Overall Green Tropical Cyclone alert for SEROJA-21 in Australia, Indonesia from 04 Apr 2021 12:00 UTC to 06 Apr 2021 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 SEROJA-21

in Australia, Indonesia

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to select bulletin time

Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone SEROJA-21 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	GDACS
Exposed countries	Australia, Indonesia
Exposed population	60 thousand in Category 1 or higher
Maximum wind speed	130 km/h
Maximum storm surge	0.8 m (06 Apr 23:00 UTC)
Vulnerability	Low (Australia)
Landfall	between 10 Apr 2021 18:00 - 11 Apr 2021 18:00 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	194 km/h	0.8 m	n.a.	0.5
Overall	130 km/h	0.8 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

194 km/h Current Max.

Up to 45000 people in Category 1 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	04 Apr 2021 12:00	157	560 thousand	No people	Indonesia
2	04 Apr 2021 18:00	185	2 million	No people	Indonesia
3	05 Apr 2021 06:00	194	1.2 million	No people	Indonesia
4	05 Apr 2021 12:00	185	1.2 million	No people	Indonesia
5	05 Apr 2021 12:00	157	1.2 million	No people	Indonesia
6	05 Apr 2021 18:00	194	1.2 million	No people	Indonesia
7	06 Apr 2021 00:00	194	1.2 million	No people	Indonesia
8	06 Apr 2021 06:00	194	1.2 million	No people	Indonesia
9	06 Apr 2021 12:00	185	1.2 million	No people	Australia
10	06 Apr 2021 18:00	194	1.3 million	40 thousand	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	04 Apr 2021 12:00	Tropical storm	65	no people	91000 people	-10.4, 123.2
2	04 Apr 2021 18:00	Tropical storm	83	no people	2 million people	-10.5, 123
3	05 Apr 2021 06:00	Tropical storm	93	no people	280000 people	-11.1, 121.9
4	05 Apr 2021 12:00	Tropical storm	93	no people	190000 people	-11.2, 121.5
5	05 Apr 2021 12:00	Tropical storm	93	no people	190000 people	-11.2, 121.5
6	05 Apr 2021 18:00	Tropical storm	93	no people	150000 people	-11.3, 120.7
7	06 Apr 2021 00:00	Tropical storm	102	no people	37000 people	-11.5, 120.1
8	06 Apr 2021 06:00	Tropical storm	93	no people	no people	-11.5, 118.9
9	06 Apr 2021 12:00	Tropical storm	93	no people	no people	-11.9, 119.3
10	06 Apr 2021 18:00	Tropical storm	83	no people	no people	-12.3, 119
10	07 Apr 2021 06:00	Tropical storm	83	no people	no people	-13.5, 117.4
10	07 Apr 2021 18:00	Tropical storm	93	no people	no people	-14.5, 115.7
10	08 Apr 2021 06:00	Tropical storm	102	no people	no people	-15.9, 114.2
10	08 Apr 2021 18:00	Category 1	130	no people	no people	-17.3, 112.7
10	09 Apr 2021 18:00	Category 3	185	no people	no people	-19.6, 110.6
10	10 Apr 2021 18:00	Category 3	194	45000 people	58000 people	-22.8, 109.9
10	11 Apr 2021 18:00	Category 1	139	no people	no people	-27.9, 114.8	Australia

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
Australia

Provinces

Region Province	Country
Western Australia	Australia

Populated places

Name	Region Province	Country	City class	Population
Geraldton	Western Australia	Australia	City	27000 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)
Shark Bay	MJK	34	Priv.	Paved	No	5500
Useless Loop	USL	unknown				0
Kalbarri	KAX	unknown				0
Mullewa	MXU	unknown				0
Geraldton	GET	37	Civ.	Paved	Yes	6400

Ports

Name	LOCODE	Country
Hamelin Pool		Coral Sea Islands
Denham		Coral Sea Islands
Useless Loop	AUUSL	Coral Sea Islands
Bluff Point		Coral Sea Islands
Port Gregory		Coral Sea Islands
Geraldton	AUGET	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

0.8 m

The maximum Storm surge height is 0.8m in Siduk, Indonesia. This height is estimated for 06 Apr 2021 23:00 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 (192 locations). Calculation based on advisory number 10 of 06 Apr 2021 18:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	06 Apr 2021 23:00	Siduk	Indonesia	0.8
	05 Apr 2021 00:00	Pulaukumbang	Indonesia	0.8
	06 Apr 2021 23:00	Sungaitulak	Indonesia	0.8
	06 Apr 2021 23:00	Sukadana	Indonesia	0.8
	06 Apr 2021 23:00	Soengaitoelak	Indonesia	0.7
	06 Apr 2021 23:00	Doesoen Besar	Indonesia	0.7
	06 Apr 2021 23:00	Sungaibuaja	Indonesia	0.7
	06 Apr 2021 23:00	Padangtikar	Indonesia	0.6
	06 Apr 2021 22:00	Telukawah	Indonesia	0.6
	06 Apr 2021 22:00	Satai	Indonesia	0.6
	07 Apr 2021 00:00	Pelang	Indonesia	0.6
	07 Apr 2021 00:00	Pesaguan	Indonesia	0.6
	07 Apr 2021 00:00	Sungaitapah	Indonesia	0.5
	07 Apr 2021 00:00	Pagarantimun	Indonesia	0.5
	07 Apr 2021 00:00	Ketapang	Indonesia	0.5
	06 Apr 2021 21:00	Sabui	Indonesia	0.5
	04 Apr 2021 23:00	Pagatan	Indonesia	0.5
	05 Apr 2021 00:00	Telukpahedai	Indonesia	0.5
	06 Apr 2021 23:00	Betingtinggi	Indonesia	0.5
	05 Apr 2021 00:00	Kertamulia	Indonesia	0.5
	07 Apr 2021 00:00	Pulaukutjing	Indonesia	0.5
	05 Apr 2021 01:00	Telukketapang	Indonesia	0.4
	05 Apr 2021 01:00	Sungaikakip	Indonesia	0.4
	05 Apr 2021 00:00	Kualalupak	Indonesia	0.4
	05 Apr 2021 00:00	Aluhaluh	Indonesia	0.4
	05 Apr 2021 00:00	Tambakkarangan	Indonesia	0.4
	05 Apr 2021 00:00	Tabanio	Indonesia	0.4
	05 Apr 2021 00:00	Bawahalajung	Indonesia	0.4
	07 Apr 2021 08:00	Pender	Australia	0.4
	05 Apr 2021 00:00	Pagetan	Indonesia	0.4
	07 Apr 2021 07:00	Derby	Australia	0.4
	05 Apr 2021 06:00	Semisir	Indonesia	0.4
	04 Apr 2021 23:00	Bapuju	Indonesia	0.4
	04 Apr 2021 23:00	Bahaur	Indonesia	0.4
	04 Apr 2021 23:00	Setiroek	Indonesia	0.4
	06 Apr 2021 21:00	Koealasapo	Indonesia	0.4
	05 Apr 2021 08:00	Soengaibali	Indonesia	0.4
	05 Apr 2021 06:00	Pagatan	Indonesia	0.3
	05 Apr 2021 06:00	Salinau	Indonesia	0.3
	05 Apr 2021 06:00	Semaras	Indonesia	0.3
	05 Apr 2021 06:00	Okaoka	Indonesia	0.3
	06 Apr 2021 22:00	Mutua	Indonesia	0.3
	06 Apr 2021 22:00	Tandjoengselaka	Indonesia	0.3
	05 Apr 2021 00:00	Batakam	Indonesia	0.3
	05 Apr 2021 06:00	Tapianbalai	Indonesia	0.3
	06 Apr 2021 21:00	Loentji	Indonesia	0.3
	07 Apr 2021 09:00	Kollan I	Australia	0.3
	07 Apr 2021 00:00	Padang	Indonesia	0.3
	07 Apr 2021 00:00	Teloekkapalpetjah	Indonesia	0.3
	07 Apr 2021 00:00	Tungkaranasam	Indonesia	0.3
	07 Apr 2021 07:00	East Lewis I	Australia	0.3
	05 Apr 2021 06:00	Boenati	Indonesia	0.3
	05 Apr 2021 08:00	Sekapoeng	Indonesia	0.3
	07 Apr 2021 14:00	Wickham	Australia	0.3
	07 Apr 2021 14:00	Point Samson	Australia	0.3
	07 Apr 2021 14:00	Cossack	Australia	0.3
	07 Apr 2021 12:00	Broome	Australia	0.2
	07 Apr 2021 13:00	Condon	Australia	0.2
	07 Apr 2021 12:00	Thangoo	Australia	0.2
	07 Apr 2021 12:00	Kennedys Cottage	Australia	0.2
	07 Apr 2021 12:00	Waterbank	Australia	0.2
	06 Apr 2021 22:00	Lait	Indonesia	0.2
	05 Apr 2021 00:00	Tampoena Wo	Indonesia	0.2
	04 Apr 2021 17:00	Suaha	Indonesia	0.2
	04 Apr 2021 17:00	Keoen	Indonesia	0.2
	06 Apr 2021 21:00	Matoegoe	Indonesia	0.2
	06 Apr 2021 19:00	Suakgual	Indonesia	0.2
	06 Apr 2021 19:00	Nasik	Indonesia	0.2
	06 Apr 2021 19:00	Petaling	Indonesia	0.2
	06 Apr 2021 19:00	Tandjungpandan	Indonesia	0.2
	06 Apr 2021 19:00	Tandjungbinga	Indonesia	0.2
	06 Apr 2021 21:00	Salebam	Indonesia	0.2
	06 Apr 2021 19:00	Pangkal Dudat	Indonesia	0.2
	05 Apr 2021 02:00	Larrakeyah	Australia	0.2
	05 Apr 2021 02:00	Fannie Bay	Australia	0.2
	05 Apr 2021 02:00	Parap	Australia	0.2
	05 Apr 2021 02:00	Darwin	Australia	0.2
	05 Apr 2021 02:00	Ludmilla	Australia	0.2
	05 Apr 2021 02:00	Bagot	Australia	0.2
	04 Apr 2021 16:00	Daeoerendale	Indonesia	0.2
	04 Apr 2021 16:00	Eahun	Indonesia	0.2
	04 Apr 2021 16:00	Roti	Indonesia	0.2
	05 Apr 2021 00:00	Pamandali	Indonesia	0.2
	05 Apr 2021 00:00	Tioro	Indonesia	0.2
	05 Apr 2021 00:00	Kembano	Indonesia	0.2
	05 Apr 2021 00:00	Tampo	Indonesia	0.2
	05 Apr 2021 00:00	Kolono	Indonesia	0.2
	05 Apr 2021 00:00	Napabalana	Indonesia	0.2
	05 Apr 2021 00:00	Rumba	Indonesia	0.2
	05 Apr 2021 00:00	Koroni	Indonesia	0.2
	05 Apr 2021 00:00	Bangbong	Indonesia	0.2
	05 Apr 2021 00:00	Roode Huk	Indonesia	0.2
	05 Apr 2021 00:00	Tuetue	Indonesia	0.2
	05 Apr 2021 00:00	Walue	Indonesia	0.2
	05 Apr 2021 00:00	Labuban-Tobelo	Indonesia	0.2
	04 Apr 2021 23:00	Segintong	Indonesia	0.2
	06 Apr 2021 21:00	Tamalaba	Indonesia	0.2
	05 Apr 2021 02:00	Nightcliff	Australia	0.2
	07 Apr 2021 17:00	Ah Chong I	Australia	0.2
	07 Apr 2021 17:00	Mardie	Australia	0.2
	05 Apr 2021 06:00	Sampungbinangu	Indonesia	0.2
	04 Apr 2021 18:00	Kandangan	Indonesia	0.2
	05 Apr 2021 06:00	Tjadia	Indonesia	0.2
	05 Apr 2021 06:00	Kanaoengan	Indonesia	0.2
	07 Apr 2021 06:00	Makasar	Indonesia	0.2
	05 Apr 2021 00:00	Naoer	Indonesia	0.2
	04 Apr 2021 16:00	Hala	Indonesia	0.2
	04 Apr 2021 16:00	Usulain	Indonesia	0.2
	05 Apr 2021 06:00	Bontobonto	Indonesia	0.2
	04 Apr 2021 21:00	Oeseda	Indonesia	0.2
	04 Apr 2021 21:00	Namodale	Indonesia	0.2
	04 Apr 2021 15:00	Nordale	Indonesia	0.2
	04 Apr 2021 15:00	Korlo	Indonesia	0.2
	06 Apr 2021 20:00	Manda	Indonesia	0.2
	05 Apr 2021 00:00	Tiempae	Indonesia	0.2
	05 Apr 2021 06:00	Mandalle	Indonesia	0.2
	07 Apr 2021 06:00	Sanrabone	Indonesia	0.2
	05 Apr 2021 06:00	Padaelo	Indonesia	0.2
	05 Apr 2021 00:00	Sanindara	Indonesia	0.2
	04 Apr 2021 21:00	Ulua	Indonesia	0.1
	04 Apr 2021 18:00	Baa	Indonesia	0.1
	04 Apr 2021 18:00	Oenggae	Indonesia	0.1
	04 Apr 2021 14:00	Oetefoe-besar	Indonesia	0.1
	04 Apr 2021 14:00	Akle	Indonesia	0.1
	05 Apr 2021 09:00	Ege	Indonesia	0.1
	05 Apr 2021 09:00	Kotahawoe	Indonesia	0.1
	07 Apr 2021 03:00	Leanyer	Australia	0.1
	04 Apr 2021 21:00	Minjilang	Australia	0.1
	04 Apr 2021 23:00	Sawarangan	Indonesia	0.1
	04 Apr 2021 14:00	Besdale	Indonesia	0.1
	05 Apr 2021 00:00	Lakara	Indonesia	0.1
	05 Apr 2021 00:00	Toroboeloe	Indonesia	0.1
	07 Apr 2021 06:00	Gailesong	Indonesia	0.1
	07 Apr 2021 06:00	Karamak	Indonesia	0.1
	05 Apr 2021 00:00	Agatebi	Indonesia	0.1
	04 Apr 2021 15:00	Oetefoe-ketjil	Indonesia	0.1
	05 Apr 2021 08:00	Baah	Indonesia	0.1
	05 Apr 2021 10:00	Boedae	Indonesia	0.1
	05 Apr 2021 00:00	Kasiputih	Indonesia	0.1
	05 Apr 2021 00:00	Sajengga	Indonesia	0.1
	05 Apr 2021 00:00	Laora	Indonesia	0.1
	05 Apr 2021 00:00	Wansabari	Indonesia	0.1
	06 Apr 2021 20:00	Djepuh	Indonesia	0.1
	04 Apr 2021 20:00	Toedameda	Indonesia	0.1
	04 Apr 2021 20:00	Batutuah	Indonesia	0.1
	04 Apr 2021 15:00	Silain	Indonesia	0.1
	04 Apr 2021 18:00	Oeboeah	Indonesia	0.1
	04 Apr 2021 15:00	Oisina	Indonesia	0.1
	04 Apr 2021 15:00	Tablolong	Indonesia	0.1
	04 Apr 2021 18:00	Hansisi	Indonesia	0.1
	04 Apr 2021 18:00	Tenau	Indonesia	0.1
	04 Apr 2021 18:00	Namosain	Indonesia	0.1
	04 Apr 2021 18:00	Kupang	Indonesia	0.1
	05 Apr 2021 08:00	Below	Indonesia	0.1
	05 Apr 2021 07:00	Mboe Eain	Indonesia	0.1
	04 Apr 2021 20:00	Nembrala	Indonesia	0.1
	04 Apr 2021 20:00	Nemperola	Indonesia	0.1
	04 Apr 2021 20:00	Abuan	Indonesia	0.1
	05 Apr 2021 11:00	Langadai	Indonesia	0.1
	05 Apr 2021 11:00	Sansang	Indonesia	0.1
	05 Apr 2021 11:00	Senaking	Indonesia	0.1
	05 Apr 2021 11:00	Sungaianjar	Indonesia	0.1
	05 Apr 2021 11:00	Merapo	Indonesia	0.1
	07 Apr 2021 00:00	Sagu	Indonesia	0.1
	05 Apr 2021 06:00	Bisali	Indonesia	0.1
	05 Apr 2021 06:00	Laboso	Indonesia	0.1
	06 Apr 2021 19:00	Lakadea	Indonesia	0.1
	06 Apr 2021 19:00	Tongkuno	Indonesia	0.1
	04 Apr 2021 15:00	Butuinan	Indonesia	0.1
	04 Apr 2021 19:00	Poeloedae	Indonesia	0.1
	04 Apr 2021 19:00	Soelamoe	Indonesia	0.1
	05 Apr 2021 09:00	Kota Boddo	Indonesia	0.1
	05 Apr 2021 09:00	Wawarei	Indonesia	0.1
	05 Apr 2021 09:00	Seba	Indonesia	0.1
	04 Apr 2021 19:00	Menloda	Indonesia	0.1
	04 Apr 2021 19:00	Saisum	Indonesia	0.1
	07 Apr 2021 00:00	Sungaipadang	Indonesia	0.1
	06 Apr 2021 23:00	Padang	Indonesia	0.1
	06 Apr 2021 23:00	Manggar	Indonesia	0.1
	06 Apr 2021 23:00	Lipatkadjang	Indonesia	0.1
	05 Apr 2021 00:00	Tanam	Indonesia	0.1
	05 Apr 2021 00:00	Kamboeriami	Indonesia	0.1
	05 Apr 2021 00:00	Kinara	Indonesia	0.1
	05 Apr 2021 00:00	Aoem	Indonesia	0.1
	05 Apr 2021 00:00	Moegoetira	Indonesia	0.1
	05 Apr 2021 00:00	Sakaoeni	Indonesia	0.1
	04 Apr 2021 19:00	Husdale	Indonesia	0.1
	04 Apr 2021 19:00	Pitai	Indonesia	0.1
	04 Apr 2021 19:00	Manikin	Indonesia	0.1
	04 Apr 2021 19:00	Pariti	Indonesia	0.1
	04 Apr 2021 19:00	Naimoeti	Indonesia	0.1
	04 Apr 2021 21:00	Batuoge	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.