Overall Green alert Tropical Cyclone for WASI-20
in Samoa, Niue
21 Feb 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 WASI-20 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

    Meteorological source GDACS
    Exposed countries Samoa, Niue
    Exposed population No people in Category 1 or higher
    Maximum wind speed 102 km/h
    Maximum storm surge 0.2 m (22 Feb 03:00 UTC)
    Vulnerability Medium (Samoa)

    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 74 km/h 0.2 m n.a. 0.5
    Overall 102 km/h 0.2 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

      74 km/h Current Max.

      Up to 13000 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 Feb 2020 12:00 83 200 thousand No people Samoa
        Green 2 21 Feb 2020 18:00 74 10 thousand No people Samoa

        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 Feb 2020 12:00 Tropical depression 56 no people no people -12.7, -175.2
          GREEN
          		 2 21 Feb 2020 18:00 Tropical depression 56 no people 13000 people -13.2, -174.3 Samoa
          GREEN
          		 2 22 Feb 2020 06:00 Tropical storm 65 no people 13000 people -14.1, -172.7 Samoa
          GREEN
          		 2 22 Feb 2020 18:00 Tropical storm 65 no people no people -15.4, -171.5
          GREEN
          		 2 23 Feb 2020 06:00 Tropical storm 74 no people no people -17.6, -170.8
          GREEN
          		 2 23 Feb 2020 18:00 Tropical storm 74 no people no people -19.3, -170.8 Niue
          GREEN
          		 2 24 Feb 2020 18:00 Tropical depression 56 no people no people -21.9, -171.3
          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
          Samoa

          Provinces

          Region Province Country
          Samoa Samoa

          Critical infrastructure

          Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

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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

          0.2 m

          The maximum Storm surge height is  0.2m in Falelima, Samoa. This height is estimated for 22 Feb 2020 03:00 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 (16 locations). Calculation based on advisory number 2 of 21 Feb 2020 18:00:00 UTC. (Simulation using 0.5 minute resolution)

          Alert Date (UTC) Name Country Storm surge height (m)
          22 Feb 2020 03:00 Falelima Samoa  0.2
          22 Feb 2020 06:00 Gautavai Samoa  0.1
          22 Feb 2020 06:00 Satupaitea Samoa  0.1
          22 Feb 2020 03:00 Falealupo Samoa  0.1
          22 Feb 2020 06:00 Salelologa Samoa  0.1
          22 Feb 2020 08:00 Samatau Samoa  0.1
          22 Feb 2020 05:00 Salailua Samoa  0.1
          22 Feb 2020 05:00 Sasina Samoa  0.1
          22 Feb 2020 05:00 Leagiaga Samoa  0.1
          22 Feb 2020 05:00 Fagamalo Samoa  0.1
          22 Feb 2020 06:00 Puapua Samoa  0.1
          22 Feb 2020 06:00 Tuasivi Samoa  0.1
          22 Feb 2020 08:00 Fuailalo Samoa  0.1
          22 Feb 2020 08:00 Fasitootai Samoa  0.1
          22 Feb 2020 09:00 Faleaseela Samoa  0.1
          22 Feb 2020 09:00 Matautu Samoa  0.1