Overall Green alert Tropical Cyclone for SONCA-17
in Viet Nam, Laos, Thailand
21 Jul 2017 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 SONCA-17 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

    Meteorological source GDACS
    Exposed countries Viet Nam, Laos, Thailand
    Exposed population No people in Category 1 or higher
    Maximum wind speed 102 km/h
    Maximum storm surge n.a.
    Vulnerability High (Vietnam)

    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 n.a. n.a. 0.5
    Overall 102 km/h 0.0 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 8 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 21 Jul 2017 00:00 102 No people No people
        Orange 2 21 Jul 2017 06:00 74 34.9 million No people China, Viet Nam
        Green 3 21 Jul 2017 12:00 74 8 million No people China

        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 Jul 2017 00:00 Tropical depression 56 no people no people 17.1, 114.8
          GREEN
          		 2 21 Jul 2017 06:00 Tropical depression 56 no people no people 17.8, 113.7
          GREEN
          		 3 21 Jul 2017 12:00 Tropical depression 56 no people no people 18, 113.1
          GREEN
          		 3 22 Jul 2017 00:00 Tropical storm 65 no people 3.4 million people 18.6, 112 China
          GREEN
          		 3 22 Jul 2017 12:00 Tropical storm 74 no people 7.9 million people 19.1, 110.8 China
          GREEN
          		 3 23 Jul 2017 00:00 Tropical storm 65 no people 4.4 million people 19.6, 109.5 China
          GREEN
          		 3 23 Jul 2017 12:00 Tropical depression 56 no people no people 20.1, 108.2 China
          GREEN
          		 3 24 Jul 2017 12:00 Tropical depression 37 no people no people 21.2, 105.9 Viet Nam
          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
          China

          Provinces

          Region Province Country
          Hainan China
          Guangdong China

          Populated places

          Name Region Province Country City class Population
          Wancheng Hainan China City -
          Wencheng Hainan China City -
          Jiaji Hainan China City -
          Lingcheng Hainan China City -
          Dingcheng Hainan China City -
          Baocheng Hainan China City -
          Haikou Hainan China City 610000 people
          Jinjiang Hainan China City -
          Lingao Hainan China City 65000 people
          Duntou Hainan China 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)
          Lingshui 25 0
          Meilan HAK 23 0
          Haikou 26 Civ. Paved Yes 11800
          Jtalaishi 121 0

          Ports

          Name LOCODE Country
          Haikou CNHAK China
          Hsu Wen China
          Lin Kao China
          Paso China
          Basuo CNBAS China

          Dams

          Reservoir Dam Name River Year
          Niululing Wanquan 1979
          Xiaomei Duzuong 1975
          Jiatan Haizai 1961
          Fushan Huachang 1974
          Songtao Nandu Jiang 1970
          Shilu Shilu 1973
          Daguanba Changhua Jiang 1995
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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.