Overall Green alert Tropical Cyclone for CHALANE-20
in Mozambique, Zimbabwe, Madagascar, Botswana
24 Dec 2020 18 UTC
click on to select bulletin time
  • GDACS JTWC
Impact Single TC
Impact based on all weather systems in the area

Impact

    Tropical Cyclone CHALANE-20 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

    Meteorological source GDACS
    Exposed countries Mozambique, Zimbabwe, Madagascar, Botswana
    Exposed population No people in Category 1 or higher
    Maximum wind speed 111 km/h
    Maximum storm surge 0.5 m (27 Dec 20:00 UTC)
    Vulnerability High (Madagascar)
    Landfall between
    26 Dec 2020 18:00 - 27 Dec 2020 18:00
    in 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 93 km/h 0.5 m n.a. 0.5
    Overall 111 km/h 0.5 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

      93 km/h Current Max.

      Up to 9.3 million 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 24 Dec 2020 18:00 93 9.3 million No people Madagascar

        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 24 Dec 2020 18:00 Tropical storm 65 no people no people -15.8, 57.4
          GREEN
          		 1 25 Dec 2020 06:00 Tropical storm 74 no people no people -15.7, 55.5
          GREEN
          		 1 25 Dec 2020 18:00 Tropical storm 74 no people no people -15.5, 54.1
          GREEN
          		 1 26 Dec 2020 06:00 Tropical storm 83 no people 1.3 million people -15.5, 52.8
          GREEN
          		 1 26 Dec 2020 18:00 Tropical storm 93 no people 8.6 million people -15.8, 51.3
          GREEN
          		 1 27 Dec 2020 18:00 Tropical storm 74 no people 6.3 million people -17.1, 47.3 Madagascar
          GREEN
          		 1 28 Dec 2020 18:00 Tropical storm 65 no people 190000 people -18.6, 44.5 Madagascar
          GREEN
          		 1 29 Dec 2020 18:00 Tropical storm 93 no people no people -18.5, 41.1
          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
          Madagascar

          Provinces

          Region Province Country
          Antsiranana Madagascar
          Toamasina Madagascar
          Mahajanga Madagascar
          Antananarivo Madagascar
          Toliara Madagascar

          Populated places

          Name Region Province Country City class Population
          Antalaha Antsiranana Madagascar City 34000 people
          Sambava Antsiranana Madagascar City 31000 people
          Mananara Toamasina Madagascar City 41000 people
          Maroantsetra Toamasina Madagascar City 24000 people
          Andapa Antsiranana Madagascar City 20000 people
          Fenerive Toamasina Madagascar City -
          Tamatave Toamasina Madagascar City 200000 people
          Mandritsara Mahajanga Madagascar City -
          Antananarivo Antananarivo Madagascar Capital 1.4 million people
          Ambato Boeni Mahajanga Madagascar City -
          Marovoay Mahajanga Madagascar City 31000 people
          Saka Antananarivo Madagascar City -

          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)
          Antalaha Antsirabato ANM 6 Civ. Paved No 3900
          Sambava SVB 6 Civ. Paved No 5900
          Mananara Nord WMR 3 Civ. Paved No 4100
          Sainte Marie SMS 2 Civ. Paved No 3300
          Maroantsetra WMN 4 Civ. Paved No 4200
          Andapa ZWA 473 Civ. Paved No 4100
          Doany DOA unknown 0
          Toamasina TMM 6 Civ. Paved Yes 7200
          Mandritsara WMA 307 Civ. Unpaved No 3700
          Bealanana WBE 1120 0
          Befandriana WBD 250 Civ. Unpaved No 4100
          Ambatondrazaka WAM 766 Civ. Unpaved No 4200
          Antsohihy Ambalabe WAI 28 Civ. Paved No 4900
          Anahidrano 60 0
          Port Berge WPB 65 Civ. Unpaved No 4200
          Tsaratanana TTS 327 Civ. Unpaved No 4300
          Andriamena WAD unknown 0
          Antananarivo Ivato TNR 1279 Civ. Paved Yes 10100
          Madirovalo WMV unknown 0
          Mahajanga Amborovy MJN 26 Civ. Paved Yes 7200
          Tsiroanomandidy WTS 846 Civ. Unpaved No 3500
          Ambatomainty AMY unknown 0
          Ankavandra JVA 130 Civ. Unpaved No 3200
          Morafenobe TVA unknown 0
          Antsalova WAQ 168 Civ. Unpaved No 3000
          Maintirano MXT 30 Civ. Unpaved No 4200

          Ports

          Name LOCODE Country
          Antataha MGANM Madagascar
          Sambava MGSVB Madagascar
          Saint Mary Island Madagascar
          Port Sainte Marie Madagascar
          Mananara MGWMR Madagascar
          Maroantsetra MGWMN Madagascar
          Foulpointe Madagascar
          Fenerive Madagascar
          Tamatave (Toamasina) MGTMM Madagascar
          Majunga (Mahajanga) MGMJN Madagascar
          Maintirano MGMXT Madagascar

          Dams

          Reservoir Dam Name River Year
          Antanifotsy Antanifotsy 1958
          Sahamaloto Sahamaloto 1958
          Ambilivily 1954
          Amboromalandy 1934
          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.

          ...

          TOP

          StormSurge

          0.5 m

          The maximum Storm surge height is  0.5m in Antanamazava, Madagascar. This height is estimated for 27 Dec 2020 20:00 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 (201 locations). Calculation based on advisory number 1 of 24 Dec 2020 18:00:00 UTC. (Simulation using 0.5 minute resolution)

          Alert Date (UTC) Name Country Storm surge height (m)
          27 Dec 2020 20:00 Antanamazava Madagascar  0.5
          27 Dec 2020 20:00 Manehoko Madagascar  0.5
          27 Dec 2020 20:00 Ambatomainty Madagascar  0.5
          27 Dec 2020 03:00 Ivontaka Madagascar  0.4
          27 Dec 2020 20:00 Antanimandry Madagascar  0.4
          27 Dec 2020 20:00 Ambodibonara Madagascar  0.4
          27 Dec 2020 20:00 Tanambao Madagascar  0.4
          27 Dec 2020 20:00 Anjabe Madagascar  0.4
          27 Dec 2020 20:00 Andranomena Madagascar  0.4
          27 Dec 2020 03:00 Ambodimanga Madagascar  0.4
          27 Dec 2020 20:00 Andranofotsy Madagascar  0.4
          27 Dec 2020 03:00 Manompana Madagascar  0.4
          27 Dec 2020 03:00 Antanambe Madagascar  0.4
          27 Dec 2020 00:00 Fampotabe Madagascar  0.4
          27 Dec 2020 02:00 Andilamboahangy Madagascar  0.4
          27 Dec 2020 02:00 Ambatofitarafana Madagascar  0.4
          27 Dec 2020 03:00 Manambato Madagascar  0.4
          27 Dec 2020 20:00 Ambato Madagascar  0.4
          26 Dec 2020 22:00 Maroantsetra Madagascar  0.4
          26 Dec 2020 22:00 Andranofotsy Madagascar  0.4
          26 Dec 2020 22:00 Mahalevona Madagascar  0.4
          27 Dec 2020 03:00 Soanierana Ivongo Madagascar  0.4
          27 Dec 2020 03:00 Andrangazaha Madagascar  0.4
          27 Dec 2020 03:00 Fandrarazana Madagascar  0.4
          27 Dec 2020 03:00 Vatobe Madagascar  0.4
          27 Dec 2020 03:00 Seranambe Madagascar  0.4
          27 Dec 2020 03:00 Antanetilava Madagascar  0.4
          27 Dec 2020 00:00 Ambanizana Madagascar  0.4
          27 Dec 2020 00:00 Benjana Madagascar  0.4
          27 Dec 2020 00:00 Rantranavona Madagascar  0.4
          27 Dec 2020 00:00 Tampolo Madagascar  0.3
          27 Dec 2020 00:00 Antalavia Madagascar  0.3
          27 Dec 2020 04:00 Manakalana Madagascar  0.3
          27 Dec 2020 19:00 Bobasakoa Madagascar  0.3
          27 Dec 2020 04:00 Ampasina Madagascar  0.3
          27 Dec 2020 04:00 Ampasimbe Madagascar  0.3
          27 Dec 2020 21:00 Anjiabe Madagascar  0.3
          27 Dec 2020 04:00 Antakobola Madagascar  0.3
          27 Dec 2020 04:00 Analanampotsy Madagascar  0.3
          26 Dec 2020 21:00 Anantoraka Madagascar  0.3
          27 Dec 2020 05:00 Mahavanona Madagascar  0.3
          27 Dec 2020 20:00 Andriana Madagascar  0.3
          27 Dec 2020 20:00 Nosy Faly Madagascar  0.3
          27 Dec 2020 19:00 Fadrina Madagascar  0.3
          26 Dec 2020 21:00 Manambia Madagascar  0.3
          28 Dec 2020 02:00 Andanivato Madagascar  0.3
          28 Dec 2020 02:00 Ambatojoby Madagascar  0.3
          28 Dec 2020 02:00 Andramy Madagascar  0.3
          28 Dec 2020 02:00 Marotaola Madagascar  0.3
          28 Dec 2020 01:00 Mailakapasy Madagascar  0.3
          27 Dec 2020 00:00 Ambatoharana Madagascar  0.3
          27 Dec 2020 06:00 Fenerive Madagascar  0.3
          27 Dec 2020 21:00 Ambatoxavavy Madagascar  0.3
          27 Dec 2020 02:00 Mananara Madagascar  0.3
          27 Dec 2020 19:00 Ananalava Madagascar  0.3
          27 Dec 2020 20:00 Madirotelo Madagascar  0.3
          27 Dec 2020 00:00 Rantabe Madagascar  0.3
          27 Dec 2020 01:00 Anoromby Madagascar  0.3
          27 Dec 2020 01:00 Fananehana Madagascar  0.3
          27 Dec 2020 01:00 Manambolosy Madagascar  0.3
          27 Dec 2020 03:00 Lonkintsy Madagascar  0.3
          27 Dec 2020 03:00 Lokintsy Madagascar  0.3
          27 Dec 2020 03:00 Ambodiatafa Madagascar  0.3
          27 Dec 2020 19:00 Bevoay Madagascar  0.3
          28 Dec 2020 03:00 Mahabo Madagascar  0.3
          27 Dec 2020 19:00 Ambatobe Madagascar  0.2
          26 Dec 2020 21:00 Voloina Madagascar  0.2
          27 Dec 2020 00:00 Maintimbato Madagascar  0.2
          27 Dec 2020 03:00 Lohatrozona Madagascar  0.2
          27 Dec 2020 02:00 Tanambe Madagascar  0.2
          26 Dec 2020 23:00 Vinanivao Madagascar  0.2
          27 Dec 2020 06:00 Antsikafoka Madagascar  0.2
          26 Dec 2020 06:00 Ilomotro Madagascar  0.2
          26 Dec 2020 06:00 Andohonko Madagascar  0.2
          27 Dec 2020 20:00 Antsahampano Madagascar  0.2
          26 Dec 2020 06:00 Antsisikala Madagascar  0.2
          26 Dec 2020 06:00 Ankazomalemy Madagascar  0.2
          27 Dec 2020 04:00 Vohilava Madagascar  0.2
          26 Dec 2020 22:00 Anaovandrano Madagascar  0.2
          27 Dec 2020 06:00 Mahambo Madagascar  0.2
          27 Dec 2020 19:00 Marokitrana Madagascar  0.2
          28 Dec 2020 07:00 Anjiajia Madagascar  0.2
          28 Dec 2020 02:00 Ambodibonara Madagascar  0.2
          28 Dec 2020 02:00 Tsaratanana Madagascar  0.2
          28 Dec 2020 08:00 Antantiloky Madagascar  0.2
          28 Dec 2020 03:00 Majunga Madagascar  0.2
          27 Dec 2020 20:00 Andrafia Madagascar  0.2
          27 Dec 2020 01:00 Fahambahy Madagascar  0.2
          27 Dec 2020 01:00 Tampolo Madagascar  0.2
          27 Dec 2020 03:00 Ambodifototra Madagascar  0.2
          27 Dec 2020 19:00 Analalava Madagascar  0.2
          28 Dec 2020 09:00 Ankinganomby Madagascar  0.2
          28 Dec 2020 01:00 Ampasindava Madagascar  0.2
          28 Dec 2020 10:00 Boanamary Madagascar  0.2
          28 Dec 2020 09:00 Antonibe Madagascar  0.2
          28 Dec 2020 01:00 Ankinganifahatelo Madagascar  0.2
          28 Dec 2020 06:00 Amboaboaka Madagascar  0.2
          28 Dec 2020 05:00 Matahibory Madagascar  0.2
          28 Dec 2020 01:00 Ambaliha Madagascar  0.2
          27 Dec 2020 19:00 Andrafialava Madagascar  0.2
          28 Dec 2020 10:00 Manampatra Madagascar  0.2
          28 Dec 2020 16:00 Baly Madagascar  0.2
          26 Dec 2020 22:00 Anjanozana Madagascar  0.2
          28 Dec 2020 18:00 Reharaka Madagascar  0.2
          27 Dec 2020 07:00 Namahoaka Madagascar  0.2
          27 Dec 2020 07:00 Mahatsara Madagascar  0.2
          27 Dec 2020 18:00 Ampandrano Madagascar  0.2
          27 Dec 2020 18:00 Anjiamalandy Madagascar  0.2
          27 Dec 2020 18:00 Maromanjo Madagascar  0.2
          27 Dec 2020 18:00 Andamoty Madagascar  0.2
          27 Dec 2020 18:00 Ampiambesa Madagascar  0.2
          27 Dec 2020 18:00 Antetezampolaka Madagascar  0.2
          27 Dec 2020 18:00 Maromandia Madagascar  0.2
          28 Dec 2020 09:00 Ambalatsingy Madagascar  0.2
          28 Dec 2020 02:00 Ampasitsilavitra Madagascar  0.2
          28 Dec 2020 10:00 Ankerefo Madagascar  0.2
          28 Dec 2020 10:00 Ambalabao Madagascar  0.2
          28 Dec 2020 10:00 Bevatry Madagascar  0.2
          26 Dec 2020 22:00 Ampanavoana Madagascar  0.2
          27 Dec 2020 18:00 Ampasibe Madagascar  0.2
          27 Dec 2020 19:00 Maromokotra Madagascar  0.2
          28 Dec 2020 10:00 Vilamatsa Madagascar  0.2
          28 Dec 2020 00:00 Andranira Madagascar  0.2
          28 Dec 2020 05:00 Antaribao Madagascar  0.2
          27 Dec 2020 19:00 Mandrony Madagascar  0.2
          28 Dec 2020 11:00 Voalavo Madagascar  0.2
          27 Dec 2020 20:00 Ambaramidada Madagascar  0.2
          26 Dec 2020 06:00 Ambanisanjo Madagascar  0.2
          28 Dec 2020 18:00 Soahanina Madagascar  0.2
          27 Dec 2020 08:00 Foulpointe Madagascar  0.2
          28 Dec 2020 06:00 Ampapamena Madagascar  0.2
          28 Dec 2020 06:00 Masokoamena Madagascar  0.2
          27 Dec 2020 19:00 Ampombilava Madagascar  0.2
          26 Dec 2020 21:00 Antanjokatafana Madagascar  0.2
          26 Dec 2020 20:00 Ratsianarana Madagascar  0.2
          26 Dec 2020 20:00 Ambodivato Madagascar  0.2
          26 Dec 2020 22:00 Maniroka Madagascar  0.2
          28 Dec 2020 10:00 Katsepy Madagascar  0.2
          28 Dec 2020 12:00 Tsilambana Madagascar  0.2
          27 Dec 2020 23:00 Ambondrombe Madagascar  0.2
          27 Dec 2020 18:00 Anorotsangana Madagascar  0.1
          28 Dec 2020 01:00 Ampohana Madagascar  0.1
          27 Dec 2020 20:00 Anjajavy Madagascar  0.1
          28 Dec 2020 18:00 Maintirano Madagascar  0.1
          28 Dec 2020 04:00 Antetikireja Madagascar  0.1
          26 Dec 2020 06:00 Marovato Madagascar  0.1
          27 Dec 2020 22:00 Bejongoro Madagascar  0.1
          28 Dec 2020 08:00 Maconharumo Mozambique  0.1
          28 Dec 2020 02:00 Mahabo Madagascar  0.1
          28 Dec 2020 02:00 Antsianitia Madagascar  0.1
          27 Dec 2020 18:00 Fararano Madagascar  0.1
          27 Dec 2020 19:00 Antsorokaka Madagascar  0.1
          27 Dec 2020 18:00 Antanifatsy Madagascar  0.1
          28 Dec 2020 18:00 Kamendriky Madagascar  0.1
          26 Dec 2020 19:00 Ambohitralanana Madagascar  0.1
          27 Dec 2020 19:00 Antananabe Madagascar  0.1
          28 Dec 2020 11:00 Andranovoribe Madagascar  0.1
          28 Dec 2020 13:00 Ankerefo Madagascar  0.1
          28 Dec 2020 13:00 Marofototra Madagascar  0.1
          28 Dec 2020 11:00 Mulia Mozambique  0.1
          28 Dec 2020 18:00 Andemba Madagascar  0.1
          27 Dec 2020 19:00 Singalana Madagascar  0.1
          26 Dec 2020 21:00 Ambalabe Madagascar  0.1
          27 Dec 2020 05:00 Taratasy Madagascar  0.1
          27 Dec 2020 19:00 Ambodiadabo Madagascar  0.1
          27 Dec 2020 19:00 Androlavy Madagascar  0.1
          28 Dec 2020 13:00 Belavenoka Madagascar  0.1
          28 Dec 2020 14:00 Barra Mozambique  0.1
          28 Dec 2020 10:00 Ocone Mozambique  0.1
          28 Dec 2020 14:00 Quelimane do Sal Mozambique  0.1
          28 Dec 2020 14:00 Inhangulue Mozambique  0.1
          28 Dec 2020 14:00 Mendozo Mozambique  0.1
          28 Dec 2020 14:00 Magromane Mozambique  0.1
          28 Dec 2020 04:00 Nhangau Mozambique  0.1
          27 Dec 2020 05:00 Ambinanysahavary Madagascar  0.1
          27 Dec 2020 18:00 Mahatsaborimaika Madagascar  0.1
          27 Dec 2020 19:00 Dzamandzar Madagascar  0.1
          28 Dec 2020 08:00 Morrua Mozambique  0.1
          28 Dec 2020 08:00 Vila do Chinde Mozambique  0.1
          28 Dec 2020 05:00 Ampitilova Madagascar  0.1
          27 Dec 2020 22:00 Marosakoa Madagascar  0.1
          26 Dec 2020 06:00 Ampanakana Madagascar  0.1
          28 Dec 2020 18:00 Ampanihy Madagascar  0.1
          28 Dec 2020 18:00 Belailay Madagascar  0.1
          28 Dec 2020 18:00 Manomba Madagascar  0.1
          27 Dec 2020 15:00 Ampitily Madagascar  0.1
          28 Dec 2020 01:00 Ampasimpilily Madagascar  0.1
          28 Dec 2020 18:00 Tamotamo Madagascar  0.1
          28 Dec 2020 08:00 Tomodo Mozambique  0.1
          28 Dec 2020 14:00 Nhamatamanga Mozambique  0.1
          28 Dec 2020 08:00 Mutiba Mozambique  0.1
          28 Dec 2020 06:00 Chofandicho Mozambique  0.1
          28 Dec 2020 18:00 Manampea Madagascar  0.1
          28 Dec 2020 18:00 Ankoakala Madagascar  0.1
          27 Dec 2020 08:00 Antetezambaro Madagascar  0.1
          27 Dec 2020 08:00 Ambodimanga Madagascar  0.1
          27 Dec 2020 07:00 Vohitsara Madagascar  0.1
          27 Dec 2020 19:00 Ampasimena Madagascar  0.1
          27 Dec 2020 18:00 Marovoha Madagascar  0.1
          28 Dec 2020 08:00 Caliua Mozambique  0.1
          28 Dec 2020 08:00 Raraga Mozambique  0.1