Overall Orange Tropical Cyclone alert for GAMANE-24 in Madagascar from 25 Mar 2024 18:00 UTC to 26 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

26 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	WMO/RSMC La Réunion - Meteo France
Exposed countries	Madagascar
Exposed population	560 thousand in Category 1 or higher
Maximum wind speed	169 km/h
Maximum storm surge	0.4 m (28 Mar 04:00 UTC)
Vulnerability	High (Madagascar)

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	95 km/h	0.4 m	n.a.	0.5
Overall	169 km/h	0.4 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

95 km/h Current Max.

Up to 4 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	25 Mar 2024 18:00	211	4.4 million	3 thousand	Madagascar
2	26 Mar 2024 00:00	179	2.2 million	440 thousand	Madagascar
3	26 Mar 2024 00:00	95	4 million	No people	Madagascar, Miscellaneous (French) Indian Ocean Islands

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	25 Mar 2024 12:00	Tropical storm	63	no people	no people	Tropical Depression	56	-12.8, 51.5
1	25 Mar 2024 18:00	Tropical storm	63	no people	200000 people	Tropical Depression	56	-12.8, 51.1
2	25 Mar 2024 18:00	Tropical storm	74	no people	no people	Moderate Tropical Storm	65	-12.8, 51.1
2	26 Mar 2024 00:00	Tropical storm	63	no people	1.3 million people	Tropical Depression	56	-12.8, 50.9
3	26 Mar 2024 00:00	Tropical storm	95	no people	4 million people	Moderate Tropical Storm	83	-12.5, 50.9
3	26 Mar 2024 06:00	Tropical depression	54	no people	no people	Tropical Disturbance	48	-12.2, 50.7

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

Countries

Country	Population in Tropical Storm or higher strength
Madagascar	3.9 million people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Antsiranana	Madagascar	2 million people
Mahajanga	Madagascar	1.3 million people
Toamasina	Madagascar	530000 people

Populated places

Name	Region Province	Country	City class	Population
Vohemar	Antsiranana	Madagascar	City	-
Antseranana	Antsiranana	Madagascar	City	-
Sambava	Antsiranana	Madagascar	City	31000 people
Ambilobe	Antsiranana	Madagascar	City	14000 people
Antalaha	Antsiranana	Madagascar	City	34000 people
Andapa	Antsiranana	Madagascar	City	20000 people
Ambanja	Antsiranana	Madagascar	City	30000 people
Maroantsetra	Toamasina	Madagascar	City	24000 people
Mananara	Toamasina	Madagascar	City	41000 people
Mandritsara	Mahajanga	Madagascar	City	-

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)
Vohemar	VOH	6	Civ.	Paved	No	4200
Antsiranana Arrachart	DIE	114	Civ.	Paved	No	4900
Antsiranana Andrakaka		61	Mil.	Paved	No	8200
Sambava	SVB	6	Civ.	Paved	No	5900
Ambilobe Mahavavy	AMB	22	Civ.	Paved	No	4900
Doany	DOA	unknown				0
Ampampamena		15				0
Farquhar		3	Priv.	Paved	No	3100
Andapa	ZWA	473	Civ.	Paved	No	4100
Antalaha Antsirabato	ANM	6	Civ.	Paved	No	3900
Ambanja	IVA	11	Civ.	Unpaved	No	3100
Nosy Be Fascene	NOS	10	Civ.	Paved	No	7100
Bealanana	WBE	1120				0
Maroantsetra	WMN	4	Civ.	Paved	No	4200
Befandriana	WBD	250	Civ.	Unpaved	No	4100
Antsohihy Ambalabe	WAI	28	Civ.	Paved	No	4900
Analalava	HVA	105	Civ.	Unpaved	No	3900
Mananara Nord	WMR	3	Civ.	Paved	No	4100
Anahidrano		60				0
Mandritsara	WMA	307	Civ.	Unpaved	No	3700
Port Berge	WPB	65	Civ.	Unpaved	No	4200

Ports

Name	LOCODE	Country
Vohemar		Madagascar
Antsiranana	MGDIE	Madagascar
Cap Diego		Madagascar
Cape Amber		Madagascar
Sambava	MGSVB	Madagascar
Port St. Louis	MGPSL	Madagascar
Antataha	MGANM	Madagascar
Nossi-Be	MGNOS	Madagascar
Maroantsetra	MGWMN	Madagascar
Saint Pierre Island		Seychelles
Maromandia		Madagascar
Providence Island		Seychelles
Analalava		Madagascar
Mananara	MGWMR	Madagascar
Astove Island		Seychelles
Cosmoledo Island		Seychelles
Saint Mary Island		Madagascar

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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 Antohamaro, Madagascar. This height is estimated for 28 Mar 2024 04:00 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 (79 locations). Calculation based on advisory number 3 of 25 Mar 2024 18:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	28 Mar 2024 04:00	Antohamaro	Madagascar	0.4
	28 Mar 2024 18:00	Mahalevona	Madagascar	0.4
	28 Mar 2024 17:00	Anantoraka	Madagascar	0.3
	28 Mar 2024 19:00	Maroantsetra	Madagascar	0.3
	28 Mar 2024 19:00	Andranofotsy	Madagascar	0.3
	28 Mar 2024 18:00	Ambohitralanana	Madagascar	0.3
	28 Mar 2024 17:00	Manambia	Madagascar	0.3
	28 Mar 2024 04:00	Farahalana	Madagascar	0.3
	27 Mar 2024 21:00	Ampana Kanana	Madagascar	0.3
	28 Mar 2024 17:00	Voloina	Madagascar	0.3
	28 Mar 2024 19:00	Ratsianarana	Madagascar	0.3
	28 Mar 2024 19:00	Ambodivato	Madagascar	0.3
	28 Mar 2024 22:00	Ambanizana	Madagascar	0.2
	28 Mar 2024 22:00	Benjana	Madagascar	0.2
	27 Mar 2024 23:00	Antongompatatra	Madagascar	0.2
	27 Mar 2024 23:00	Bemanevika	Madagascar	0.2
	28 Mar 2024 06:00	Amborimalana	Madagascar	0.2
	28 Mar 2024 10:00	Anjahamarina	Madagascar	0.2
	28 Mar 2024 17:00	Rantabe	Madagascar	0.2
	28 Mar 2024 06:00	Ampaha	Madagascar	0.2
	28 Mar 2024 23:00	Tampolo	Madagascar	0.2
	29 Mar 2024 00:00	Antalavia	Madagascar	0.2
	27 Mar 2024 16:00	Ambanjsondriry	Madagascar	0.2
	27 Mar 2024 16:00	Masondrono	Madagascar	0.2
	28 Mar 2024 06:00	Ambodipont-Sahana	Madagascar	0.2
	28 Mar 2024 15:00	Ambalabe	Madagascar	0.2
	29 Mar 2024 04:00	Fampotabe	Madagascar	0.2
	28 Mar 2024 00:00	Sambava	Madagascar	0.2
	28 Mar 2024 06:00	Andrapengy	Madagascar	0.2
	28 Mar 2024 06:00	Ambinany	Madagascar	0.2
	28 Mar 2024 19:00	Antanjokatafana	Madagascar	0.2
	26 Mar 2024 20:00	Ilomotro	Madagascar	0.2
	26 Mar 2024 20:00	Andohonko	Madagascar	0.2
	28 Mar 2024 18:00	Maintimbato	Madagascar	0.2
	28 Mar 2024 21:00	Anjanozana	Madagascar	0.2
	28 Mar 2024 23:00	Ampanavoana	Madagascar	0.2
	28 Mar 2024 22:00	Anoromby	Madagascar	0.2
	29 Mar 2024 01:00	Anaovandrano	Madagascar	0.2
	26 Mar 2024 19:00	Ankazomalemy	Madagascar	0.2
	28 Mar 2024 22:00	Fananehana	Madagascar	0.2
	27 Mar 2024 14:00	Ambondrombe	Madagascar	0.2
	29 Mar 2024 02:00	Rantranavona	Madagascar	0.2
	27 Mar 2024 20:00	Tanambao	Madagascar	0.2
	28 Mar 2024 23:00	Maniroka	Madagascar	0.2
	28 Mar 2024 22:00	Manambolosy	Madagascar	0.1
	29 Mar 2024 03:00	Ambatoharana	Madagascar	0.1
	28 Mar 2024 12:00	Antsirabato	Madagascar	0.1
	27 Mar 2024 10:00	Ampondra	Madagascar	0.1
	27 Mar 2024 10:00	Amboanio	Madagascar	0.1
	28 Mar 2024 22:00	Fahambahy	Madagascar	0.1
	28 Mar 2024 23:00	Vinanivao	Madagascar	0.1
	28 Mar 2024 10:00	Antalaha	Madagascar	0.1
	27 Mar 2024 15:00	Fadrina	Madagascar	0.1
	26 Mar 2024 19:00	Soanierana Ivongo	Madagascar	0.1
	27 Mar 2024 10:00	Vohemar	Madagascar	0.1
	27 Mar 2024 08:00	Ambatoharanana	Madagascar	0.1
	27 Mar 2024 12:00	Antsahotompy	Madagascar	0.1
	29 Mar 2024 02:00	Andilamboahangy	Madagascar	0.1
	26 Mar 2024 19:00	Mahavanona	Madagascar	0.1
	26 Mar 2024 19:00	Ampasina	Madagascar	0.1
	26 Mar 2024 19:00	Antakobola	Madagascar	0.1
	26 Mar 2024 19:00	Analanampotsy	Madagascar	0.1
	26 Mar 2024 19:00	Ampasimbe	Madagascar	0.1
	26 Mar 2024 19:00	Manakalana	Madagascar	0.1
	26 Mar 2024 19:00	Andrangazaha	Madagascar	0.1
	28 Mar 2024 22:00	Tampolo	Madagascar	0.1
	28 Mar 2024 22:00	Mananara	Madagascar	0.1
	29 Mar 2024 02:00	Ivontaka	Madagascar	0.1
	26 Mar 2024 19:00	Fandrarazana	Madagascar	0.1
	29 Mar 2024 06:00	Antanambe	Madagascar	0.1
	26 Mar 2024 21:00	Ambanisanjo	Madagascar	0.1
	26 Mar 2024 21:00	Ambatobe	Madagascar	0.1
	27 Mar 2024 10:00	Antanambao	Madagascar	0.1
	27 Mar 2024 10:00	Andrafiamadinika	Madagascar	0.1
	29 Mar 2024 02:00	Ambatofitarafana	Madagascar	0.1
	29 Mar 2024 04:00	Ambodimanga	Madagascar	0.1
	29 Mar 2024 06:00	Seranambe	Madagascar	0.1
	29 Mar 2024 07:00	Manambato	Madagascar	0.1
	26 Mar 2024 19:00	Manompana	Madagascar	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.