Overall Green Tropical Cyclone for SURIGAE-26 in Japan from 23 Sep 2026 06:00 UTC to 30 Sep 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 SURIGAE-26

in Japan

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

Meteorological source	GDACS
Exposed countries	Japan
Exposed population	No people in Category 1 or higher
Maximum wind speed	241 km/h
Maximum storm surge	0.1 m (27 Sep 07:00 UTC)
Vulnerability	--

GDACS Score

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

	Wind	Storm surge	Rainfall	GDACS score
Current	56 km/h	0.1 m	n.a.	0.5
Overall	241 km/h	0.1 m	n.a.	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track) based on GDACS impact

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Wind

56 km/h Current Max.

Up to 1.4 million people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

N°	Date (UTC)	Max Winds (km/h)	Population in Tropical Storm or higher	Population in Cat 1. or higher	Countries
1	23 Sep 2026 06:00	194	Few people	No people
2	23 Sep 2026 12:00	204	No people	No people
3	23 Sep 2026 18:00	194	Few people	No people	Japan
4	24 Sep 2026 00:00	176	1.6 million	1.3 million	Japan
5	24 Sep 2026 06:00	185	1.5 million	1.3 million	Japan
6	24 Sep 2026 12:00	185	3 thousand	Few people
7	24 Sep 2026 18:00	176	2 thousand	No people
8	25 Sep 2026 00:00	167	2 thousand	No people
9	25 Sep 2026 06:00	157	7 thousand	No people	Japan
10	25 Sep 2026 12:00	157	1.3 million	10 thousand	Japan
11	25 Sep 2026 18:00	157	1.3 million	Few people	Japan
12	26 Sep 2026 00:00	157	1.4 million	No people	Japan
13	26 Sep 2026 06:00	176	1.4 million	No people	Japan
14	26 Sep 2026 12:00	176	530 thousand	No people	Japan
15	26 Sep 2026 18:00	176	1.2 million	Few people	Japan
16	27 Sep 2026 00:00	185	1.4 million	Few people	Japan
17	27 Sep 2026 06:00	194	1.4 million	No people	Japan
18	27 Sep 2026 12:00	231	1.4 million	No people	Japan
19	27 Sep 2026 18:00	241	1.4 million	No people	Japan
20	28 Sep 2026 00:00	222	1.4 million	No people	Japan
21	28 Sep 2026 06:00	185	1.4 million	No people	Japan
22	28 Sep 2026 12:00	167	1.4 million	No people	Japan
23	28 Sep 2026 18:00	130	1.4 million	No people	Japan
24	29 Sep 2026 00:00	102	1.4 million	No people	Japan
25	29 Sep 2026 06:00	93	1.4 million	No people	Japan
26	29 Sep 2026 12:00	83	1.4 million	No people	Japan
27	29 Sep 2026 18:00	74	1.4 million	No people	Japan
28	30 Sep 2026 00:00	74	1.4 million	No people	Japan
29	30 Sep 2026 06:00	74	1.4 million	No people	Japan
30	30 Sep 2026 12:00	56	1.4 million	No people	Japan

Bulletin Timeline

N°	Date (UTC)	Category (SSHS)	Max winds (km/h)	Population in Cat.1 or higher	Population in Tropical Storm or higher	Location (lat, lon)
1	23 Sep 2026 06:00	Tropical depression	46	no people	no people	16, 138.4
2	23 Sep 2026 12:00	Tropical depression	56	no people	no people	16.5, 137.6
3	23 Sep 2026 18:00	Tropical storm	65	no people	no people	17.2, 136.2
4	24 Sep 2026 00:00	Tropical storm	65	no people	no people	18.2, 134.3
5	24 Sep 2026 06:00	Tropical storm	83	no people	no people	18.9, 133.1
6	24 Sep 2026 12:00	Tropical storm	74	no people	no people	18.6, 132.5
7	24 Sep 2026 18:00	Tropical storm	65	no people	no people	19.3, 131.7
8	25 Sep 2026 00:00	Tropical storm	74	no people	no people	19.9, 130.7
9	25 Sep 2026 06:00	Tropical storm	83	no people	no people	20.7, 129.3
10	25 Sep 2026 12:00	Tropical storm	93	no people	no people	21.4, 128.2
11	25 Sep 2026 18:00	Tropical storm	102	no people	no people	21.9, 127.8
12	26 Sep 2026 00:00	Tropical storm	111	no people	no people	22.4, 127
13	26 Sep 2026 06:00	Category 1	130	no people	no people	22.9, 126.8
14	26 Sep 2026 12:00	Category 1	130	no people	no people	23.3, 126.9
15	26 Sep 2026 18:00	Category 1	139	no people	40000 people	24, 127.2
16	27 Sep 2026 00:00	Category 2	167	no people	1.3 million people	24.6, 127.6
17	27 Sep 2026 06:00	Category 3	194	no people	1.4 million people	25.4, 128.3
18	27 Sep 2026 12:00	Category 4	231	no people	1.4 million people	25.9, 129.1
19	27 Sep 2026 18:00	Category 4	241	no people	2300 people	26.3, 130
20	28 Sep 2026 00:00	Category 4	222	no people	2300 people	26.6, 130.9
21	28 Sep 2026 06:00	Category 3	185	no people	no people	27.5, 131.6
22	28 Sep 2026 12:00	Category 2	167	no people	no people	27.5, 132.8
23	28 Sep 2026 18:00	Category 1	130	no people	no people	28.1, 133.2
24	29 Sep 2026 00:00	Tropical storm	102	no people	no people	28.6, 133.9
25	29 Sep 2026 06:00	Tropical storm	93	no people	no people	29, 135
26	29 Sep 2026 12:00	Tropical storm	83	no people	no people	29.2, 136.3
27	29 Sep 2026 18:00	Tropical storm	74	no people	no people	29.6, 136.7
28	30 Sep 2026 00:00	Tropical storm	65	no people	<1000 people	30.2, 137.3
29	30 Sep 2026 06:00	Tropical storm	65	no people	13000 people	31.2, 138.3
30	30 Sep 2026 12:00	Tropical depression	56	no people	no people	31.8, 138.8
30	01 Oct 2026 00:00	Tropical depression	56	no people	no people	33.7, 141.1
30	01 Oct 2026 12:00	Tropical depression	56	no people	no people	36.5, 145.2

Actual track of the current bulletin

The alert for forecast greater than 3 days is limited to Orange level.

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Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

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Rainfall

Rainfall accumulation of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.

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StormSurge

The JRC has developed an experimental global storm surge model. 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.

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.