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 (27 Mar 22:00 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	179 km/h	0.4 m	n.a.	2.5
Overall	169 km/h	0.4 m	n.a.	2.5
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

179 km/h Current Max.

Up to 440000 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	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

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 18:00	Tropical storm	63	no people	200000 people	Tropical Depression	56	-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
2	26 Mar 2024 12:00	Tropical storm	84	no people	1.8 million people	Moderate Tropical Storm	74	-13, 50.7
2	27 Mar 2024 00:00	Category 1	127	270000 people	1.8 million people	Severe Tropical Storm	111	-13.5, 50.6
2	27 Mar 2024 12:00	Category 2	158	390000 people	1.7 million people	Tropical Cyclone	139	-13.8, 50.6
2	28 Mar 2024 00:00	Category 3	179	230000 people	1.5 million people	Tropical Cyclone	157	-14.4, 50.6
2	28 Mar 2024 12:00	Category 3	190	12000 people	1.2 million people	Intense Tropical Cyclone	167	-15, 51
2	29 Mar 2024 00:00	Category 3	190	no people	310000 people	Intense Tropical Cyclone	167	-15.5, 51.7
2	29 Mar 2024 12:00	Category 2	169	no people	no people	Tropical Cyclone	148	-16, 52.9
2	30 Mar 2024 00:00	Category 1	148	no people	no people	Tropical Cyclone	130	-16.8, 54.3
2	30 Mar 2024 12:00	Category 1	127	no people	no people	Severe Tropical Storm	111	-17.7, 55.4
2	31 Mar 2024 00:00	Tropical storm	116	no people	no people	Severe Tropical Storm	102	-18.9, 56.4

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	420000 people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Antsiranana	Madagascar	420000 people

Populated places

Name	Region Province	Country	City class	Population
Vohemar	Antsiranana	Madagascar	City	-
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)
Vohemar	VOH	6	Civ.	Paved	No	4200
Sambava	SVB	6	Civ.	Paved	No	5900
Antalaha Antsirabato	ANM	6	Civ.	Paved	No	3900

Ports

Name	LOCODE	Country
Vohemar		Madagascar
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 Antohamaro, Madagascar. This height is estimated for 27 Mar 2024 22:00 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 2 of 26 Mar 2024 00:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	27 Mar 2024 22:00	Antohamaro	Madagascar	0.4
	28 Mar 2024 12:00	Mahalevona	Madagascar	0.4
	28 Mar 2024 11:00	Anantoraka	Madagascar	0.3
	28 Mar 2024 13:00	Maroantsetra	Madagascar	0.3
	28 Mar 2024 13:00	Andranofotsy	Madagascar	0.3
	28 Mar 2024 12:00	Ambohitralanana	Madagascar	0.3
	28 Mar 2024 11:00	Manambia	Madagascar	0.3
	27 Mar 2024 22:00	Farahalana	Madagascar	0.3
	27 Mar 2024 15:00	Ampana Kanana	Madagascar	0.3
	28 Mar 2024 11:00	Voloina	Madagascar	0.3
	28 Mar 2024 14:00	Ratsianarana	Madagascar	0.3
	28 Mar 2024 14:00	Ambodivato	Madagascar	0.3
	28 Mar 2024 16:00	Ambanizana	Madagascar	0.2
	28 Mar 2024 16:00	Benjana	Madagascar	0.2
	27 Mar 2024 17:00	Antongompatatra	Madagascar	0.2
	27 Mar 2024 17:00	Bemanevika	Madagascar	0.2
	28 Mar 2024 00:00	Amborimalana	Madagascar	0.2
	28 Mar 2024 04:00	Anjahamarina	Madagascar	0.2
	28 Mar 2024 12:00	Rantabe	Madagascar	0.2
	28 Mar 2024 00:00	Ampaha	Madagascar	0.2
	28 Mar 2024 16:00	Tampolo	Madagascar	0.2
	28 Mar 2024 18:00	Antalavia	Madagascar	0.2
	27 Mar 2024 10:00	Ambanjsondriry	Madagascar	0.2
	27 Mar 2024 10:00	Masondrono	Madagascar	0.2
	28 Mar 2024 00:00	Ambodipont-Sahana	Madagascar	0.2
	28 Mar 2024 09:00	Ambalabe	Madagascar	0.2
	28 Mar 2024 22:00	Fampotabe	Madagascar	0.2
	27 Mar 2024 18:00	Sambava	Madagascar	0.2
	28 Mar 2024 00:00	Andrapengy	Madagascar	0.2
	28 Mar 2024 00:00	Ambinany	Madagascar	0.2
	28 Mar 2024 13:00	Antanjokatafana	Madagascar	0.2
	26 Mar 2024 14:00	Ilomotro	Madagascar	0.2
	26 Mar 2024 14:00	Andohonko	Madagascar	0.2
	28 Mar 2024 12:00	Maintimbato	Madagascar	0.2
	28 Mar 2024 15:00	Anjanozana	Madagascar	0.2
	28 Mar 2024 17:00	Ampanavoana	Madagascar	0.2
	28 Mar 2024 16:00	Anoromby	Madagascar	0.2
	28 Mar 2024 19:00	Anaovandrano	Madagascar	0.2
	26 Mar 2024 13:00	Ankazomalemy	Madagascar	0.2
	28 Mar 2024 16:00	Fananehana	Madagascar	0.2
	27 Mar 2024 08:00	Ambondrombe	Madagascar	0.2
	28 Mar 2024 22:00	Rantranavona	Madagascar	0.2
	27 Mar 2024 13:00	Tanambao	Madagascar	0.2
	28 Mar 2024 17:00	Maniroka	Madagascar	0.2
	28 Mar 2024 16:00	Manambolosy	Madagascar	0.1
	28 Mar 2024 21:00	Ambatoharana	Madagascar	0.1
	28 Mar 2024 06:00	Antsirabato	Madagascar	0.1
	27 Mar 2024 05:00	Ampondra	Madagascar	0.1
	27 Mar 2024 05:00	Amboanio	Madagascar	0.1
	28 Mar 2024 16:00	Fahambahy	Madagascar	0.1
	28 Mar 2024 19:00	Vinanivao	Madagascar	0.1
	28 Mar 2024 04:00	Antalaha	Madagascar	0.1
	27 Mar 2024 09:00	Fadrina	Madagascar	0.1
	26 Mar 2024 13:00	Soanierana Ivongo	Madagascar	0.1
	27 Mar 2024 03:00	Vohemar	Madagascar	0.1
	27 Mar 2024 02:00	Ambatoharanana	Madagascar	0.1
	27 Mar 2024 06:00	Antsahotompy	Madagascar	0.1
	28 Mar 2024 20:00	Andilamboahangy	Madagascar	0.1
	26 Mar 2024 13:00	Mahavanona	Madagascar	0.1
	26 Mar 2024 13:00	Ampasina	Madagascar	0.1
	26 Mar 2024 13:00	Antakobola	Madagascar	0.1
	26 Mar 2024 13:00	Analanampotsy	Madagascar	0.1
	26 Mar 2024 13:00	Ampasimbe	Madagascar	0.1
	26 Mar 2024 13:00	Manakalana	Madagascar	0.1
	26 Mar 2024 13:00	Andrangazaha	Madagascar	0.1
	28 Mar 2024 16:00	Tampolo	Madagascar	0.1
	28 Mar 2024 18:00	Mananara	Madagascar	0.1
	28 Mar 2024 20:00	Ivontaka	Madagascar	0.1
	26 Mar 2024 13:00	Fandrarazana	Madagascar	0.1
	29 Mar 2024 00:00	Antanambe	Madagascar	0.1
	26 Mar 2024 15:00	Ambanisanjo	Madagascar	0.1
	26 Mar 2024 15:00	Ambatobe	Madagascar	0.1
	26 Mar 2024 13:00	Manompana	Madagascar	0.1
	27 Mar 2024 04:00	Antanambao	Madagascar	0.1
	27 Mar 2024 04:00	Andrafiamadinika	Madagascar	0.1
	28 Mar 2024 20:00	Ambatofitarafana	Madagascar	0.1
	28 Mar 2024 22:00	Ambodimanga	Madagascar	0.1
	29 Mar 2024 00:00	Seranambe	Madagascar	0.1
	29 Mar 2024 00:00	Manambato	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.