Overall Green Tropical Cyclone for HIGOS-26 in Japan, Northern Mariana Islands, Guam from 22 Jun 2026 12:00 UTC to 23 Jun 2026 00:00 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 HIGOS-26

in Japan, Northern Mariana Islands, Guam

23 Jun 2026 00 UTC

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Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

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

Meteorological source	GDACS
Exposed countries	Japan, Northern Mariana Islands, Guam
Exposed population	No people in Category 1 or higher
Maximum wind speed	102 km/h
Maximum storm surge	0.2 m (23 Jun 01:00 UTC)
Vulnerability	Medium (Guam)

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	93 km/h	0.2 m	n.a.	0.5
Overall	102 km/h	0.2 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

93 km/h Current Max.

Up to 50000 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	22 Jun 2026 12:00	74	10 thousand	No people
2	22 Jun 2026 18:00	83	No people	No people
3	23 Jun 2026 00:00	93	50 thousand	No people	Northern Mariana Islands

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	22 Jun 2026 12:00	Tropical depression	46	no people	no people	14.2, 147.8
2	22 Jun 2026 18:00	Tropical depression	56	no people	no people	14.5, 146.5
3	23 Jun 2026 00:00	Tropical storm	65	no people	50000 people	14.7, 145.6
3	23 Jun 2026 12:00	Tropical storm	74	no people	no people	15.2, 143.8
3	24 Jun 2026 00:00	Tropical storm	74	no people	no people	16.2, 141.8
3	24 Jun 2026 12:00	Tropical storm	83	no people	no people	17.6, 139.6
3	25 Jun 2026 00:00	Tropical storm	93	no people	no people	19.4, 137.4
3	25 Jun 2026 12:00	Tropical storm	93	no people	no people	22.1, 135.9
3	26 Jun 2026 00:00	Tropical storm	93	no people	no people	25.8, 135.9
3	27 Jun 2026 00:00	Tropical storm	83	no people	no people	34.4, 144.5
3	28 Jun 2026 00:00	Tropical storm	65	no people	no people	41.5, 158.6

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

Countries

Country	Population in Tropical Storm or higher strength
Northern Mariana Is.	42000 people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Northern Mariana Is.	Northern Mariana Islands	42000 people

Populated places

Name	Region Province	Country	City class	Population
Saipan		Northern Mariana Islands	Capital	62000 people

Critical infrastructure

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

Airports

Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)
Dynasty		46				0
West Tinian	TIQ	82	Civ.	Paved	Yes	5900
Saipan International	SPN	66	Civ.	Paved	Yes	8700
Commonwealth Health Center		5				0
Nikko		18				0
Rota I International	ROP	185	Civ.	Paved	Yes	6000

Ports

Name	LOCODE	Country
Tinian		Northern Mariana Islands
Saipan	MPSPN	Northern Mariana Islands
Rota		Northern Mariana Islands
Tori Island		Japan

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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

0.2 m

The maximum Storm surge height is 0.2m in Sunharon Roads, Northern Mariana Islands. This height is estimated for 23 Jun 2026 01:00 UTC .

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.

Locations affected by Storm surge (16 locations). Calculation based on advisory number 3 of 23 Jun 2026 00:00:00 UTC. (Simulation using 0.5 minute resolution)

Level	Date (UTC)	Name	Country	Storm surge height (m)
	23 Jun 2026 01:00	Sunharon Roads	Northern Mariana Islands	0.2
	23 Jun 2026 02:00	Afetna	Northern Mariana Islands	0.1
	23 Jun 2026 01:00	Susupi	Northern Mariana Islands	0.1
	23 Jun 2026 01:00	Laolao	Northern Mariana Islands	0.1
	23 Jun 2026 01:00	Chalan Kanoa	Northern Mariana Islands	0.1
	23 Jun 2026 01:00	Aslito	Northern Mariana Islands	0.1
	23 Jun 2026 01:00	Saipan	Northern Mariana Islands	0.1
	23 Jun 2026 01:00	Kagman	Northern Mariana Islands	0.1
	23 Jun 2026 02:00	Garapan	Northern Mariana Islands	0.1
	23 Jun 2026 02:00	Mutcho	Northern Mariana Islands	0.1
	23 Jun 2026 02:00	Tanapag	Northern Mariana Islands	0.1
	23 Jun 2026 02:00	San Roque	Northern Mariana Islands	0.1
	23 Jun 2026 03:00	Songsong	Northern Mariana Islands	0.1
	23 Jun 2026 03:00	Teteto	Northern Mariana Islands	0.1
	23 Jun 2026 03:00	Rota	Northern Mariana Islands	0.1
	23 Jun 2026 03:00	Sinapalo	Northern Mariana 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.