Overall Orange Tropical Cyclone alert for GAMANE-24 in Madagascar on 25 Mar 2024 18:00 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

25 Mar 2024 18 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	0.2 m (29 Mar 06:00 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	211 km/h	0.2 m	n.a.	0.5
Overall	169 km/h	0.2 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

211 km/h Current Max.

Up to 3400 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

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
1	26 Mar 2024 06:00	Tropical storm	84	no people	1.1 million people	Moderate Tropical Storm	74	-12.7, 50.9
1	26 Mar 2024 18:00	Category 1	127	no people	1.2 million people	Severe Tropical Storm	111	-13, 50.9
1	27 Mar 2024 06:00	Category 2	158	no people	1.2 million people	Tropical Cyclone	139	-13.5, 50.9
1	27 Mar 2024 18:00	Category 3	190	4500 people	1.2 million people	Intense Tropical Cyclone	167	-14, 50.8
1	28 Mar 2024 06:00	Category 4	211	<1000 people	1.2 million people	Intense Tropical Cyclone	185	-14.4, 50.8
1	28 Mar 2024 18:00	Category 3	201	no people	1.6 million people	Intense Tropical Cyclone	176	-14.8, 51.2
1	29 Mar 2024 06:00	Category 3	179	no people	1.6 million people	Tropical Cyclone	157	-15.3, 52.1
1	29 Mar 2024 18:00	Category 2	169	no people	29000 people	Tropical Cyclone	148	-16, 53.2
1	30 Mar 2024 06:00	Category 2	158	no people	2.2 million people	Tropical Cyclone	139	-17.4, 54.5
1	30 Mar 2024 18:00	Category 1	137	no people	no people	Tropical Cyclone	120	-19.4, 56.1

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	3400 people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Antsiranana	Madagascar	3400 people

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

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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

0.2 m

The maximum Storm surge height is 0.2m in Mahalevona, Madagascar. This height is estimated for 29 Mar 2024 06:00 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 (52 locations). Calculation based on advisory number 1 of 25 Mar 2024 18:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	29 Mar 2024 06:00	Mahalevona	Madagascar	0.2
	27 Mar 2024 19:00	Antohamaro	Madagascar	0.2
	29 Mar 2024 06:00	Maroantsetra	Madagascar	0.2
	29 Mar 2024 06:00	Andranofotsy	Madagascar	0.2
	29 Mar 2024 06:00	Anantoraka	Madagascar	0.2
	28 Mar 2024 18:00	Ambohitralanana	Madagascar	0.2
	29 Mar 2024 06:00	Manambia	Madagascar	0.2
	27 Mar 2024 17:00	Ampana Kanana	Madagascar	0.2
	29 Mar 2024 07:00	Ambanizana	Madagascar	0.2
	29 Mar 2024 07:00	Benjana	Madagascar	0.2
	27 Mar 2024 17:00	Tanambao	Madagascar	0.2
	28 Mar 2024 22:00	Ratsianarana	Madagascar	0.2
	28 Mar 2024 22:00	Ambodivato	Madagascar	0.2
	29 Mar 2024 06:00	Voloina	Madagascar	0.2
	27 Mar 2024 16:00	Antsahotompy	Madagascar	0.2
	27 Mar 2024 19:00	Farahalana	Madagascar	0.2
	26 Mar 2024 11:00	Andohonko	Madagascar	0.2
	26 Mar 2024 11:00	Ilomotro	Madagascar	0.1
	29 Mar 2024 07:00	Tampolo	Madagascar	0.1
	27 Mar 2024 17:00	Bemanevika	Madagascar	0.1
	26 Mar 2024 07:00	Ankazomalemy	Madagascar	0.1
	29 Mar 2024 07:00	Rantabe	Madagascar	0.1
	27 Mar 2024 10:00	Amboanio	Madagascar	0.1
	29 Mar 2024 07:00	Antalavia	Madagascar	0.1
	27 Mar 2024 15:00	Masondrono	Madagascar	0.1
	27 Mar 2024 15:00	Ambanjsondriry	Madagascar	0.1
	27 Mar 2024 17:00	Antongompatatra	Madagascar	0.1
	27 Mar 2024 19:00	Amborimalana	Madagascar	0.1
	27 Mar 2024 19:00	Anjahamarina	Madagascar	0.1
	29 Mar 2024 12:00	Ambodifototra	Madagascar	0.1
	29 Mar 2024 07:00	Maintimbato	Madagascar	0.1
	29 Mar 2024 07:00	Anoromby	Madagascar	0.1
	27 Mar 2024 17:00	Ambondrombe	Madagascar	0.1
	29 Mar 2024 07:00	Fampotabe	Madagascar	0.1
	27 Mar 2024 17:00	Sambava	Madagascar	0.1
	27 Mar 2024 19:00	Ampaha	Madagascar	0.1
	29 Mar 2024 07:00	Fananehana	Madagascar	0.1
	27 Mar 2024 15:00	Antanambao	Madagascar	0.1
	27 Mar 2024 15:00	Ampondra	Madagascar	0.1
	27 Mar 2024 15:00	Vohemar	Madagascar	0.1
	29 Mar 2024 07:00	Manambolosy	Madagascar	0.1
	29 Mar 2024 07:00	Rantranavona	Madagascar	0.1
	29 Mar 2024 08:00	Ambatoharana	Madagascar	0.1
	29 Mar 2024 07:00	Vinanivao	Madagascar	0.1
	29 Mar 2024 06:00	Anaovandrano	Madagascar	0.1
	29 Mar 2024 01:00	Anjanozana	Madagascar	0.1
	27 Mar 2024 19:00	Ambodipont-Sahana	Madagascar	0.1
	27 Mar 2024 19:00	Andrapengy	Madagascar	0.1
	27 Mar 2024 15:00	Fadrina	Madagascar	0.1
	26 Mar 2024 12:00	Ambanisanjo	Madagascar	0.1
	26 Mar 2024 12:00	Ambatobe	Madagascar	0.1
	29 Mar 2024 09:00	Andrangazaha	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.