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

28 Aug 2026 18 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 BANG-LANG-26 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	HWRF
Exposed countries
Exposed population	No people in Category 1 or higher
Maximum wind speed	173 km/h
Maximum storm surge	0.5 m (28 Aug 21:00 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
HWRF Current	173 km/h	0.5 m	580 mm	0.5
HWRF Overall	173 km/h	n.a.	580 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 28 Aug 2026 18:00 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	0	-	-	-	-	-	-	-
2	26 Aug 2026 12:00	0	-	-	-	-	-	-	-
3	26 Aug 2026 18:00	0	-	-	-	-	-	-	-
4	27 Aug 2026 00:00	0	-	-	-	-	-	-	-
5	27 Aug 2026 06:00	0	-	-	-	-	-	-	-
6	27 Aug 2026 12:00	0	-	-	-	-	-	-	-
7	27 Aug 2026 18:00	0	-	-	-	-	-	-	-
8	28 Aug 2026 00:00	0	-	-	-	-	-	-	-
9	28 Aug 2026 06:00	0	-	-	-	-	-	-	-
10	28 Aug 2026 12:00	0	-	-	-	-	-	-	-
11	28 Aug 2026 18:00	173	-	-	-	-	-	-	-

Download:

Impact estimation for the next 72h

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Rainfall

580 mm

No people can be affected by rain higher than 100mm (see SSHS)

Rain exposed population - AoIs

No exposed population (greater than 50mm) based on the bulletin of 28 Aug 2026 18:00 UTC (Overall situation)

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
1	26 Aug 2026 06:00	0	-	-	-	-	-	-	-
2	26 Aug 2026 12:00	0	-	-	-	-	-	-	-
3	26 Aug 2026 18:00	0	-	-	-	-	-	-	-
4	27 Aug 2026 00:00	0	-	-	-	-	-	-	-
5	27 Aug 2026 06:00	0	-	-	-	-	-	-	-
6	27 Aug 2026 12:00	0	-	-	-	-	-	-	-
7	27 Aug 2026 18:00	0	-	-	-	-	-	-	-
8	28 Aug 2026 00:00	0	-	-	-	-	-	-	-
9	28 Aug 2026 06:00	0	-	-	-	-	-	-	-
10	28 Aug 2026 12:00	0	-	-	-	-	-	-	-
11	28 Aug 2026 18:00	580	-	-	-	-	-	-	-

Impact estimation for the next 72h

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StormSurge

0.5 m

The maximum Storm surge height is 0.5m in Tayezhnyy, 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

Storm Surge Exposed locations

Calculation based on the bulletin of 28 Aug 2026 18:00 UTC (Overall situation)

Level	Date (UTC)	Name	Country	Storm surge height (m)
	28 Aug 2026 21:00	Tayezhnyy	Russia	0.5
	28 Aug 2026 21:00	Lesozavodskiy	Russia	0.5
	28 Aug 2026 21:00	Dobroye	Russia	0.5
	28 Aug 2026 21:00	Odesskiy	Russia	0.5
	28 Aug 2026 21:00	Mataruzaru	Russia	0.5
	28 Aug 2026 21:00	Selivanovka	Russia	0.5
	28 Aug 2026 21:00	Sanjibotsu	Russia	0.5
	28 Aug 2026 21:30	Rokko	Russia	0.5
	28 Aug 2026 21:30	Mammae	Russia	0.5
	28 Aug 2026 21:30	Okeanskiy	Russia	0.5
	28 Aug 2026 21:00	Reydovo	Russia	0.4
	28 Aug 2026 21:00	Rokubanchi	Russia	0.4
	28 Aug 2026 21:00	Higashirucharu	Russia	0.4
	28 Aug 2026 20:45	Parusnoye	Russia	0.4
	28 Aug 2026 20:45	Sopochnyy	Russia	0.4
	28 Aug 2026 20:45	Sokitani	Russia	0.4
	28 Aug 2026 20:45	Sentyabrskiy	Russia	0.4
	28 Aug 2026 21:00	Osenniy	Russia	0.4
	28 Aug 2026 21:00	Zolotoy	Russia	0.4
	28 Aug 2026 21:00	Kuybyshevo	Russia	0.4
	28 Aug 2026 21:00	Kasatka	Russia	0.4
	29 Aug 2026 12:00	Otlivnyy	Russia	0.4
	29 Aug 2026 12:00	Chikkaporo	Russia	0.4
	28 Aug 2026 21:15	Berezovka	Russia	0.4
	28 Aug 2026 21:15	Riyaushi	Russia	0.4
	28 Aug 2026 21:15	Podgornyy	Russia	0.4
	28 Aug 2026 21:00	Shamambe	Russia	0.4
	28 Aug 2026 22:45	Sernozavodskiy	Russia	0.3
	28 Aug 2026 20:45	Yanketo	Russia	0.3
	28 Aug 2026 20:45	Kitovyy	Russia	0.3
	28 Aug 2026 20:45	Matoiso	Russia	0.3
	28 Aug 2026 20:45	Slavnoye	Russia	0.3
	28 Aug 2026 21:15	Rybaki	Russia	0.3
	28 Aug 2026 21:15	Chippuporo	Russia	0.3
	28 Aug 2026 21:15	Kurilsk	Russia	0.3
	28 Aug 2026 21:00	Mysovaya	Russia	0.3
	28 Aug 2026 20:45	Kompaneysk	Russia	0.3
	28 Aug 2026 20:45	Ryabinovka	Russia	0.3
	28 Aug 2026 20:45	Kastrikum	Russia	0.3
	28 Aug 2026 23:00	Iodnyy	Russia	0.3
	28 Aug 2026 23:00	Nov'	Russia	0.3
	28 Aug 2026 20:15	Astaurova	Russia	0.3
	28 Aug 2026 20:45	Medvezhye	Russia	0.3
	28 Aug 2026 21:00	Kitoboynyy	Russia	0.3
	28 Aug 2026 21:00	Kostochko	Russia	0.3
	28 Aug 2026 22:30	Kambaraiso	Russia	0.3
	28 Aug 2026 21:45	Kraternyy	Russia	0.3
	28 Aug 2026 21:45	Aleutka	Russia	0.2
	30 Aug 2026 18:45	Ronkiti	Micronesia	0.1
	30 Aug 2026 18:45	Palikir	Micronesia	0.1
	30 Aug 2026 18:45	Kolonia	Micronesia	0.1
	30 Aug 2026 18:45	Lot	Micronesia	0.1
	30 Aug 2026 18:45	Metalanim	Micronesia	0.1
	29 Aug 2026 03:15	Wotje	Marshall Islands	0.1
	29 Aug 2026 03:15	Kaven	Marshall Islands	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.