Overall Green Tropical Cyclone alert for JOBO-21 in Tanzania, Seychelles from 21 Apr 2021 00:00 UTC to 24 Apr 2021 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 Green alert Tropical Cyclone for JOBO-21

in Tanzania, Seychelles

21 Apr 2021 06 UTC

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to select bulletin time

Meteorological source:

GDACS JTWC

Impact Single TC

GFS
HWRF
ECMWF

Impact based on all weather systems in the area

Impact

Tropical Cyclone JOBO-21 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	HWRF
Exposed countries	Seychelles
Exposed population	No people in Category 1 or higher
Maximum wind speed	104 km/h
Maximum storm surge	0.2 m (21 Apr 10:45 UTC)
Vulnerability	Medium (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
HWRF Current	104 km/h	0.2 m	229 mm	0.5
HWRF Overall	137 km/h	0.2 m	699 mm	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

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Wind

137 km/h

Up to Few people can be affected by wind speeds of Tropical Storm strength or above

Wind exposed population - AoIs

Estimations based on the bulletin of 21 Apr 2021 06:00 UTC

Category	Country	Population
Tropical Storm	Seychelles	495

See TC classification SSHS

Wind Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

Alert	N°	Date (UTC)	Max Winds (km/h)	Pop in Cat. 1 or higher	TS	Cat. 1	Cat. 2	Cat. 3	Cat. 4	Cat. 5	Countries
	1	21 Apr 2021 00:00	90	-		-	-	-	-	-	Seychelles
	2	21 Apr 2021 06:00	140	-		-	-	-	-	-	Seychelles

Download:

Impact estimation for the next 72h

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Rainfall

Rain exposed population - AoIs

Estimations based on the bulletin of 21 Apr 2021 06:00 UTC

Level	Country	Population
250-500 mm	Seychelles	263
100-250 mm	Seychelles, Comoros	64,277	+
	Seychelles	222
	Comoros	64,055
50-100 mm	Seychelles, Mozambique, Comoros	226,190	+
	Seychelles	10
	Mozambique	2,678
	Comoros	223,502

Rain Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

Alert	N°	Date (UTC)	Max Rainfall (mm)	Pop >100mm or higher	50-100	100-250	250-500	500-750	750-1000	>1000	Countries
	1	21 Apr 2021 00:00	202	-		-	-	-	-	-	Seychelles
	2	21 Apr 2021 06:00	1405	60 thousand				-	-	-	Seychelles, Mozambique, Comoros

Impact estimation for the next 72h

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StormSurge

0.2 m

The maximum Storm surge height is 0.2m in Mkadini, Tanzania. This height is estimated for 21 Apr 2021 10:45 UTC .

The JRC has developed an experimental global storm surge model, which is run after each advisory issued by the regional tropical cyclone centres. 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.

Storm Surge Exposed population - AoIs

Storm Surge Exposed locations

Calculation based on the bulletin of 21 Apr 2021 06:00 UTC

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	21 Apr 2021 10:45	Mkadini	Tanzania	0.2
	21 Apr 2021 13:15	Somanga	Tanzania	0.2
	21 Apr 2021 13:15	Pombwe	Tanzania	0.2
	21 Apr 2021 13:15	Jaja	Tanzania	0.2
	21 Apr 2021 19:00	Magawa	Tanzania	0.1
	21 Apr 2021 19:00	Msindaji	Tanzania	0.1
	21 Apr 2021 19:00	Mchungu	Tanzania	0.1
	21 Apr 2021 10:30	Mbweni	Tanzania	0.1
	21 Apr 2021 10:30	Doriya	Tanzania	0.1
	21 Apr 2021 13:15	Matapatapa	Tanzania	0.1
	21 Apr 2021 19:45	Marovoha	Madagascar	0.1
	21 Apr 2021 19:45	Ampitily	Madagascar	0.1
	21 Apr 2021 19:45	Ambalatsingy	Madagascar	0.1
	21 Apr 2021 19:45	Singalana	Madagascar	0.1
	21 Apr 2021 19:45	Antaribao	Madagascar	0.1
	21 Apr 2021 19:45	Ambodibonara	Madagascar	0.1
	21 Apr 2021 19:45	Tsaratanana	Madagascar	0.1
	21 Apr 2021 19:45	Ampasindava	Madagascar	0.1
	21 Apr 2021 19:45	Ankinganifahatelo	Madagascar	0.1
	21 Apr 2021 18:45	Kisiju	Tanzania	0.1
	21 Apr 2021 10:30	Kigongoni	Tanzania	0.1
	21 Apr 2021 10:30	Bagamoyo	Tanzania	0.1
	21 Apr 2021 14:30	Kiombani	Tanzania	0.1
	21 Apr 2021 19:00	Dondo	Tanzania	0.1
	21 Apr 2021 09:00	Gulioni	Tanzania	0.1
	21 Apr 2021 09:00	Mapopwe	Tanzania	0.1
	21 Apr 2021 09:00	Mdudu Mdogo	Tanzania	0.1
	21 Apr 2021 09:00	Dikoni	Tanzania	0.1
	21 Apr 2021 09:00	Chwaka	Tanzania	0.1
	21 Apr 2021 09:00	Kitogani	Tanzania	0.1
	21 Apr 2021 09:00	Ukongoroni	Tanzania	0.1
	21 Apr 2021 09:00	Pingwe	Tanzania	0.1
	21 Apr 2021 09:00	Paje	Tanzania	0.1
	21 Apr 2021 07:15	Bejongoro	Madagascar	0.1
	21 Apr 2021 07:15	Ampandrano	Madagascar	0.1
	21 Apr 2021 07:15	Andrafialava	Madagascar	0.1
	21 Apr 2021 07:15	Mandrony	Madagascar	0.1
	21 Apr 2021 07:15	Maromanjo	Madagascar	0.1
	21 Apr 2021 07:15	Anompaka	Madagascar	0.1
	21 Apr 2021 07:15	Madirotelo	Madagascar	0.1
	21 Apr 2021 07:15	Mahitsihazo	Madagascar	0.1
	21 Apr 2021 07:15	Andamoty	Madagascar	0.1
	21 Apr 2021 07:15	Marokitrana	Madagascar	0.1
	21 Apr 2021 07:15	Bevoay	Madagascar	0.1
	21 Apr 2021 07:15	Maromandia	Madagascar	0.1
	21 Apr 2021 18:45	Nyambati	Tanzania	0.1
	21 Apr 2021 18:45	Salale	Tanzania	0.1
	21 Apr 2021 13:15	Mbwera	Tanzania	0.1
	21 Apr 2021 12:15	Kipara	Tanzania	0.1
	21 Apr 2021 12:15	Dar es Salaam	Tanzania	0.1
	21 Apr 2021 12:15	Msasani	Tanzania	0.1
	21 Apr 2021 12:15	Magogoni	Tanzania	0.1
	21 Apr 2021 12:15	Mjimwema	Tanzania	0.1
	21 Apr 2021 12:15	Mboamaji	Tanzania	0.1
	21 Apr 2021 12:15	Bandarini	Tanzania	0.1
	21 Apr 2021 12:15	Kutani	Tanzania	0.1
	22 Apr 2021 11:00	Ambalihabe	Madagascar	0.1
	22 Apr 2021 11:00	Ambodizaotra	Madagascar	0.1
	22 Apr 2021 11:00	Antotoro	Madagascar	0.1
	22 Apr 2021 11:00	Ampohana	Madagascar	0.1
	21 Apr 2021 18:30	Marovato	Madagascar	0.1
	21 Apr 2021 18:30	Ampasibe	Madagascar	0.1
	21 Apr 2021 18:30	Analalava	Madagascar	0.1
	21 Apr 2021 18:30	Ananalava	Madagascar	0.1
	21 Apr 2021 06:15	Antetikireja	Madagascar	0.1
	21 Apr 2021 12:00	Donge	Tanzania	0.1
	21 Apr 2021 12:00	Mkokotoni	Tanzania	0.1
	21 Apr 2021 12:00	Bwereu	Tanzania	0.1
	21 Apr 2021 12:00	Banda Kuu	Tanzania	0.1
	21 Apr 2021 12:00	Mkuuni	Tanzania	0.1
	21 Apr 2021 12:00	Gazija	Tanzania	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.