Overall Red Tropical Cyclone for SINLAKU-26 in Northern Mariana Islands, Guam from 09 Apr 2026 00:00 UTC to 19 Apr 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 Red Tropical Cyclone for SINLAKU-26

in Northern Mariana Islands, Guam

19 Apr 2026 18 UTC

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Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

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

Meteorological source	GDACS
Glide number:	TC-2026-000050-FSM
Exposed countries	Northern Mariana Islands, Guam
Exposed population	50 thousand in Category 1 or higher
Maximum wind speed	287 km/h
Maximum storm surge	0.9 m (14 Apr 11:00 UTC)
Vulnerability	Medium (Northern Mariana Is.)
Landfall	between 14 Apr 2026 06:00 - 14 Apr 2026 12:00 in Northern Mariana Islands

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	0.9 m	n.a.	0.5
Overall	287 km/h	0.9 m	n.a.	2.5
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 270000 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	09 Apr 2026 00:00	167	270 thousand	170 thousand	Guam
2	09 Apr 2026 06:00	213	270 thousand	40 thousand	Guam
3	09 Apr 2026 12:00	213	270 thousand	180 thousand	Guam
4	09 Apr 2026 18:00	194	270 thousand	180 thousand	Guam
5	10 Apr 2026 00:00	194	270 thousand	180 thousand	Guam
6	10 Apr 2026 06:00	204	270 thousand	180 thousand	Guam
7	10 Apr 2026 12:00	213	270 thousand	180 thousand	Guam
8	10 Apr 2026 18:00	213	270 thousand	180 thousand	Guam
9	11 Apr 2026 00:00	222	270 thousand	180 thousand	Guam
10	11 Apr 2026 06:00	231	270 thousand	180 thousand	Guam
11	11 Apr 2026 12:00	231	270 thousand	180 thousand	Guam
12	11 Apr 2026 18:00	241	270 thousand	120 thousand	Guam, Northern Mariana Islands
13	12 Apr 2026 00:00	241	270 thousand	50 thousand	Northern Mariana Islands
14	12 Apr 2026 06:00	250	270 thousand	50 thousand	Northern Mariana Islands
15	12 Apr 2026 12:00	259	270 thousand	50 thousand	Northern Mariana Islands
16	12 Apr 2026 18:00	259	270 thousand	50 thousand	Northern Mariana Islands
17	13 Apr 2026 00:00	259	270 thousand	50 thousand	Northern Mariana Islands
18	13 Apr 2026 06:00	269	270 thousand	50 thousand	Northern Mariana Islands
19	13 Apr 2026 12:00	269	270 thousand	50 thousand	Northern Mariana Islands
20	13 Apr 2026 18:00	269	270 thousand	50 thousand	Northern Mariana Islands
21	14 Apr 2026 00:00	250	270 thousand	50 thousand	Northern Mariana Islands
22	14 Apr 2026 06:00	241	270 thousand	50 thousand	Northern Mariana Islands
23	14 Apr 2026 12:00	231	270 thousand	50 thousand	Northern Mariana Islands
24	14 Apr 2026 18:00	213	270 thousand	50 thousand	Northern Mariana Islands
25	15 Apr 2026 00:00	204	270 thousand	50 thousand	Northern Mariana Islands
26	15 Apr 2026 06:00	204	270 thousand	50 thousand	Northern Mariana Islands, Guam
27	15 Apr 2026 12:00	204	270 thousand	50 thousand	Northern Mariana Islands, Guam
28	15 Apr 2026 18:00	213	270 thousand	50 thousand	Northern Mariana Islands, Guam
29	16 Apr 2026 00:00	185	270 thousand	50 thousand	Northern Mariana Islands, Guam
30	16 Apr 2026 06:00	185	270 thousand	50 thousand	Northern Mariana Islands, Guam
31	16 Apr 2026 12:00	167	270 thousand	50 thousand	Northern Mariana Islands, Guam
32	16 Apr 2026 18:00	157	270 thousand	50 thousand	Northern Mariana Islands, Guam
33	17 Apr 2026 00:00	148	270 thousand	50 thousand	Northern Mariana Islands, Guam
34	17 Apr 2026 06:00	148	270 thousand	50 thousand	Northern Mariana Islands, Guam
35	17 Apr 2026 12:00	148	270 thousand	50 thousand	Northern Mariana Islands, Guam
36	17 Apr 2026 18:00	130	270 thousand	50 thousand	Northern Mariana Islands, Guam
37	18 Apr 2026 00:00	120	270 thousand	50 thousand	Northern Mariana Islands, Guam
38	18 Apr 2026 06:00	111	270 thousand	50 thousand	Northern Mariana Islands, Guam
39	18 Apr 2026 12:00	111	270 thousand	50 thousand	Northern Mariana Islands, Guam
40	18 Apr 2026 18:00	102	270 thousand	50 thousand	Northern Mariana Islands, Guam
41	19 Apr 2026 00:00	102	270 thousand	50 thousand	Northern Mariana Islands, Guam
42	19 Apr 2026 06:00	93	270 thousand	50 thousand	Northern Mariana Islands, Guam
43	19 Apr 2026 12:00	102	270 thousand	50 thousand	Northern Mariana Islands, Guam
44	19 Apr 2026 18:00	93	270 thousand	50 thousand	Northern Mariana Islands, Guam

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)	Countries
1	09 Apr 2026 00:00	Tropical depression	46	no people	no people	8.7, 152.1
2	09 Apr 2026 06:00	Tropical depression	56	no people	38000 people	8.1, 152.1
3	09 Apr 2026 12:00	Tropical depression	56	no people	42000 people	8.1, 151.8
4	09 Apr 2026 18:00	Tropical storm	65	no people	42000 people	8.4, 151.6
5	10 Apr 2026 00:00	Tropical storm	74	no people	47000 people	8.2, 151.2
6	10 Apr 2026 06:00	Tropical storm	83	no people	47000 people	8.2, 151
7	10 Apr 2026 12:00	Tropical storm	102	no people	44000 people	8.1, 150.9
8	10 Apr 2026 18:00	Tropical storm	111	no people	43000 people	8, 151
9	11 Apr 2026 00:00	Category 1	139	2300 people	43000 people	8.5, 151.5
10	11 Apr 2026 06:00	Category 1	148	2200 people	43000 people	8.8, 151.4
11	11 Apr 2026 12:00	Category 2	157	<1000 people	47000 people	9, 151.1
12	11 Apr 2026 18:00	Category 2	176	no people	47000 people	9.3, 151.5
13	12 Apr 2026 00:00	Category 3	204	no people	43000 people	9.9, 151.2
14	12 Apr 2026 06:00	Category 4	241	no people	42000 people	10.3, 150.6
15	12 Apr 2026 12:00	Category 5	278	no people	23000 people	11.1, 150.2
16	12 Apr 2026 18:00	Category 5	287	no people	230000 people	11.6, 149.5
17	13 Apr 2026 00:00	Category 5	287	no people	230000 people	12.2, 148.9
18	13 Apr 2026 06:00	Category 5	278	no people	230000 people	12.7, 148
19	13 Apr 2026 12:00	Category 5	278	no people	230000 people	13.1, 147.4
20	13 Apr 2026 18:00	Category 5	269	48000 people	230000 people	13.7, 147
21	14 Apr 2026 00:00	Category 4	250	48000 people	230000 people	14.3, 146.5
22	14 Apr 2026 06:00	Category 4	241	50000 people	230000 people	14.6, 146
23	14 Apr 2026 12:00	Category 4	231	50000 people	230000 people	14.9, 145.8	Northern Mariana Islands
24	14 Apr 2026 18:00	Category 4	213	50000 people	230000 people	15.2, 145.4
25	15 Apr 2026 00:00	Category 3	204	48000 people	230000 people	15.6, 145.2
26	15 Apr 2026 06:00	Category 3	204	no people	230000 people	16, 144.9
27	15 Apr 2026 12:00	Category 3	204	25000 people	230000 people	16.2, 144.6
28	15 Apr 2026 18:00	Category 4	213	no people	230000 people	16.7, 144.5
29	16 Apr 2026 00:00	Category 3	185	no people	230000 people	17.1, 144.4
30	16 Apr 2026 06:00	Category 3	185	no people	77000 people	17.7, 144.5
31	16 Apr 2026 12:00	Category 2	167	no people	48000 people	18.4, 144.8
32	16 Apr 2026 18:00	Category 2	157	no people	35000 people	19, 145
33	17 Apr 2026 00:00	Category 1	148	no people	no people	19.5, 145.4
34	17 Apr 2026 06:00	Category 1	148	no people	no people	20, 145.8
35	17 Apr 2026 12:00	Category 1	148	no people	no people	20.8, 146.2
36	17 Apr 2026 18:00	Category 1	130	no people	no people	21.3, 146.5
37	18 Apr 2026 00:00	Category 1	120	no people	no people	22.3, 146.4
38	18 Apr 2026 06:00	Tropical storm	111	no people	no people	23.3, 146.8
39	18 Apr 2026 12:00	Tropical storm	111	no people	no people	24.3, 147.5
40	18 Apr 2026 18:00	Tropical storm	102	no people	no people	25.3, 148.5
41	19 Apr 2026 00:00	Tropical storm	102	no people	<1000 people	26.5, 149.5
42	19 Apr 2026 06:00	Tropical storm	93	no people	<1000 people	27.6, 151.4
43	19 Apr 2026 12:00	Tropical storm	102	no people	<1000 people	28.3, 153.7
44	19 Apr 2026 18:00	Tropical storm	93	no people	no people	28.7, 156.1
44	20 Apr 2026 06:00	Tropical storm	93	no people	no people	29.4, 161.1
44	20 Apr 2026 18:00	Tropical storm	83	no people	no people	29.5, 166.1

Actual track of the current bulletin

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

Download:

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
Guam	170000 people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Northern Mariana Is.	Northern Mariana Islands	42000 people
Guam	Guam	170000 people

Populated places

Name	Region Province	Country	City class	Population
Saipan		Northern Mariana Islands	Capital	62000 people
Hagåtña		Guam	Capital	1000 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)
Minami Torishima		7	Civ.	Paved	No	4500
Pagan Airstrip		10				0
Nikko		18				0
Commonwealth Health Center		5				0
Saipan International	SPN	66	Civ.	Paved	Yes	8700
West Tinian	TIQ	82	Civ.	Paved	Yes	5900
Dynasty		46				0
Rota I International	ROP	185	Civ.	Paved	Yes	6000
Andersen AFB	UAM	191				0
A.B. Won Pat International	GUM	91				0
Truk International	TKK	3	Civ.	Paved	Yes	6000

Ports

Name	LOCODE	Country
Minami Tori		Japan
Farallon de Pajaros		Japan
Pagan Island		Northern Mariana Islands
Guguan Island		Northern Mariana Islands
Farallon de Medinilla		Northern Mariana Islands
Saipan	MPSPN	Northern Mariana Islands
Tinian		Northern Mariana Islands
Rota		Northern Mariana Islands
Apra (Agana)	GUAPR	Guam
Apra Harbor		Guam
Moen		Micronesia

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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

0.9 m

The maximum Storm surge height is 0.9m in Sunharon Roads, Northern Mariana Islands. This height is estimated for 14 Apr 2026 11:00 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 (18 locations). Calculation based on advisory number 44 of 19 Apr 2026 18:00:00 UTC. (Simulation using 6 minute resolution)

Level	Date (UTC)	Name	Country	Storm surge height (m)
	14 Apr 2026 11:00	Sunharon Roads	Northern Mariana Islands	0.9
	14 Apr 2026 17:00	Afetna	Northern Mariana Islands	0.9
	14 Apr 2026 13:00	Susupi	Northern Mariana Islands	0.9
	14 Apr 2026 13:00	Laolao	Northern Mariana Islands	0.9
	14 Apr 2026 15:00	Garapan	Northern Mariana Islands	0.9
	14 Apr 2026 15:00	Mutcho	Northern Mariana Islands	0.9
	14 Apr 2026 13:00	Chalan Kanoa	Northern Mariana Islands	0.9
	14 Apr 2026 13:00	Aslito	Northern Mariana Islands	0.9
	14 Apr 2026 15:00	Tanapag	Northern Mariana Islands	0.9
	14 Apr 2026 13:00	Saipan	Northern Mariana Islands	0.9
	14 Apr 2026 15:00	San Roque	Northern Mariana Islands	0.9
	14 Apr 2026 13:00	Kagman	Northern Mariana Islands	0.9
	16 Apr 2026 09:00	Shomushon	Northern Mariana Islands	0.2
	16 Apr 2026 09:00	Marasu	Northern Mariana Islands	0.2
	14 Apr 2026 18:00	Songsong	Northern Mariana Islands	0.1
	14 Apr 2026 18:00	Teteto	Northern Mariana Islands	0.1
	14 Apr 2026 18:00	Rota	Northern Mariana Islands	0.1
	14 Apr 2026 18:00	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.