Overall Orange Tropical Cyclone alert for GAMANE-24 in Madagascar from 25 Mar 2024 18:00 UTC to 27 Mar 2024 12:00 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

27 Mar 2024 12 UTC

click on

to select bulletin time

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 (27 Mar 02:00 UTC)
Vulnerability	High (Madagascar)
Landfall	between 27 Mar 2024 00:00 - 27 Mar 2024 12:00 in 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	102 km/h	0.3 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

TOP

Wind

102 km/h Current Max.

Up to 4.4 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	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

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
4	28 Mar 2024 00:00	Tropical storm	74	no people	1.8 million people	-14.1, 49	Madagascar
4	28 Mar 2024 12:00	Tropical storm	65	no people	1.7 million people	-14.9, 49.3	Madagascar
4	29 Mar 2024 00:00	Tropical storm	65	no people	740000 people	-15.5, 50.2	Madagascar
4	29 Mar 2024 12:00	Tropical storm	83	no people	no people	-16, 51.4
4	30 Mar 2024 12:00	Tropical storm	83	no people	1.3 million people	-17.6, 53.9
4	31 Mar 2024 12:00	Tropical storm	74	no people	1.4 million people	-19.9, 56.5
4	01 Apr 2024 12:00	Tropical storm	65	no people	no people	-22.1, 59

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
Madagascar	2.9 million people
Reunion	98000 people
Mauritius	1.2 million people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Antsiranana	Madagascar	1.9 million people
Mahajanga	Madagascar	580000 people
Toamasina	Madagascar	400000 people
Reunion	Miscellaneous (French) Indian Ocean Islands	98000 people
Mauritius	Mauritius	1.2 million people

Populated places

Name	Region Province	Country	City class	Population
Ambilobe	Antsiranana	Madagascar	City	14000 people
Vohemar	Antsiranana	Madagascar	City	-
Ambanja	Antsiranana	Madagascar	City	30000 people
Antseranana	Antsiranana	Madagascar	City	-
Andapa	Antsiranana	Madagascar	City	20000 people
Antalaha	Antsiranana	Madagascar	City	34000 people
Maroantsetra	Toamasina	Madagascar	City	24000 people
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)
Ambilobe Mahavavy	AMB	22	Civ.	Paved	No	4900
Ampampamena		15				0
Vohemar	VOH	6	Civ.	Paved	No	4200
Ambanja	IVA	11	Civ.	Unpaved	No	3100
Nosy Be Fascene	NOS	10	Civ.	Paved	No	7100
Antsiranana Arrachart	DIE	114	Civ.	Paved	No	4900
Doany	DOA	unknown				0
Bealanana	WBE	1120				0
Sambava	SVB	6	Civ.	Paved	No	5900
Andapa	ZWA	473	Civ.	Paved	No	4100
Antalaha Antsirabato	ANM	6	Civ.	Paved	No	3900
Befandriana	WBD	250	Civ.	Unpaved	No	4100
Maroantsetra	WMN	4	Civ.	Paved	No	4200
Mananara Nord	WMR	3	Civ.	Paved	No	4100
Plaisance International	MRU	57	Civ.	Paved	Yes	9900

Ports

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

TOP

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.

...

TOP

StormSurge

0.4 m

The maximum Storm surge height is 0.4m in Andringahely, Madagascar. This height is estimated for 27 Mar 2024 02:00 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 (110 locations). Calculation based on advisory number 4 of 27 Mar 2024 12:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	27 Mar 2024 02:00	Andringahely	Madagascar	0.4
	27 Mar 2024 02:00	Ampisikanana	Madagascar	0.4
	28 Mar 2024 23:00	Mahalevona	Madagascar	0.3
	28 Mar 2024 23:00	Maroantsetra	Madagascar	0.3
	28 Mar 2024 23:00	Andranofotsy	Madagascar	0.3
	27 Mar 2024 12:00	Fadrina	Madagascar	0.3
	28 Mar 2024 21:00	Anantoraka	Madagascar	0.3
	28 Mar 2024 21:00	Manambia	Madagascar	0.3
	26 Mar 2024 02:00	Voloina	Madagascar	0.3
	29 Mar 2024 09:00	Ilomotro	Madagascar	0.3
	29 Mar 2024 09:00	Andohonko	Madagascar	0.3
	29 Mar 2024 09:00	Antsisikala	Madagascar	0.3
	27 Mar 2024 21:00	Ambodibonara	Madagascar	0.2
	27 Mar 2024 21:00	Tanambao	Madagascar	0.2
	27 Mar 2024 21:00	Anjabe	Madagascar	0.2
	27 Mar 2024 21:00	Andranomena	Madagascar	0.2
	27 Mar 2024 09:00	Ankazomalemy	Madagascar	0.2
	27 Mar 2024 21:00	Bobasakoa	Madagascar	0.2
	29 Mar 2024 01:00	Ambanizana	Madagascar	0.2
	29 Mar 2024 01:00	Benjana	Madagascar	0.2
	27 Mar 2024 21:00	Andranofotsy	Madagascar	0.2
	29 Mar 2024 02:00	Antanjokatafana	Madagascar	0.2
	28 Mar 2024 00:00	Manehoko	Madagascar	0.2
	27 Mar 2024 23:00	Antanimandry	Madagascar	0.2
	26 Mar 2024 02:00	Rantabe	Madagascar	0.2
	29 Mar 2024 01:00	Tampolo	Madagascar	0.2
	28 Mar 2024 00:00	Ambatomainty	Madagascar	0.2
	26 Mar 2024 02:00	Maintimbato	Madagascar	0.2
	29 Mar 2024 02:00	Ampanavoana	Madagascar	0.2
	29 Mar 2024 17:00	Mandrony	Madagascar	0.2
	27 Mar 2024 06:00	Lokia	Madagascar	0.2
	29 Mar 2024 01:00	Antalavia	Madagascar	0.2
	29 Mar 2024 20:00	Andrangazaha	Madagascar	0.2
	26 Mar 2024 02:00	Anoromby	Madagascar	0.2
	26 Mar 2024 02:00	Fananehana	Madagascar	0.2
	29 Mar 2024 02:00	Anjanozana	Madagascar	0.2
	26 Mar 2024 01:00	Mahavanona	Madagascar	0.2
	26 Mar 2024 01:00	Ampasina	Madagascar	0.2
	26 Mar 2024 02:00	Soanierana Ivongo	Madagascar	0.2
	27 Mar 2024 03:00	Ambatoharanana	Madagascar	0.2
	29 Mar 2024 02:00	Anaovandrano	Madagascar	0.2
	29 Mar 2024 17:00	Antananabe	Madagascar	0.2
	29 Mar 2024 17:00	Anjiamalandy	Madagascar	0.2
	29 Mar 2024 17:00	Ampiambesa	Madagascar	0.2
	29 Mar 2024 17:00	Antetezampolaka	Madagascar	0.2
	26 Mar 2024 01:00	Analanampotsy	Madagascar	0.2
	26 Mar 2024 02:00	Manakalana	Madagascar	0.2
	26 Mar 2024 02:00	Manambolosy	Madagascar	0.2
	29 Mar 2024 02:00	Rantranavona	Madagascar	0.2
	29 Mar 2024 03:00	Fampotabe	Madagascar	0.2
	29 Mar 2024 17:00	Ambariomena	Madagascar	0.2
	29 Mar 2024 17:00	Antsahabe	Madagascar	0.2
	29 Mar 2024 17:00	Ambodizaotra	Madagascar	0.2
	29 Mar 2024 02:00	Maniroka	Madagascar	0.2
	26 Mar 2024 01:00	Antakobola	Madagascar	0.2
	29 Mar 2024 15:00	Ambanisanjo	Madagascar	0.1
	29 Mar 2024 15:00	Ambatobe	Madagascar	0.1
	29 Mar 2024 00:00	Ampasimbe	Madagascar	0.1
	26 Mar 2024 02:00	Manompana	Madagascar	0.1
	26 Mar 2024 02:00	Fahambahy	Madagascar	0.1
	26 Mar 2024 02:00	Tampolo	Madagascar	0.1
	26 Mar 2024 02:00	Mananara	Madagascar	0.1
	29 Mar 2024 16:00	Anorotsangana	Madagascar	0.1
	28 Mar 2024 01:00	Antanamazava	Madagascar	0.1
	26 Mar 2024 02:00	Fandrarazana	Madagascar	0.1
	29 Mar 2024 01:00	Antanambe	Madagascar	0.1
	29 Mar 2024 01:00	Andilamboahangy	Madagascar	0.1
	29 Mar 2024 01:00	Ambatoharana	Madagascar	0.1
	29 Mar 2024 02:00	Vinanivao	Madagascar	0.1
	29 Mar 2024 01:00	Ratsianarana	Madagascar	0.1
	26 Mar 2024 01:00	Fenerive	Madagascar	0.1
	28 Mar 2024 00:00	Nosy Faly	Madagascar	0.1
	27 Mar 2024 23:00	Antanifatsy	Madagascar	0.1
	29 Mar 2024 02:00	Ambatofitarafana	Madagascar	0.1
	29 Mar 2024 00:00	Ivontaka	Madagascar	0.1
	28 Mar 2024 23:00	Ambalabe	Madagascar	0.1
	29 Mar 2024 01:00	Ambodivato	Madagascar	0.1
	28 Mar 2024 12:00	Antsikafoka	Madagascar	0.1
	29 Mar 2024 01:00	Manambato	Madagascar	0.1
	28 Mar 2024 13:00	Anjiabe	Madagascar	0.1
	28 Mar 2024 13:00	Maromokotra	Madagascar	0.1
	28 Mar 2024 13:00	Marokitrana	Madagascar	0.1
	28 Mar 2024 13:00	Bevoay	Madagascar	0.1
	27 Mar 2024 23:00	Ampanakana	Madagascar	0.1
	28 Mar 2024 00:00	Antsorokaka	Madagascar	0.1
	26 Mar 2024 02:00	Vatobe	Madagascar	0.1
	27 Mar 2024 03:00	Vohemar	Madagascar	0.1
	29 Mar 2024 00:00	Ambodimanga	Madagascar	0.1
	29 Mar 2024 01:00	Seranambe	Madagascar	0.1
	29 Mar 2024 04:00	Ambohitralanana	Madagascar	0.1
	29 Mar 2024 01:00	Antanetilava	Madagascar	0.1
	28 Mar 2024 13:00	Ampasibe	Madagascar	0.1
	28 Mar 2024 12:00	Mahambo	Madagascar	0.1
	28 Mar 2024 13:00	Madirotelo	Madagascar	0.1
	28 Mar 2024 01:00	Ambato	Madagascar	0.1
	28 Mar 2024 00:00	Ambaramidada	Madagascar	0.1
	28 Mar 2024 00:00	Fararano	Madagascar	0.1
	26 Mar 2024 02:00	Vohilava	Madagascar	0.1
	26 Mar 2024 02:00	Ambodifototra	Madagascar	0.1
	26 Mar 2024 02:00	Lonkintsy	Madagascar	0.1
	26 Mar 2024 02:00	Lokintsy	Madagascar	0.1
	29 Mar 2024 01:00	Lohatrozona	Madagascar	0.1
	27 Mar 2024 03:00	Antanambao	Madagascar	0.1
	29 Mar 2024 01:00	Tanambe	Madagascar	0.1
	27 Mar 2024 03:00	Andrafiamadinika	Madagascar	0.1
	26 Mar 2024 02:00	Ambodiatafa	Madagascar	0.1
	28 Mar 2024 15:00	Reharaka	Madagascar	0.1
	28 Mar 2024 15:00	Soahanina	Madagascar	0.1
	28 Mar 2024 12:00	Namahoaka	Madagascar	0.1
	28 Mar 2024 12:00	Mahatsara	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.