Overall Green alert Tropical Cyclone for JOBO-21
in Tanzania, Seychelles
22 Apr 2021 12 UTC
click on to select bulletin time
  • GDACS JTWC
Impact Single TC
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 GDACS
    Exposed countries Tanzania, Seychelles
    Exposed population No people in Category 1 or higher
    Maximum wind speed 111 km/h
    Maximum storm surge 0.3 m (25 Apr 07:00 UTC)
    Vulnerability Medium (Tanzania)
    Landfall between
    24 Apr 2021 12:00 - 25 Apr 2021 12:00
    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 83 km/h 0.3 m n.a. 0.5
    Overall 111 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 GDACS impact

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    Wind

      83 km/h Current Max.

      Up to 750000 people in Tropical Storm 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
        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

        Bulletin Timeline

          Alert N° Date (UTC) Category
          (SSHS)           		Max winds
          (km/h)           		Population in
          Cat.1 or higher           		Population in
          Tropical Storm
          or higher           		Location (lat, lon) Countries
          GREEN
          		 1 21 Apr 2021 00:00 Tropical storm 83 no people <1000 people -10, 48.8
          GREEN
          		 2 21 Apr 2021 12:00 Tropical storm 111 no people <1000 people -9.7, 47.8
          GREEN
          		 3 22 Apr 2021 00:00 Tropical storm 93 no people <1000 people -10.4, 46.5
          GREEN
          		 4 22 Apr 2021 12:00 Tropical storm 83 no people no people -9.9, 45.1
          GREEN
          		 4 23 Apr 2021 00:00 Tropical storm 83 no people no people -9.7, 44
          GREEN
          		 4 23 Apr 2021 12:00 Tropical storm 74 no people no people -9.3, 42.9
          GREEN
          		 4 24 Apr 2021 00:00 Tropical storm 74 no people 54000 people -8.8, 41.8
          GREEN
          		 4 24 Apr 2021 12:00 Tropical storm 65 no people 750000 people -8.3, 40.7
          GREEN
          		 4 25 Apr 2021 12:00 Tropical depression 56 no people no people -8, 39.1 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
          Seychelles
          Tanzania

          Provinces

          Region Province Country
          Seychelles Seychelles
          Lindi Tanzania
          Pwani Tanzania
          Morogoro Tanzania

          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
          Mafia MFA 18 Civ. Unpaved No 5200

          Ports

          Name LOCODE Country
          Assumption Island Seychelles
          Cosmoledo Island Seychelles
          Astove Island Seychelles
          Kilondoni Tanzania
          Kilwa Masoko TZKIM Tanzania
          Kilwa Kivinje TZKIK Tanzania
          Kisiju Tanzania
          TOP

          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 Mbwera, Tanzania. This height is estimated for 25 Apr 2021 07:00 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 (40 locations). Calculation based on advisory number 4 of 22 Apr 2021 12:00:00 UTC. (Simulation using 0.5 minute resolution)

          Alert Date (UTC) Name Country Storm surge height (m)
          25 Apr 2021 07:00 Mbwera Tanzania  0.3
          25 Apr 2021 07:00 Kiechuru Tanzania  0.3
          25 Apr 2021 08:00 Jaja Tanzania  0.3
          25 Apr 2021 10:00 Somanga Tanzania  0.3
          24 Apr 2021 12:00 Meronvi Mozambique  0.2
          24 Apr 2021 09:00 Quissengue Mozambique  0.2
          25 Apr 2021 09:00 Pombwe Tanzania  0.2
          24 Apr 2021 12:00 Libambai Mozambique  0.2
          25 Apr 2021 06:00 Kilindoni Tanzania  0.2
          24 Apr 2021 12:00 Vila de Mocimboa da Praia Mozambique  0.2
          25 Apr 2021 03:00 Mwera Tanzania  0.2
          25 Apr 2021 06:00 Mchungu Tanzania  0.2
          25 Apr 2021 06:00 Nyambati Tanzania  0.2
          25 Apr 2021 06:00 Kiombani Tanzania  0.2
          25 Apr 2021 11:00 Matapatapa Tanzania  0.2
          25 Apr 2021 05:00 Kirongwe Tanzania  0.2
          25 Apr 2021 06:00 Mkarangama Tanzania  0.2
          25 Apr 2021 05:00 Kipingwe Tanzania  0.2
          24 Apr 2021 12:00 Bawala Mozambique  0.2
          24 Apr 2021 12:00 Olumbe Mozambique  0.2
          25 Apr 2021 12:00 Msindaji Tanzania  0.2
          25 Apr 2021 02:00 Jimbo Tanzania  0.2
          25 Apr 2021 02:00 Chole Tanzania  0.2
          24 Apr 2021 12:00 Maganja Mozambique  0.2
          24 Apr 2021 12:00 Pangane Mozambique  0.2
          22 Apr 2021 14:00 Ambatoxavavy Madagascar  0.1
          22 Apr 2021 14:00 Andrafia Madagascar  0.1
          22 Apr 2021 16:00 Ambato Madagascar  0.1
          22 Apr 2021 23:00 Anjiabe Madagascar  0.1
          22 Apr 2021 16:00 Nosy Faly Madagascar  0.1
          24 Apr 2021 14:00 Quiterajo Mozambique  0.1
          25 Apr 2021 12:00 Kisiju Tanzania  0.1
          24 Apr 2021 12:00 Quiwia Mozambique  0.1
          25 Apr 2021 12:00 Kilwa Kivinje Tanzania  0.1
          23 Apr 2021 21:00 Marere Mozambique  0.1
          23 Apr 2021 21:00 Lucete Mozambique  0.1
          24 Apr 2021 13:00 Palma Mozambique  0.1
          24 Apr 2021 12:00 Boala Mozambique  0.1
          25 Apr 2021 03:00 Kilwa Masoko Tanzania  0.1
          24 Apr 2021 01:00 Msimbati Tanzania  0.1