Overall Orange Tropical Cyclone alert for HIDAYA-24 in Tanzania, Seychelles, Comoros from 01 May 2024 00:00 UTC to 12:00

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 HIDAYA-24

in Tanzania, Seychelles, Comoros

01 May 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 HIDAYA-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	Tanzania, Seychelles, Comoros
Exposed population	640 thousand in Category 1 or higher
Maximum wind speed	148 km/h
Maximum storm surge	0.3 m (04 May 22:00 UTC)
Vulnerability	High (Comoros)
Landfall	between 04 May 2024 12:00 - 05 May 2024 00:00 in Tanzania

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	106 km/h	0.3 m	n.a.	0.5
Overall	148 km/h	0.3 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

106 km/h Current Max.

Up to 10.5 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	01 May 2024 00:00	95	10.2 million	No people	Seychelles, Comoros, Mozambique, Tanzania
2	01 May 2024 06:00	106	8.9 million	No people	Seychelles, Comoros, Mozambique, Tanzania
3	01 May 2024 12:00	106	10.5 million	No people	Seychelles, Mozambique, Tanzania

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)	Countries
1	01 May 2024 00:00	Tropical storm	63	no people	<1000 people	Tropical Depression	56	-8.4, 45.5
2	01 May 2024 06:00	Tropical storm	63	no people	<1000 people	Tropical Depression	56	-8.7, 45.6
3	01 May 2024 12:00	Tropical storm	63	no people	<1000 people	Tropical Depression	56	-8.8, 45.4
3	02 May 2024 00:00	Tropical storm	84	no people	<1000 people	Moderate Tropical Storm	74	-8.9, 44.7
3	02 May 2024 12:00	Tropical storm	106	no people	no people	Severe Tropical Storm	93	-9, 44
3	03 May 2024 00:00	Tropical storm	95	no people	no people	Moderate Tropical Storm	83	-9.2, 43.1
3	03 May 2024 12:00	Tropical storm	84	no people	530000 people	Moderate Tropical Storm	74	-9.1, 42.1
3	04 May 2024 00:00	Tropical storm	74	no people	6 million people	Moderate Tropical Storm	65	-8.7, 41.2
3	04 May 2024 12:00	Tropical storm	63	no people	10.2 million people	Tropical Depression	56	-8.2, 40.3
3	05 May 2024 00:00	Tropical depression	53	no people	no people	Overland Depression	46	-6.9, 39.4	Tanzania
3	05 May 2024 12:00	Tropical depression	42	no people	no people	Overland Depression	37	-5, 39.1	Tanzania

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
Seychelles	<1000 people
Mozambique	6000 people
Tanzania	10.3 million people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Seychelles	Seychelles	<1000 people
Cabo Delgado	Mozambique	6000 people
Mtwara	Tanzania	190000 people
Lindi	Tanzania	300000 people
Pwani	Tanzania	2.1 million people
Dar es Salaam	Tanzania	6.3 million people
Zanzibar Central/South	Tanzania	150000 people
Zanzibar Urban/West	Tanzania	860000 people
Zanzibar North	Tanzania	230000 people
Morogoro	Tanzania	72000 people
Tanga	Tanzania	39000 people

Populated places

Name	Region Province	Country	City class	Population
Mtwara	Mtwara	Tanzania	Major city	95000 people
Dar es Salaam	Dar-es-Salaam	Tanzania	Major city	2.7 million people
Zanzibar	Mjini-Magharibi (Zanzibar Urban/West)	Tanzania	Major city	400000 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)
Assumption Island		3	Civ.	Paved	No	3900
Mtwara	MYW	113	Civ.	Paved	Yes	7400
Lindi Kikwetu	LDI	30	Civ.	Paved	No	5200
Mafia	MFA	18	Civ.	Unpaved	No	5200
Dar Es Salaam	DAR	55	Civ.	Paved	Yes	9800
Zanzibar	ZNZ	16	Civ.	Paved	Yes	8000
Ngerengere		226				0

Ports

Name	LOCODE	Country
Assumption Island		Seychelles
Mtwara	TZMYW	Tanzania
Mikindani		Tanzania
Kilondoni		Tanzania
Lindi	TZLDI	Tanzania
Kilwa Masoko	TZKIM	Tanzania
Kilwa Kivinje	TZKIK	Tanzania
Kisiju		Tanzania
Mjimwema Terminal		Tanzania
Dar-es-Salaam	TZDAR	Tanzania
Zanzibar	TZZNZ	Tanzania

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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

0.3 m

The maximum Storm surge height is 0.3m in Dondo, Tanzania. This height is estimated for 04 May 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 (92 locations). Calculation based on advisory number 3 of 01 May 2024 12:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	04 May 2024 22:00	Dondo	Tanzania	0.3
	04 May 2024 22:00	Mpafu	Tanzania	0.3
	04 May 2024 22:00	Buuni Village	Tanzania	0.3
	04 May 2024 22:00	Kisiju	Tanzania	0.3
	04 May 2024 00:00	Meronvi	Mozambique	0.2
	04 May 2024 00:00	Quissengue	Mozambique	0.2
	05 May 2024 04:00	Mchamba Wima	Tanzania	0.2
	05 May 2024 04:00	Kibele	Tanzania	0.2
	04 May 2024 14:00	Mwera	Tanzania	0.2
	04 May 2024 16:00	Jimbo	Tanzania	0.2
	04 May 2024 02:00	Libambai	Mozambique	0.2
	04 May 2024 22:00	Magawa	Tanzania	0.2
	04 May 2024 17:00	Mchungu	Tanzania	0.2
	04 May 2024 17:00	Nyambati	Tanzania	0.2
	04 May 2024 17:00	Kiombani	Tanzania	0.2
	05 May 2024 04:00	Fumba	Tanzania	0.2
	04 May 2024 02:00	Vila de Mocimboa da Praia	Mozambique	0.2
	04 May 2024 21:00	Msindaji	Tanzania	0.2
	03 May 2024 14:00	Uchangani	Tanzania	0.2
	03 May 2024 14:00	Ziwani	Tanzania	0.2
	03 May 2024 14:00	Kijichame	Tanzania	0.2
	04 May 2024 17:00	Mbwera	Tanzania	0.2
	04 May 2024 17:00	Kiechuru	Tanzania	0.2
	05 May 2024 10:00	Pangani	Tanzania	0.2
	05 May 2024 10:00	Vumbi	Tanzania	0.2
	03 May 2024 14:00	Taandani	Tanzania	0.2
	05 May 2024 04:00	Kiembi Samaki	Tanzania	0.2
	04 May 2024 02:00	Bawala	Mozambique	0.2
	04 May 2024 02:00	Olumbe	Mozambique	0.2
	03 May 2024 23:00	Maganja	Mozambique	0.2
	04 May 2024 19:00	Jaja	Tanzania	0.2
	05 May 2024 03:00	Uzi	Tanzania	0.2
	04 May 2024 14:00	Chole	Tanzania	0.2
	05 May 2024 03:00	Kijini	Tanzania	0.2
	04 May 2024 16:00	Kipingwe	Tanzania	0.2
	05 May 2024 04:00	Zanzibar	Tanzania	0.2
	03 May 2024 13:00	Pangane	Mozambique	0.2
	04 May 2024 15:00	Mkarangama	Tanzania	0.1
	05 May 2024 05:00	Bet-el-Mali	Tanzania	0.1
	05 May 2024 09:00	Ushongo Mabaoni	Tanzania	0.1
	05 May 2024 00:00	Mboamaji	Tanzania	0.1
	05 May 2024 05:00	Bumbwini	Tanzania	0.1
	04 May 2024 21:00	Somanga	Tanzania	0.1
	04 May 2024 19:00	Pombwe	Tanzania	0.1
	05 May 2024 00:00	Bandarini	Tanzania	0.1
	05 May 2024 06:00	Mkokotoni	Tanzania	0.1
	05 May 2024 03:00	Mapopwe	Tanzania	0.1
	04 May 2024 16:00	Kilindoni	Tanzania	0.1
	03 May 2024 23:00	Quiwia	Mozambique	0.1
	04 May 2024 23:00	Kutani	Tanzania	0.1
	05 May 2024 00:00	Mjimwema	Tanzania	0.1
	05 May 2024 03:00	Kipandoni	Tanzania	0.1
	05 May 2024 03:00	Hiari	Tanzania	0.1
	05 May 2024 03:00	Tongoni	Tanzania	0.1
	05 May 2024 03:00	Kitogani	Tanzania	0.1
	05 May 2024 03:00	Paje	Tanzania	0.1
	05 May 2024 05:00	Chwaka	Tanzania	0.1
	05 May 2024 07:00	Banda Kuu	Tanzania	0.1
	03 May 2024 16:00	Chekea	Tanzania	0.1
	03 May 2024 16:00	Chumbuni	Tanzania	0.1
	03 May 2024 16:00	Bopwe	Tanzania	0.1
	05 May 2024 06:00	Bwereu	Tanzania	0.1
	04 May 2024 02:00	Palma	Mozambique	0.1
	04 May 2024 02:00	Boala	Mozambique	0.1
	05 May 2024 02:00	Magogoni	Tanzania	0.1
	05 May 2024 01:00	Msasani	Tanzania	0.1
	05 May 2024 04:00	Ukongoroni	Tanzania	0.1
	05 May 2024 04:00	Pingwe	Tanzania	0.1
	05 May 2024 05:00	Dikoni	Tanzania	0.1
	05 May 2024 06:00	Mkuuni	Tanzania	0.1
	05 May 2024 06:00	Gazija	Tanzania	0.1
	05 May 2024 06:00	Gulioni	Tanzania	0.1
	04 May 2024 04:00	Quiterajo	Mozambique	0.1
	03 May 2024 23:00	Quionga	Mozambique	0.1
	03 May 2024 20:00	Msimbati	Tanzania	0.1
	05 May 2024 05:00	Sadani	Tanzania	0.1
	05 May 2024 05:00	Mkadini	Tanzania	0.1
	05 May 2024 03:00	Mbweni	Tanzania	0.1
	05 May 2024 05:00	Donge	Tanzania	0.1
	04 May 2024 16:00	Kirongwe	Tanzania	0.1
	03 May 2024 14:00	Marere	Mozambique	0.1
	03 May 2024 14:00	Lucete	Mozambique	0.1
	05 May 2024 02:00	Mkunguni	Tanzania	0.1
	05 May 2024 01:00	Kawi	Tanzania	0.1
	05 May 2024 03:00	Konduchi	Tanzania	0.1
	05 May 2024 01:00	Kipara	Tanzania	0.1
	05 May 2024 01:00	Dar es Salaam	Tanzania	0.1
	05 May 2024 01:00	Doriya	Tanzania	0.1
	05 May 2024 05:00	Mdudu Mdogo	Tanzania	0.1
	05 May 2024 09:00	Mkwaja	Tanzania	0.1
	03 May 2024 13:00	Anjiabe	Madagascar	0.1
	03 May 2024 12:00	Ambato	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.