Overall Green alert Tropical Cyclone for JOBO-21
in Tanzania, Seychelles

Impact

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

Meteorological source GDACS
Exposed countries Tanzania, Seychelles
Exposed population No people in Category 1 or higher
Maximum wind speed 111 km/h
Maximum storm surge 0.4 m (24 Apr 17:00 UTC)
Vulnerability Medium (Tanzania)
Landfall between
24 Apr 2021 06:00 - 24 Apr 2021 18:00

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
GDACS Current 46 km/h 0.3 m n.a. 0.5
GDACS Overall 111 km/h 0.4 m n.a. 0.5

Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

Wind

46 km/h Current Max.

Up to 310000 people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm or higher
Population in
Cat 1. or higher
Countries
Green 1 21 Apr 2021 00:00 130 580 thousand No people Seychelles, Tanzania
Green 2 21 Apr 2021 12:00 139 1.6 million Few people Seychelles
Green 3 22 Apr 2021 00:00 93 1.2 million No people Seychelles, Tanzania
Green 4 22 Apr 2021 12:00 83 750 thousand No people Seychelles, Tanzania
Green 5 23 Apr 2021 00:00 83 6.4 million No people Seychelles, Tanzania
Green 6 23 Apr 2021 12:00 74 80 thousand No people Seychelles, Tanzania
Green 7 23 Apr 2021 18:00 65 5.2 million No people Tanzania, Seychelles
Green 8 24 Apr 2021 06:00 65 5.1 million No people Tanzania, Seychelles
Green 9 24 Apr 2021 18:00 46 320 thousand No people Tanzania, Seychelles

Bulletin Timeline

Alert Date (UTC) Category Max winds
(km/h)
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
GREEN
1 21 Apr 2021 00:00 Tropical storm 83 <1000 people no people -10, 48.8
GREEN
2 21 Apr 2021 12:00 Tropical storm 111 <1000 people no people -9.7, 47.8
GREEN
3 22 Apr 2021 00:00 Tropical storm 93 <1000 people no people -10.4, 46.5
GREEN
4 22 Apr 2021 12:00 Tropical storm 83 no people no people -9.9, 45.1
GREEN
5 23 Apr 2021 00:00 Tropical storm 83 no people no people -9.2, 43.9
GREEN
6 23 Apr 2021 12:00 Tropical storm 74 no people no people -8.5, 43.4
GREEN
7 23 Apr 2021 18:00 Tropical storm 65 <1000 people no people -8.1, 42.3
GREEN
8 24 Apr 2021 06:00 Tropical storm 65 5.1 million people no people -7.9, 40.7
GREEN
9 24 Apr 2021 18:00 Tropical depression 46 no people no people -8, 39 Tanzania
GREEN
9 25 Apr 2021 06:00 Tropical depression 37 no people no people -8, 38.2 Tanzania
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.
Download:



Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places

Countries

Country
Tanzania
Seychelles

Provinces

Region Province Country Population
Pwani Tanzania 630000 people
Lindi Tanzania 790000 people
Seychelles Seychelles 73000 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)
Mafia MFA 18 Civ. Unpaved No 5200
Assumption Island 3 Civ. Paved No 3900

Ports

Name LOCODE Country
Kilondoni Tanzania
Assumption Island Seychelles
Cosmoledo Island Seychelles
Astove Island Seychelles

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.

...

StormSurge

0.4 m

The maximum Storm surge height is  0.4m in Kisiju, Tanzania. This height is estimated for 24 Apr 2021 17:00 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 (53 locations). Calculation based on advisory number 8 of 24 Apr 2021 06:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
24 Apr 2021 17:00 Kisiju Tanzania  0.4
24 Apr 2021 17:00 Magawa Tanzania  0.3
24 Apr 2021 17:00 Msindaji Tanzania  0.3
24 Apr 2021 17:00 Dondo Tanzania  0.3
24 Apr 2021 17:00 Mpafu Tanzania  0.3
24 Apr 2021 18:00 Mchungu Tanzania  0.3
24 Apr 2021 18:00 Nyambati Tanzania  0.3
24 Apr 2021 18:00 Kiombani Tanzania  0.3
24 Apr 2021 07:00 Meronvi Mozambique  0.3
24 Apr 2021 07:00 Quissengue Mozambique  0.2
24 Apr 2021 07:00 Libambai Mozambique  0.2
24 Apr 2021 07:00 Vila de Mocimboa da Praia Mozambique  0.2
24 Apr 2021 15:00 Kiechuru Tanzania  0.2
24 Apr 2021 16:00 Buuni Village Tanzania  0.2
24 Apr 2021 19:00 Somanga Tanzania  0.2
24 Apr 2021 12:00 Jimbo Tanzania  0.2
24 Apr 2021 16:00 Jaja Tanzania  0.2
24 Apr 2021 15:00 Mbwera Tanzania  0.2
24 Apr 2021 09:00 Mwera Tanzania  0.2
24 Apr 2021 07:00 Bawala Mozambique  0.2
24 Apr 2021 07:00 Olumbe Mozambique  0.2
24 Apr 2021 16:00 Pombwe Tanzania  0.2
24 Apr 2021 07:00 Maganja Mozambique  0.2
24 Apr 2021 06:00 Pangane Mozambique  0.2
24 Apr 2021 12:00 Kipingwe Tanzania  0.1
22 Apr 2021 14:00 Andrafia Madagascar  0.1
24 Apr 2021 20:00 Matapatapa Tanzania  0.1
23 Apr 2021 13:00 Fumba Tanzania  0.1
24 Apr 2021 07:00 Quiterajo Mozambique  0.1
24 Apr 2021 18:00 Kilindoni Tanzania  0.1
24 Apr 2021 16:00 Kutani Tanzania  0.1
22 Apr 2021 14:00 Anjiabe Madagascar  0.1
23 Apr 2021 13:00 Kibele Tanzania  0.1
22 Apr 2021 15:00 Ampasimena Madagascar  0.1
24 Apr 2021 11:00 Mkarangama Tanzania  0.1
22 Apr 2021 12:00 Nosy Faly Madagascar  0.1
22 Apr 2021 13:00 Ambato Madagascar  0.1
24 Apr 2021 09:00 Chole Tanzania  0.1
23 Apr 2021 12:00 Uzi Tanzania  0.1
23 Apr 2021 13:00 Mchamba Wima Tanzania  0.1
23 Apr 2021 00:00 Tavari Mozambique  0.1
22 Apr 2021 14:00 Ambatoxavavy Madagascar  0.1
24 Apr 2021 07:00 Boala Mozambique  0.1
24 Apr 2021 07:00 Quiwia Mozambique  0.1
22 Apr 2021 14:00 Ampombilava Madagascar  0.1
22 Apr 2021 14:00 Andriana Madagascar  0.1
22 Apr 2021 14:00 Ambaramidada Madagascar  0.1
24 Apr 2021 17:00 Kirongwe Tanzania  0.1
23 Apr 2021 12:00 Marere Mozambique  0.1
23 Apr 2021 12:00 Lucete Mozambique  0.1
24 Apr 2021 07:00 Palma Mozambique  0.1
23 Apr 2021 01:00 Kijini Tanzania  0.1
24 Apr 2021 21:00 Msasani Tanzania  0.1