Overall Green Tropical Cyclone for COURTNEY-25 Off-shore from 24 Mar 2025 12:00 UTC to 31 Mar 2025 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 Green Tropical Cyclone for COURTNEY-25

Off-shore

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Meteorological source:

GDACS JTWC
Primary source
WMO-RSMC La Réunion

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone COURTNEY-25 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	WMO/RSMC La Réunion - Meteo France
Exposed countries
Exposed population	No people in Category 1 or higher
Maximum wind speed	232 km/h
Maximum storm surge	0.2 m (25 Mar 14:00 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	106 km/h	n.a.	n.a.	0.5
Overall	232 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 WMO/RSMC La Réunion - Meteo France impact

Joint Pilot Activity: EC-JRC,WMO/RSMC La Réunion-Meteo France

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Wind

106 km/h Current Max.

Up to no 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
1	24 Mar 2025 00:00	63	No people	No people
2	24 Mar 2025 06:00	74	No people	No people
3	24 Mar 2025 12:00	74	No people	No people
4	24 Mar 2025 18:00	84	No people	No people
5	25 Mar 2025 00:00	84	No people	No people
6	25 Mar 2025 06:00	74	No people	No people
7	25 Mar 2025 12:00	74	No people	No people
8	25 Mar 2025 18:00	84	No people	No people
9	26 Mar 2025 00:00	95	No people	No people
10	26 Mar 2025 06:00	106	No people	No people
11	26 Mar 2025 12:00	127	No people	No people
12	26 Mar 2025 18:00	158	No people	No people
13	27 Mar 2025 00:00	148	No people	No people
14	27 Mar 2025 06:00	158	No people	No people
15	27 Mar 2025 12:00	169	No people	No people
16	27 Mar 2025 18:00	179	No people	No people
17	28 Mar 2025 00:00	169	No people	No people
18	28 Mar 2025 06:00	158	No people	No people
19	28 Mar 2025 12:00	201	No people	No people
20	28 Mar 2025 18:00	201	No people	No people
21	29 Mar 2025 00:00	211	No people	No people
22	29 Mar 2025 06:00	211	No people	No people
23	29 Mar 2025 12:00	232	No people	No people
24	29 Mar 2025 18:00	232	No people	No people
25	30 Mar 2025 00:00	211	No people	No people
26	30 Mar 2025 06:00	190	No people	No people
27	30 Mar 2025 12:00	158	No people	No people
28	30 Mar 2025 18:00	137	No people	No people
29	31 Mar 2025 00:00	127	No people	No people
30	31 Mar 2025 06:00	127	No people	No people
31	31 Mar 2025 12:00	116	No people	No people
32	31 Mar 2025 18:00	106	No people	No people

Bulletin Timeline

N°	Date (UTC)	Category (SSHS)	Max winds (km/h)	Population in Cat.1 or higher	Population in Tropical Storm or higher	Category (WMO/RSMC) **	Max winds (km/h) (WMO/RSMC)	Location (lat, lon)
1	24 Mar 2025 00:00	Tropical storm	63	no people	no people	Tropical Depression	56	-15.2, 113.2
2	24 Mar 2025 06:00	Tropical storm	74	no people	no people	Moderate Tropical Storm	65	-16, 112.2
3	24 Mar 2025 12:00	Tropical storm	74	no people	no people	Moderate Tropical Storm	65	-16.3, 111.4
4	24 Mar 2025 18:00	Tropical storm	84	no people	no people	Moderate Tropical Storm	74	-16.5, 110.7
5	25 Mar 2025 00:00	Tropical storm	84	no people	no people	Moderate Tropical Storm	74	-16.7, 110.1
6	25 Mar 2025 06:00	Tropical storm	74	no people	no people	Moderate Tropical Storm	65	-16.8, 109.2
7	25 Mar 2025 12:00	Tropical storm	74	no people	no people	Moderate Tropical Storm	65	-17.1, 108.2
8	25 Mar 2025 18:00	Tropical storm	84	no people	no people	Moderate Tropical Storm	74	-17.2, 107.3
9	26 Mar 2025 00:00	Tropical storm	95	no people	no people	Moderate Tropical Storm	83	-17.4, 106
10	26 Mar 2025 06:00	Tropical storm	106	no people	no people	Severe Tropical Storm	93	-17.7, 104.3
11	26 Mar 2025 12:00	Category 1	127	no people	no people	Severe Tropical Storm	111	-17.5, 103.2
12	26 Mar 2025 18:00	Category 2	158	no people	no people	Tropical Cyclone	139	-17.3, 102.1
13	27 Mar 2025 00:00	Category 1	148	no people	no people	Tropical Cyclone	130	-17.1, 101
14	27 Mar 2025 06:00	Category 2	158	no people	no people	Tropical Cyclone	139	-16.9, 99.9
15	27 Mar 2025 12:00	Category 2	169	no people	no people	Tropical Cyclone	148	-16.7, 99.2
16	27 Mar 2025 18:00	Category 3	179	no people	no people	Tropical Cyclone	157	-16.6, 98
17	28 Mar 2025 00:00	Category 2	169	no people	no people	Tropical Cyclone	148	-16.5, 96.7
18	28 Mar 2025 06:00	Category 2	158	no people	no people	Tropical Cyclone	139	-16.7, 95.7
19	28 Mar 2025 12:00	Category 3	201	no people	no people	Intense Tropical Cyclone	176	-17.3, 94.6
20	28 Mar 2025 18:00	Category 3	201	no people	no people	Intense Tropical Cyclone	176	-17.4, 93.2
21	29 Mar 2025 00:00	Category 4	211	no people	no people	Intense Tropical Cyclone	185	-17.6, 92.2
22	29 Mar 2025 06:00	Category 4	211	no people	no people	Intense Tropical Cyclone	185	-18, 91
23	29 Mar 2025 12:00	Category 4	232	no people	no people	Intense Tropical Cyclone	204	-18.6, 90.1
24	29 Mar 2025 18:00	Category 4	232	no people	no people	Intense Tropical Cyclone	204	-19.3, 89.4
25	30 Mar 2025 00:00	Category 4	211	no people	no people	Intense Tropical Cyclone	185	-20.2, 88.8
26	30 Mar 2025 06:00	Category 3	190	no people	no people	Intense Tropical Cyclone	167	-21.1, 88.3
27	30 Mar 2025 12:00	Category 2	158	no people	no people	Tropical Cyclone	139	-21.9, 88
28	30 Mar 2025 18:00	Category 1	137	no people	no people	Tropical Cyclone	120	-22.5, 87.9
29	31 Mar 2025 00:00	Category 1	137	no people	no people	Tropical Cyclone	120	-23.2, 88.2
30	31 Mar 2025 06:00	Category 1	127	no people	no people	Severe Tropical Storm	111	-23.9, 88.5
31	31 Mar 2025 12:00	Tropical storm	116	no people	no people	Severe Tropical Storm	102	-24.5, 88.7
32	31 Mar 2025 18:00	Tropical storm	106	no people	no people	Severe Tropical Storm	93	-25.1, 88.9
32	01 Apr 2025 06:00	Tropical storm	95	no people	no people	Moderate Tropical Storm	83	-25.8, 88.7
32	01 Apr 2025 18:00	Tropical storm	84	no people	no people	Moderate Tropical Storm	74	-26.1, 88.3
32	02 Apr 2025 06:00	Tropical storm	74	no people	no people	Moderate Tropical Storm	65	-26.2, 87
32	02 Apr 2025 18:00	Tropical storm	63	no people	no people	Tropical Depression	56	-25.8, 85
32	03 Apr 2025 06:00	Tropical storm	63	no people	no people	Tropical Depression	56	-25.2, 81.5
32	03 Apr 2025 18:00	Tropical depression	53	no people	no people	Tropical Disturbance	46	-25.9, 78.6

Tropical disturbance/Weak low pressure area/Remnant low (Vmax < 51 km/h), see WMO

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

0.2 m

The maximum Storm surge height is 0.2m in Wickham, Australia. This height is estimated for 25 Mar 2025 14:00 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 (23 locations). Calculation based on advisory number 32 of 31 Mar 2025 18:00:00 UTC. (Simulation using 0.5 minute resolution)

Level	Date (UTC)	Name	Country	Storm surge height (m)
	25 Mar 2025 14:00	Wickham	Australia	0.2
	25 Mar 2025 14:00	Point Samson	Australia	0.2
	25 Mar 2025 14:00	Cossack	Australia	0.2
	25 Mar 2025 12:00	Semarang	Indonesia	0.2
	25 Mar 2025 12:00	Bugel	Indonesia	0.2
	25 Mar 2025 12:00	Karanggondang	Indonesia	0.2
	25 Mar 2025 15:00	Mardie	Australia	0.2
	25 Mar 2025 12:00	Learmonth	Australia	0.2
	25 Mar 2025 12:00	Karangroto	Indonesia	0.2
	25 Mar 2025 12:00	Kedungmalang	Indonesia	0.2
	25 Mar 2025 14:00	Taju	Indonesia	0.2
	25 Mar 2025 12:00	Sidaju	Indonesia	0.1
	25 Mar 2025 12:00	Aermata	Indonesia	0.1
	25 Mar 2025 12:00	Klampis	Indonesia	0.1
	25 Mar 2025 12:00	Sapulu	Indonesia	0.1
	25 Mar 2025 12:00	Wedung	Indonesia	0.1
	25 Mar 2025 14:00	East Lewis I	Australia	0.1
	25 Mar 2025 12:00	Mangkang-Kulan	Indonesia	0.1
	25 Mar 2025 13:00	Exmouth	Australia	0.1
	25 Mar 2025 01:00	Brondong	Indonesia	0.1
	25 Mar 2025 12:00	Kendal	Indonesia	0.1
	25 Mar 2025 12:00	Jepara	Indonesia	0.1
	25 Mar 2025 15:00	Ah Chong I	Australia	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.