep 2026 17:30	Kuybyshevo	Russia	0.4
	01 Sep 2026 17:30	Kasatka	Russia	0.4
	28 Aug 2026 09:00	Berezovka	Russia	0.3
	28 Aug 2026 09:00	Riyaushi	Russia	0.3
	27 Aug 2026 20:00	Parusnoye	Russia	0.3
	27 Aug 2026 20:00	Sopochnyy	Russia	0.3
	27 Aug 2026 20:00	Sentyabrskiy	Russia	0.3
	28 Aug 2026 09:00	Iodnyy	Russia	0.3
	28 Aug 2026 09:00	Nov'	Russia	0.3
	28 Aug 2026 09:00	Mysovaya	Russia	0.3
	28 Aug 2026 16:30	Rybaki	Russia	0.3
	28 Aug 2026 16:30	Chippuporo	Russia	0.3
	28 Aug 2026 16:30	Kurilsk	Russia	0.3
	28 Aug 2026 16:30	Yanketo	Russia	0.3
	28 Aug 2026 16:30	Kitovyy	Russia	0.3
	28 Aug 2026 16:30	Matoiso	Russia	0.3
	28 Aug 2026 17:15	Podgornyy	Russia	0.3
	28 Aug 2026 02:15	Sokitani	Russia	0.3
	28 Aug 2026 09:45	Slavnoye	Russia	0.3
	28 Aug 2026 02:15	Kambaraiso	Russia	0.3
	27 Aug 2026 20:00	Sernozavodskiy	Russia	0.3
	27 Aug 2026 20:00	Astaurova	Russia	0.3
	28 Aug 2026 17:00	Kompaneysk	Russia	0.3
	28 Aug 2026 17:00	Ryabinovka	Russia	0.3
	28 Aug 2026 15:45	Aleutka	Russia	0.2
	28 Aug 2026 17:00	Kitoboynyy	Russia	0.2
	28 Aug 2026 17:00	Kostochko	Russia	0.2
	28 Aug 2026 17:15	Kastrikum	Russia	0.2
	28 Aug 2026 17:00	Medvezhye	Russia	0.2
	28 Aug 2026 17:00	Kraternyy	Russia	0.2
	30 Aug 2026 21:45	Kaven	Marshall Islands	0.2
	01 Sep 2026 09:45	Kuma	Kiribati	0.1
	01 Sep 2026 01:15	Wotje	Marshall Islands	0.1
	30 Aug 2026 07:45	Ronkiti	Micronesia	0.1
	30 Aug 2026 07:45	Palikir	Micronesia	0.1
	30 Aug 2026 07:45	Kolonia	Micronesia	0.1
	01 Sep 2026 21:45	Lot	Micronesia	0.1
	01 Sep 2026 21:45	Metalanim	Micronesia	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.