Overall Orange Tropical Cyclone alert for GAMANE-24 in Madagascar from 25 Mar 2024 18:00 UTC to 28 Mar 2024 00:00 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 Orange alert Tropical Cyclone for GAMANE-24

in Madagascar

28 Mar 2024 00 UTC

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Meteorological source:

WMO-RSMC La Réunion
Primary source
GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

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

Meteorological source	GDACS
Exposed countries	Madagascar
Exposed population	150 thousand in Category 1 or higher
Maximum wind speed	167 km/h
Maximum storm surge	0.4 m (29 Mar 05:00 UTC)
Vulnerability	High (Madagascar)
Landfall	between 31 Mar 2024 00:00 - 01 Apr 2024 00:00 in Mauritius

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	83 km/h	0.4 m	n.a.	0.5
Overall	167 km/h	0.4 m	n.a.	1.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track) based on GDACS impact

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Wind

83 km/h Current Max.

Up to 4.7 million 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	26 Mar 2024 00:00	148	2.5 million	180 thousand	Madagascar
2	26 Mar 2024 12:00	157	3.6 million	310 thousand	Madagascar
3	27 Mar 2024 00:00	167	3.7 million	470 thousand	Madagascar
4	27 Mar 2024 12:00	102	4.4 million	150 thousand	Madagascar
5	28 Mar 2024 00:00	83	4.7 million	150 thousand	Madagascar

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	26 Mar 2024 00:00	Tropical storm	65	no people	690000 people	-12.7, 50.8
2	26 Mar 2024 12:00	Tropical storm	102	no people	180000 people	-12.5, 50.7
3	27 Mar 2024 00:00	Category 2	167	160000 people	1.2 million people	-12.9, 50.1
4	27 Mar 2024 12:00	Tropical storm	102	no people	1.4 million people	-13.3, 49.2	Madagascar
5	28 Mar 2024 00:00	Tropical storm	74	no people	2.5 million people	-13.9, 48.8	Madagascar
5	28 Mar 2024 12:00	Tropical storm	65	no people	2.8 million people	-14.5, 48.9	Madagascar
5	29 Mar 2024 00:00	Tropical storm	65	no people	1.4 million people	-15.1, 49.7	Madagascar
5	29 Mar 2024 12:00	Tropical storm	74	no people	330000 people	-15.7, 50.7
5	30 Mar 2024 00:00	Tropical storm	83	no people	no people	-16.2, 51.7
5	31 Mar 2024 00:00	Tropical storm	83	no people	1.3 million people	-17.8, 54.4
5	01 Apr 2024 00:00	Tropical storm	65	no people	no people	-20.2, 57.7	Mauritius

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
Madagascar	3.3 million people
Reunion	30000 people
Mauritius	1.2 million people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Antsiranana	Madagascar	2 million people
Mahajanga	Madagascar	900000 people
Toamasina	Madagascar	370000 people
Reunion	Miscellaneous (French) Indian Ocean Islands	30000 people
Mauritius	Mauritius	1.2 million people

Populated places

Name	Region Province	Country	City class	Population
Ambanja	Antsiranana	Madagascar	City	30000 people
Ambilobe	Antsiranana	Madagascar	City	14000 people
Andapa	Antsiranana	Madagascar	City	20000 people
Vohemar	Antsiranana	Madagascar	City	-
Sambava	Antsiranana	Madagascar	City	31000 people
Antseranana	Antsiranana	Madagascar	City	-
Antalaha	Antsiranana	Madagascar	City	34000 people
Maroantsetra	Toamasina	Madagascar	City	24000 people
Mandritsara	Mahajanga	Madagascar	City	-
Mananara	Toamasina	Madagascar	City	41000 people
Port Louis		Mauritius	Capital	150000 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)
Ambanja	IVA	11	Civ.	Unpaved	No	3100
Ampampamena		15				0
Bealanana	WBE	1120				0
Ambilobe Mahavavy	AMB	22	Civ.	Paved	No	4900
Nosy Be Fascene	NOS	10	Civ.	Paved	No	7100
Doany	DOA	unknown				0
Andapa	ZWA	473	Civ.	Paved	No	4100
Analalava	HVA	105	Civ.	Unpaved	No	3900
Antsohihy Ambalabe	WAI	28	Civ.	Paved	No	4900
Vohemar	VOH	6	Civ.	Paved	No	4200
Befandriana	WBD	250	Civ.	Unpaved	No	4100
Sambava	SVB	6	Civ.	Paved	No	5900
Anahidrano		60				0
Antsiranana Arrachart	DIE	114	Civ.	Paved	No	4900
Maroantsetra	WMN	4	Civ.	Paved	No	4200
Antalaha Antsirabato	ANM	6	Civ.	Paved	No	3900
Mandritsara	WMA	307	Civ.	Unpaved	No	3700
Mananara Nord	WMR	3	Civ.	Paved	No	4100
Plaisance International	MRU	57	Civ.	Paved	Yes	9900

Ports

Name	LOCODE	Country
Nossi-Be	MGNOS	Madagascar
Maromandia		Madagascar
Port St. Louis	MGPSL	Madagascar
Analalava		Madagascar
Vohemar		Madagascar
Sambava	MGSVB	Madagascar
Cap Diego		Madagascar
Antsiranana	MGDIE	Madagascar
Antataha	MGANM	Madagascar
Maroantsetra	MGWMN	Madagascar
Mananara	MGWMR	Madagascar
Port Louis	MUPLU	Mauritius
Mahebourg		Mauritius

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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

0.4 m

The maximum Storm surge height is 0.4m in Mahalevona, Madagascar. This height is estimated for 29 Mar 2024 05:00 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 (137 locations). Calculation based on advisory number 5 of 28 Mar 2024 00:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	29 Mar 2024 05:00	Mahalevona	Madagascar	0.4
	29 Mar 2024 05:00	Maroantsetra	Madagascar	0.4
	29 Mar 2024 05:00	Andranofotsy	Madagascar	0.4
	29 Mar 2024 05:00	Anantoraka	Madagascar	0.4
	29 Mar 2024 04:00	Manambia	Madagascar	0.3
	29 Mar 2024 04:00	Voloina	Madagascar	0.3
	27 Mar 2024 14:00	Fadrina	Madagascar	0.3
	27 Mar 2024 19:00	Ambodibonara	Madagascar	0.3
	27 Mar 2024 19:00	Tanambao	Madagascar	0.3
	27 Mar 2024 19:00	Anjabe	Madagascar	0.3
	27 Mar 2024 19:00	Andranomena	Madagascar	0.3
	27 Mar 2024 19:00	Bobasakoa	Madagascar	0.3
	29 Mar 2024 07:00	Ambanizana	Madagascar	0.3
	29 Mar 2024 07:00	Benjana	Madagascar	0.3
	27 Mar 2024 19:00	Andranofotsy	Madagascar	0.3
	29 Mar 2024 09:00	Antanjokatafana	Madagascar	0.3
	27 Mar 2024 03:00	Andringahely	Madagascar	0.3
	27 Mar 2024 03:00	Ampisikanana	Madagascar	0.3
	27 Mar 2024 22:00	Antanimandry	Madagascar	0.3
	29 Mar 2024 04:00	Rantabe	Madagascar	0.3
	29 Mar 2024 07:00	Tampolo	Madagascar	0.2
	27 Mar 2024 10:00	Ankazomalemy	Madagascar	0.2
	29 Mar 2024 05:00	Maintimbato	Madagascar	0.2
	29 Mar 2024 08:00	Antalavia	Madagascar	0.2
	29 Mar 2024 10:00	Ilomotro	Madagascar	0.2
	29 Mar 2024 10:00	Andohonko	Madagascar	0.2
	29 Mar 2024 05:00	Anoromby	Madagascar	0.2
	28 Mar 2024 16:00	Ambatobe	Madagascar	0.2
	29 Mar 2024 04:00	Manambolosy	Madagascar	0.2
	29 Mar 2024 05:00	Fananehana	Madagascar	0.2
	29 Mar 2024 08:00	Anjanozana	Madagascar	0.2
	29 Mar 2024 08:00	Ratsianarana	Madagascar	0.2
	29 Mar 2024 08:00	Ampanavoana	Madagascar	0.2
	28 Mar 2024 17:00	Ampiambesa	Madagascar	0.2
	28 Mar 2024 17:00	Antetezampolaka	Madagascar	0.2
	27 Mar 2024 06:00	Lokia	Madagascar	0.2
	29 Mar 2024 08:00	Rantranavona	Madagascar	0.2
	29 Mar 2024 04:00	Fahambahy	Madagascar	0.2
	29 Mar 2024 08:00	Anaovandrano	Madagascar	0.2
	28 Mar 2024 17:00	Antsahabe	Madagascar	0.2
	28 Mar 2024 17:00	Ambodizaotra	Madagascar	0.2
	29 Mar 2024 08:00	Ambodivato	Madagascar	0.2
	31 Mar 2024 23:00	Trou aux Biches	Mauritius	0.2
	28 Mar 2024 01:00	Antanamazava	Madagascar	0.2
	28 Mar 2024 01:00	Ambatomainty	Madagascar	0.2
	28 Mar 2024 01:00	Manehoko	Madagascar	0.2
	26 Mar 2024 01:00	Ampasina	Madagascar	0.2
	29 Mar 2024 06:00	Soanierana Ivongo	Madagascar	0.2
	29 Mar 2024 06:00	Andrangazaha	Madagascar	0.2
	29 Mar 2024 09:00	Fampotabe	Madagascar	0.2
	29 Mar 2024 04:00	Tampolo	Madagascar	0.2
	29 Mar 2024 06:00	Andilamboahangy	Madagascar	0.2
	29 Mar 2024 05:00	Ambalabe	Madagascar	0.2
	28 Mar 2024 17:00	Anorotsangana	Madagascar	0.2
	29 Mar 2024 06:00	Mahavanona	Madagascar	0.2
	29 Mar 2024 06:00	Antakobola	Madagascar	0.2
	29 Mar 2024 06:00	Analanampotsy	Madagascar	0.2
	29 Mar 2024 06:00	Ampasimbe	Madagascar	0.2
	29 Mar 2024 06:00	Manakalana	Madagascar	0.2
	29 Mar 2024 06:00	Manompana	Madagascar	0.2
	29 Mar 2024 04:00	Mananara	Madagascar	0.2
	29 Mar 2024 07:00	Ambatoharana	Madagascar	0.2
	29 Mar 2024 09:00	Vinanivao	Madagascar	0.2
	29 Mar 2024 09:00	Maniroka	Madagascar	0.2
	31 Mar 2024 23:00	Port Louis	Mauritius	0.2
	29 Mar 2024 06:00	Antanambe	Madagascar	0.2
	29 Mar 2024 05:00	Ivontaka	Madagascar	0.2
	01 Apr 2024 00:00	Saint-Antoine	Mauritius	0.2
	01 Apr 2024 01:00	Riviere du Rempart	Mauritius	0.2
	28 Mar 2024 18:00	Maromokotra	Madagascar	0.1
	28 Mar 2024 18:00	Marokitrana	Madagascar	0.1
	29 Mar 2024 06:00	Fandrarazana	Madagascar	0.1
	29 Mar 2024 06:00	Manambato	Madagascar	0.1
	29 Mar 2024 07:00	Ambatofitarafana	Madagascar	0.1
	29 Mar 2024 05:00	Ambodimanga	Madagascar	0.1
	29 Mar 2024 05:00	Seranambe	Madagascar	0.1
	01 Apr 2024 01:00	Grande Reviere Sud Est	Mauritius	0.1
	28 Mar 2024 16:00	Anjiabe	Madagascar	0.1
	28 Mar 2024 18:00	Bevoay	Madagascar	0.1
	28 Mar 2024 01:00	Ambato	Madagascar	0.1
	29 Mar 2024 08:00	Ambanisanjo	Madagascar	0.1
	28 Mar 2024 16:00	Antanifatsy	Madagascar	0.1
	26 Mar 2024 01:00	Fenerive	Madagascar	0.1
	29 Mar 2024 06:00	Antanetilava	Madagascar	0.1
	29 Mar 2024 06:00	Vatobe	Madagascar	0.1
	29 Mar 2024 02:00	Ambinany	Madagascar	0.1
	29 Mar 2024 02:00	Antalaha	Madagascar	0.1
	29 Mar 2024 05:00	Ambohitralanana	Madagascar	0.1
	29 Mar 2024 05:00	Antsikafoka	Madagascar	0.1
	28 Mar 2024 19:00	Marovato	Madagascar	0.1
	28 Mar 2024 18:00	Mandrony	Madagascar	0.1
	28 Mar 2024 19:00	Madirotelo	Madagascar	0.1
	28 Mar 2024 01:00	Andrafia	Madagascar	0.1
	28 Mar 2024 00:00	Ambaramidada	Madagascar	0.1
	28 Mar 2024 16:00	Antsorokaka	Madagascar	0.1
	29 Mar 2024 05:00	Vohilava	Madagascar	0.1
	29 Mar 2024 05:00	Ambodifototra	Madagascar	0.1
	29 Mar 2024 05:00	Lonkintsy	Madagascar	0.1
	29 Mar 2024 06:00	Lokintsy	Madagascar	0.1
	27 Mar 2024 04:00	Ambatoharanana	Madagascar	0.1
	29 Mar 2024 06:00	Lohatrozona	Madagascar	0.1
	29 Mar 2024 06:00	Tanambe	Madagascar	0.1
	29 Mar 2024 02:00	Ampaha	Madagascar	0.1
	28 Mar 2024 17:00	Mahambo	Madagascar	0.1
	28 Mar 2024 19:00	Ampasibe	Madagascar	0.1
	28 Mar 2024 01:00	Nosy Faly	Madagascar	0.1
	28 Mar 2024 18:00	Ampanakana	Madagascar	0.1
	28 Mar 2024 17:00	Fararano	Madagascar	0.1
	29 Mar 2024 06:00	Ambodiatafa	Madagascar	0.1
	27 Mar 2024 03:00	Vohemar	Madagascar	0.1
	29 Mar 2024 02:00	Andrapengy	Madagascar	0.1
	29 Mar 2024 03:00	Anjahamarina	Madagascar	0.1
	28 Mar 2024 16:00	Ampombilava	Madagascar	0.1
	28 Mar 2024 17:00	Namahoaka	Madagascar	0.1
	28 Mar 2024 15:00	Antsahampano	Madagascar	0.1
	28 Mar 2024 17:00	Mahatsara	Madagascar	0.1
	28 Mar 2024 22:00	Sambava	Madagascar	0.1
	28 Mar 2024 21:00	Analalava	Madagascar	0.1
	28 Mar 2024 21:00	Ananalava	Madagascar	0.1
	28 Mar 2024 21:00	Ampasimpilily	Madagascar	0.1
	28 Mar 2024 19:00	Antananabe	Madagascar	0.1
	28 Mar 2024 20:00	Bejongoro	Madagascar	0.1
	28 Mar 2024 21:00	Ampandrano	Madagascar	0.1
	28 Mar 2024 18:00	Anjiamalandy	Madagascar	0.1
	28 Mar 2024 20:00	Andrafialava	Madagascar	0.1
	28 Mar 2024 16:00	Ambatoxavavy	Madagascar	0.1
	27 Mar 2024 03:00	Antanambao	Madagascar	0.1
	27 Mar 2024 03:00	Andrafiamadinika	Madagascar	0.1
	28 Mar 2024 18:00	Ambariomena	Madagascar	0.1
	29 Mar 2024 02:00	Farahalana	Madagascar	0.1
	29 Mar 2024 02:00	Amborimalana	Madagascar	0.1
	29 Mar 2024 02:00	Ambodipont-Sahana	Madagascar	0.1
	28 Mar 2024 22:00	Antohamaro	Madagascar	0.1
	29 Mar 2024 03:00	Antsirabato	Madagascar	0.1
	31 Mar 2024 22:00	Black River	Mauritius	0.1
	01 Apr 2024 01:00	Maheboug	Mauritius	0.1
	01 Apr 2024 01:00	Riche-en-Eau	Mauritius	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.