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

26 Mar 2024 12 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	310 thousand in Category 1 or higher
Maximum wind speed	157 km/h
Maximum storm surge	0.4 m (27 Mar 19:00 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	157 km/h	0.4 m	n.a.	1.5
Overall	157 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

157 km/h Current Max.

Up to 310000 people in Category 1 strength or higher (see SSHS)

Impact Timeline

Alert	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

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
2	27 Mar 2024 00:00	Category 1	139	<1000 people	650000 people	-13, 50.5
2	27 Mar 2024 12:00	Category 2	157	74000 people	1.1 million people	-13.5, 50.2	Madagascar
2	28 Mar 2024 00:00	Category 2	157	220000 people	1.3 million people	-14.1, 50.1	Madagascar
2	28 Mar 2024 12:00	Category 1	130	94000 people	950000 people	-14.8, 50.2	Madagascar
2	29 Mar 2024 12:00	Tropical storm	111	no people	no people	-16.1, 51.6
2	30 Mar 2024 12:00	Tropical storm	102	no people	2.2 million people	-17.9, 53.8
2	31 Mar 2024 12:00	Tropical storm	83	no people	no people	-20.1, 56.2

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	310000 people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Antsiranana	Madagascar	310000 people

Populated places

Name	Region Province	Country	City class	Population
Sambava	Antsiranana	Madagascar	City	31000 people
Antalaha	Antsiranana	Madagascar	City	34000 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)
Sambava	SVB	6	Civ.	Paved	No	5900
Antalaha Antsirabato	ANM	6	Civ.	Paved	No	3900

Ports

Name	LOCODE	Country
Sambava	MGSVB	Madagascar
Antataha	MGANM	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 Ambanjsondriry, Madagascar. This height is estimated for 27 Mar 2024 19:00 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 (88 locations). Calculation based on advisory number 2 of 26 Mar 2024 12:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	27 Mar 2024 19:00	Ambanjsondriry	Madagascar	0.4
	27 Mar 2024 22:00	Tanambao	Madagascar	0.4
	27 Mar 2024 23:00	Ampana Kanana	Madagascar	0.4
	28 Mar 2024 03:00	Sambava	Madagascar	0.4
	27 Mar 2024 17:00	Masondrono	Madagascar	0.4
	28 Mar 2024 02:00	Antongompatatra	Madagascar	0.4
	28 Mar 2024 07:00	Amborimalana	Madagascar	0.4
	28 Mar 2024 08:00	Ambodipont-Sahana	Madagascar	0.4
	28 Mar 2024 13:00	Ambinany	Madagascar	0.4
	28 Mar 2024 13:00	Antalaha	Madagascar	0.4
	28 Mar 2024 01:00	Bemanevika	Madagascar	0.4
	28 Mar 2024 09:00	Andrapengy	Madagascar	0.4
	28 Mar 2024 03:00	Antohamaro	Madagascar	0.4
	28 Mar 2024 06:00	Farahalana	Madagascar	0.4
	28 Mar 2024 11:00	Ampaha	Madagascar	0.4
	27 Mar 2024 16:00	Ambondrombe	Madagascar	0.3
	28 Mar 2024 16:00	Anjahamarina	Madagascar	0.3
	28 Mar 2024 19:00	Ambohitralanana	Madagascar	0.3
	26 Mar 2024 02:00	Manambia	Madagascar	0.3
	26 Mar 2024 02:00	Anantoraka	Madagascar	0.3
	28 Mar 2024 17:00	Ambalabe	Madagascar	0.3
	26 Mar 2024 02:00	Voloina	Madagascar	0.3
	26 Mar 2024 02:00	Maroantsetra	Madagascar	0.3
	26 Mar 2024 02:00	Andranofotsy	Madagascar	0.2
	28 Mar 2024 15:00	Antsirabato	Madagascar	0.2
	28 Mar 2024 19:00	Mahalevona	Madagascar	0.2
	28 Mar 2024 22:00	Ratsianarana	Madagascar	0.2
	28 Mar 2024 22:00	Ambodivato	Madagascar	0.2
	26 Mar 2024 02:00	Rantabe	Madagascar	0.2
	26 Mar 2024 02:00	Maintimbato	Madagascar	0.2
	26 Mar 2024 02:00	Ambanizana	Madagascar	0.2
	26 Mar 2024 02:00	Benjana	Madagascar	0.2
	26 Mar 2024 02:00	Anoromby	Madagascar	0.2
	26 Mar 2024 02:00	Fananehana	Madagascar	0.2
	27 Mar 2024 09:00	Ambatoharanana	Madagascar	0.2
	26 Mar 2024 02:00	Tampolo	Madagascar	0.2
	26 Mar 2024 01:00	Ampasina	Madagascar	0.2
	26 Mar 2024 02:00	Soanierana Ivongo	Madagascar	0.2
	26 Mar 2024 02:00	Manambolosy	Madagascar	0.2
	26 Mar 2024 02:00	Andrangazaha	Madagascar	0.2
	27 Mar 2024 12:00	Ampondra	Madagascar	0.2
	27 Mar 2024 13:00	Antsahotompy	Madagascar	0.2
	27 Mar 2024 12:00	Amboanio	Madagascar	0.2
	26 Mar 2024 02:00	Antalavia	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	Fahambahy	Madagascar	0.2
	26 Mar 2024 02:00	Ilomotro	Madagascar	0.2
	26 Mar 2024 02:00	Andohonko	Madagascar	0.2
	26 Mar 2024 01:00	Mahavanona	Madagascar	0.2
	26 Mar 2024 01:00	Antakobola	Madagascar	0.2
	26 Mar 2024 02:00	Ampasimbe	Madagascar	0.1
	26 Mar 2024 02:00	Manompana	Madagascar	0.1
	27 Mar 2024 10:00	Vohemar	Madagascar	0.1
	26 Mar 2024 02:00	Tampolo	Madagascar	0.1
	26 Mar 2024 02:00	Mananara	Madagascar	0.1
	28 Mar 2024 21:00	Antanjokatafana	Madagascar	0.1
	26 Mar 2024 02:00	Fandrarazana	Madagascar	0.1
	26 Mar 2024 02:00	Rantranavona	Madagascar	0.1
	28 Mar 2024 20:00	Anjanozana	Madagascar	0.1
	26 Mar 2024 01:00	Fenerive	Madagascar	0.1
	26 Mar 2024 02:00	Lohatrozona	Madagascar	0.1
	26 Mar 2024 03:00	Fampotabe	Madagascar	0.1
	26 Mar 2024 02:00	Andilamboahangy	Madagascar	0.1
	26 Mar 2024 03:00	Ambatoharana	Madagascar	0.1
	28 Mar 2024 20:00	Anaovandrano	Madagascar	0.1
	28 Mar 2024 23:00	Ampanavoana	Madagascar	0.1
	26 Mar 2024 02:00	Vatobe	Madagascar	0.1
	26 Mar 2024 02:00	Ivontaka	Madagascar	0.1
	26 Mar 2024 02:00	Seranambe	Madagascar	0.1
	26 Mar 2024 01:00	Antsikafoka	Madagascar	0.1
	26 Mar 2024 02:00	Antanetilava	Madagascar	0.1
	26 Mar 2024 02:00	Manambato	Madagascar	0.1
	26 Mar 2024 02:00	Antanambe	Madagascar	0.1
	28 Mar 2024 23:00	Maniroka	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
	27 Mar 2024 09:00	Antanambao	Madagascar	0.1
	26 Mar 2024 02:00	Tanambe	Madagascar	0.1
	27 Mar 2024 09:00	Andrafiamadinika	Madagascar	0.1
	26 Mar 2024 02:00	Ambodiatafa	Madagascar	0.1
	26 Mar 2024 02:00	Ambatofitarafana	Madagascar	0.1
	29 Mar 2024 03:00	Vinanivao	Madagascar	0.1
	26 Mar 2024 02:00	Ankazomalemy	Madagascar	0.1
	26 Mar 2024 02:00	Fadrina	Madagascar	0.1
	26 Mar 2024 02:00	Ambodimanga	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.