Overall Green Tropical Cyclone alert for OLGA-24 in Australia from 05 Apr 2024 18:00 UTC to 10 Apr 2024 18:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Green alert Tropical Cyclone for OLGA-24

in Australia

Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone OLGA-24 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	GDACS
Exposed countries	Australia
Exposed population	No people in Category 1 or higher
Maximum wind speed	222 km/h
Maximum storm surge	0.7 m (09 Apr 22:00 UTC)
Vulnerability	Low (Australia)
Landfall	between 10 Apr 2024 18:00 - 11 Apr 2024 06:00 in Australia

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
Current	56 km/h	0.3 m	n.a.	0.5
Overall	222 km/h	0.7 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 28000 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	05 Apr 2024 18:00	120	No people	No people
2	06 Apr 2024 00:00	120	No people	No people
3	06 Apr 2024 06:00	148	No people	No people
4	06 Apr 2024 12:00	148	No people	No people
5	06 Apr 2024 18:00	148	No people	No people
6	07 Apr 2024 00:00	148	No people	No people
7	07 Apr 2024 06:00	185	No people	No people
8	07 Apr 2024 12:00	222	No people	No people
9	07 Apr 2024 18:00	213	No people	No people
10	08 Apr 2024 00:00	194	No people	No people
11	08 Apr 2024 06:00	139	No people	No people
12	08 Apr 2024 12:00	111	No people	No people
13	08 Apr 2024 18:00	83	No people	No people
14	09 Apr 2024 00:00	93	1 thousand	No people	Australia
15	09 Apr 2024 06:00	83	3 thousand	No people	Australia
16	09 Apr 2024 12:00	83	5 thousand	No people	Australia
17	09 Apr 2024 18:00	74	30 thousand	No people	Australia
18	10 Apr 2024 00:00	65	30 thousand	No people	Australia
19	10 Apr 2024 06:00	65	30 thousand	No people	Australia
20	10 Apr 2024 12:00	65	30 thousand	No people	Australia
21	10 Apr 2024 18:00	56	30 thousand	No people	Australia

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	05 Apr 2024 18:00	Tropical storm	65	no people	no people	-13.3, 120.2
2	06 Apr 2024 00:00	Tropical storm	74	no people	no people	-12.8, 120.1
3	06 Apr 2024 06:00	Tropical storm	93	no people	no people	-13.1, 120.2
4	06 Apr 2024 12:00	Tropical storm	102	no people	no people	-13.6, 120.2
5	06 Apr 2024 18:00	Category 1	120	no people	no people	-14.3, 119.7
6	07 Apr 2024 00:00	Category 1	139	no people	no people	-14.5, 119.3
7	07 Apr 2024 06:00	Category 3	185	no people	no people	-14.8, 119.2
8	07 Apr 2024 12:00	Category 4	222	no people	no people	-15.4, 119.2
9	07 Apr 2024 18:00	Category 4	213	no people	no people	-15.9, 118.9
10	08 Apr 2024 00:00	Category 3	194	no people	no people	-16.6, 118.5
11	08 Apr 2024 06:00	Category 1	139	no people	no people	-16.5, 118.6
12	08 Apr 2024 12:00	Tropical storm	111	no people	no people	-16.7, 118.6
13	08 Apr 2024 18:00	Tropical storm	83	no people	no people	-16.9, 118.1
14	09 Apr 2024 00:00	Tropical storm	93	no people	no people	-17.2, 117.5
15	09 Apr 2024 06:00	Tropical storm	83	no people	no people	-17.6, 116.6
16	09 Apr 2024 12:00	Tropical storm	83	no people	1500 people	-18.1, 116.4
17	09 Apr 2024 18:00	Tropical storm	74	no people	29000 people	-18.6, 116.1
18	10 Apr 2024 00:00	Tropical storm	65	no people	1100 people	-18.9, 116.1
19	10 Apr 2024 06:00	Tropical storm	65	no people	17000 people	-19.5, 115.6
20	10 Apr 2024 12:00	Tropical storm	65	no people	5300 people	-20.4, 115.2
21	10 Apr 2024 18:00	Tropical depression	56	no people	no people	-21.2, 114.6
21	11 Apr 2024 06:00	Tropical depression	56	no people	no people	-22.4, 113.6	Australia
21	11 Apr 2024 18:00	Tropical depression	46	no people	no people	-22.9, 112.9

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
Australia	26000 people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Western Australia	Australia	26000 people

Populated places

Name	Region Province	Country	City class	Population
Exmouth	Western Australia	Australia	City	-
Dampier	Western Australia	Australia	City	-
Karratha	Western Australia	Australia	City	11000 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)
Onslow	ONS	7	Civ.	Unpaved	Yes	4400
Barrow Island	BWB	8	Civ.	Paved	Yes	6200
Karratha	KTA	9	Civ.	Paved	Yes	6000

Ports

Name	LOCODE	Country
Griffin Venture	AUGRV	Coral Sea Islands
Saladin Marine Terminal	AUSMT	Coral Sea Islands
Airlie Island Terminal		Coral Sea Islands
Onslow		Coral Sea Islands
Port Exmouth		Coral Sea Islands
Barrow Island	AUBWB	Coral Sea Islands
Varanus Island	AUVAR	Coral Sea Islands
Cape Preston	AUCPN	Coral Sea Islands
Wandoo Marine Terminal		Coral Sea Islands
Dampier	AUDAM	Coral Sea Islands
Withnell Bay		Coral Sea Islands
Cossack Pioneer	AUCOP	Coral Sea Islands

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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

0.7 m

The maximum Storm surge height is 0.7m in Wickham, Australia. This height is estimated for 09 Apr 2024 22:00 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 (92 locations). Calculation based on advisory number 5 of 06 Apr 2024 18:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	09 Apr 2024 22:00	Wickham	Australia	0.7
	09 Apr 2024 22:00	Point Samson	Australia	0.7
	09 Apr 2024 22:00	Cossack	Australia	0.7
	05 Apr 2024 22:00	Sabui	Indonesia	0.6
	10 Apr 2024 07:00	Mardie	Australia	0.6
	06 Apr 2024 00:00	Pagatan	Indonesia	0.5
	10 Apr 2024 00:00	East Lewis I	Australia	0.5
	10 Apr 2024 00:00	Ah Chong I	Australia	0.5
	09 Apr 2024 20:00	Condon	Australia	0.5
	06 Apr 2024 00:00	Pagetan	Indonesia	0.4
	06 Apr 2024 00:00	Kualalupak	Indonesia	0.4
	06 Apr 2024 00:00	Aluhaluh	Indonesia	0.4
	06 Apr 2024 00:00	Tambakkarangan	Indonesia	0.4
	06 Apr 2024 00:00	Tabanio	Indonesia	0.4
	06 Apr 2024 00:00	Bawahalajung	Indonesia	0.4
	05 Apr 2024 22:00	Sungaitapah	Indonesia	0.4
	05 Apr 2024 22:00	Koealasapo	Indonesia	0.4
	06 Apr 2024 00:00	Setiroek	Indonesia	0.4
	05 Apr 2024 22:00	Pagarantimun	Indonesia	0.4
	06 Apr 2024 00:00	Mutua	Indonesia	0.4
	06 Apr 2024 00:00	Tandjoengselaka	Indonesia	0.4
	05 Apr 2024 22:00	Loentji	Indonesia	0.4
	10 Apr 2024 13:00	Learmonth	Australia	0.4
	06 Apr 2024 05:00	Nightcliff	Australia	0.4
	06 Apr 2024 05:00	Larrakeyah	Australia	0.4
	06 Apr 2024 05:00	Fannie Bay	Australia	0.4
	06 Apr 2024 05:00	Parap	Australia	0.4
	06 Apr 2024 05:00	Darwin	Australia	0.4
	06 Apr 2024 05:00	Ludmilla	Australia	0.4
	06 Apr 2024 05:00	Bagot	Australia	0.4
	05 Apr 2024 23:00	Bapuju	Indonesia	0.4
	05 Apr 2024 23:00	Bahaur	Indonesia	0.4
	06 Apr 2024 00:00	Batakam	Indonesia	0.4
	06 Apr 2024 00:00	Pulaukutjing	Indonesia	0.3
	06 Apr 2024 00:00	Kandangan	Indonesia	0.3
	06 Apr 2024 04:00	Leanyer	Australia	0.3
	10 Apr 2024 12:00	Exmouth	Australia	0.3
	06 Apr 2024 00:00	Semisir	Indonesia	0.3
	10 Apr 2024 18:00	Glenroy	Australia	0.3
	06 Apr 2024 08:00	Derby	Australia	0.3
	06 Apr 2024 02:00	Kollan I	Australia	0.2
	09 Apr 2024 22:00	Thangoo	Australia	0.2
	06 Apr 2024 01:00	Pagatan	Indonesia	0.2
	06 Apr 2024 01:00	Salinau	Indonesia	0.2
	06 Apr 2024 01:00	Semaras	Indonesia	0.2
	06 Apr 2024 01:00	Okaoka	Indonesia	0.2
	09 Apr 2024 22:00	Broome	Australia	0.2
	06 Apr 2024 03:00	Soengaibali	Indonesia	0.2
	06 Apr 2024 01:00	Tapianbalai	Indonesia	0.2
	09 Apr 2024 22:00	Waterbank	Australia	0.2
	09 Apr 2024 20:00	Pender	Australia	0.2
	05 Apr 2024 20:00	Tandjungniur	Indonesia	0.2
	05 Apr 2024 20:00	Tempilang	Indonesia	0.2
	05 Apr 2024 20:00	Keludin	Indonesia	0.2
	06 Apr 2024 00:00	Segintong	Indonesia	0.2
	09 Apr 2024 22:00	Kennedys Cottage	Australia	0.2
	05 Apr 2024 20:00	Makasar	Indonesia	0.2
	05 Apr 2024 20:00	Manda	Indonesia	0.2
	05 Apr 2024 20:00	Anjai	Indonesia	0.2
	05 Apr 2024 20:00	Tjadia	Indonesia	0.2
	05 Apr 2024 20:00	Kanaoengan	Indonesia	0.2
	05 Apr 2024 22:00	Tangjungrusa	Indonesia	0.2
	05 Apr 2024 22:00	Dendang	Indonesia	0.2
	05 Apr 2024 22:00	Simnangpesa	Indonesia	0.2
	05 Apr 2024 22:00	Tandjungklumpang	Indonesia	0.2
	06 Apr 2024 02:00	Boenati	Indonesia	0.2
	06 Apr 2024 03:00	Sekapoeng	Indonesia	0.2
	05 Apr 2024 22:00	Sanrabone	Indonesia	0.2
	05 Apr 2024 22:00	Tamalaba	Indonesia	0.2
	05 Apr 2024 20:00	Bontobonto	Indonesia	0.2
	05 Apr 2024 22:00	Tiempae	Indonesia	0.2
	05 Apr 2024 22:00	Radjik	Indonesia	0.2
	05 Apr 2024 22:00	Bisali	Indonesia	0.1
	05 Apr 2024 20:00	Nasik	Indonesia	0.1
	05 Apr 2024 20:00	Petaling	Indonesia	0.1
	05 Apr 2024 20:00	Pangkal Dudat	Indonesia	0.1
	05 Apr 2024 20:00	Tandjungpandan	Indonesia	0.1
	05 Apr 2024 20:00	Tandjungbinga	Indonesia	0.1
	05 Apr 2024 22:00	Karamak	Indonesia	0.1
	05 Apr 2024 20:00	Tandjungkiras	Indonesia	0.1
	06 Apr 2024 01:00	Teloekkapalpetjah	Indonesia	0.1
	06 Apr 2024 01:00	Gailesong	Indonesia	0.1
	05 Apr 2024 22:00	Mandalle	Indonesia	0.1
	05 Apr 2024 22:00	Padaelo	Indonesia	0.1
	06 Apr 2024 00:00	Sampungbinangu	Indonesia	0.1
	05 Apr 2024 23:00	Tandjungbatuaajer	Indonesia	0.1
	06 Apr 2024 03:00	Sawarangan	Indonesia	0.1
	06 Apr 2024 06:00	Sungaianjar	Indonesia	0.1
	05 Apr 2024 20:00	Suakgual	Indonesia	0.1
	05 Apr 2024 21:00	Membalong	Indonesia	0.1
	05 Apr 2024 22:00	Djepuh	Indonesia	0.1
	05 Apr 2024 22:00	Lait	Indonesia	0.1

Disclaimer
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.