Overall Green Tropical Cyclone for ALPHA-20
in Portugal, Spain
19 Sep 2020 03 UTC
click on to select bulletin time
  • GDACS NOAA
Impact Single TC
Impact based on all weather systems in the area

Impact

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

    Meteorological source GDACS
    Exposed countries Portugal, Spain
    Exposed population No people in Category 1 or higher
    Maximum wind speed 83 km/h
    Maximum storm surge 0.3 m (18 Sep 18:30 UTC)
    Vulnerability Low (Portugal)
    Landfall between
    18 Sep 2020 21:00 - 19 Sep 2020 03:00
    in Portugal, Spain

    GDACS Score

    GDACS score for Tropical Cyclones is 0.5 (GREEN Level), 1.5 (ORANGE Level), 2.5 (RED Level)
    For more info on GDACS core click here.
      Wind Storm surge Rainfall GDACS score
    Current 46 km/h 0.3 m n.a. 0.5
    Overall 83 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

      46 km/h Current Max.

      Up to 1.9 million people in Tropical Storm strength or higher (see SSHS)

      Impact Timeline

        Level N° Date (UTC) Max Winds (km/h) Population in
        Tropical Storm or higher        		 Population in
        Cat 1. or higher        		 Countries
        Green 1 18 Sep 2020 16:30 83 3 million No people Portugal, Spain
        Green 2 18 Sep 2020 21:00 74 2.4 million No people Portugal, Spain
        Green 3 19 Sep 2020 03:00 46 1.9 million No people Portugal, Spain

        Bulletin Timeline

          Level 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 18 Sep 2020 16:30 Tropical storm 83 no people no people 39.9, -9.3
          GREEN
          		 2 18 Sep 2020 21:00 Tropical storm 74 no people 2 million people 40.4, -8.4 Portugal
          GREEN
          		 3 19 Sep 2020 03:00 Tropical depression 46 no people no people 40.9, -6.9 Portugal, Spain
          GREEN
          		 3 19 Sep 2020 12:00 Tropical depression 37 no people no people 42.6, -4.4 Spain
          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

          Source: GADM and GHSL

          Provinces

          Source: GADM and GHSL

          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

          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.