Overall Green alert 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 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 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

    TOP

    Wind

      46 km/h Current Max.

      Up to 1.9 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 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

          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 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

          Country
          Portugal
          Spain

          Provinces

          Region Province Country
          Guarda Portugal
          Castilla y Leon Spain
          Braganca Portugal
          Viseu Portugal
          Castelo Branco Portugal
          Coimbra Portugal
          Aveiro Portugal
          Leiria Portugal
          Santarem Portugal

          Populated places

          Name Region Province Country City class Population
          Guarda Guarda Portugal City 28000 people
          Covilhã Castelo Branco Portugal City 18000 people
          Viseu Viseu Portugal City 26000 people
          Ovar Aveiro Portugal City 18000 people
          Coimbra Coimbra Portugal Major city 110000 people
          Aveiro Aveiro Portugal City 54000 people
          Ílhavo Aveiro Portugal City 17000 people
          Pombal Leiria Portugal City 17000 people
          Figueira da Foz Coimbra Portugal City 12000 people
          Leiria Leiria Portugal City 45000 people
          Marinha Grande Leiria Portugal City 29000 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)
          Covilha COV 482 Civ. Paved No 3100
          Viseu VSE 628 Civ. Paved No 3200
          Coimbra CBP 179 Civ. Paved No 3000
          Aveiro 8 Civ. Paved No 4500
          Monte Real 57 Mil. Paved Yes 8000

          Ports

          Name LOCODE Country
          Aveiro PTAVE Portugal
          Figueira Da Foz PTFDF Portugal
          Nazare Portugal

          Dams

          Reservoir Dam Name River Year
          Saucelle Duero 1956
          Pocinho Douro 1982
          Vilar Tavora 1965
          Santa Luzia Unhais 1942
          Aguieira Mondego 1981
          Fronhas Alva 1984
          Raiva Mondego 1981
          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

          0.3 m

          The maximum Storm surge height is  0.3m in Figueira da Foz, Portugal. This height is estimated for 18 Sep 2020 18:30 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 (17 locations). Calculation based on advisory number 2 of 18 Sep 2020 21:00:00 UTC. (Simulation using 0.5 minute resolution)

          Alert Date (UTC) Name Country Storm surge height (m)
          18 Sep 2020 18:30 Figueira da Foz Portugal  0.3
          18 Sep 2020 18:30 Leirosa Portugal  0.3
          18 Sep 2020 18:30 Costa de Lavos Portugal  0.3
          18 Sep 2020 18:30 Pedrogao Portugal  0.3
          18 Sep 2020 19:30 Quiaios Portugal  0.2
          18 Sep 2020 17:30 S. Pedro de Muel Portugal  0.2
          18 Sep 2020 19:30 Bom Sucesso Portugal  0.2
          18 Sep 2020 19:30 Praia da Tocha Portugal  0.1
          18 Sep 2020 17:30 S. Martinho do Porto Portugal  0.1
          18 Sep 2020 17:30 Vale de Paredes Portugal  0.1
          18 Sep 2020 20:30 Praia de Mira Portugal  0.1
          18 Sep 2020 21:30 Gafanha da Boa Hora Portugal  0.1
          18 Sep 2020 17:30 Nazare Portugal  0.1
          18 Sep 2020 17:30 Nazare Portugal  0.1
          18 Sep 2020 21:30 Gafanha do Carmo Portugal  0.1
          18 Sep 2020 20:30 Sao Jacinto Portugal  0.1
          18 Sep 2020 17:30 Consolacao Portugal  0.1