Overall Green alert Tropical Cyclone for SONCA-17
in Viet Nam, Laos, Thailand
23 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 65 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

    TOP

    Wind

      65 km/h Current Max.

      Up to 2.1 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
        Green 4 21 Jul 2017 18:00 56 No people No people
        Green 5 22 Jul 2017 00:00 56 No people No people
        Green 6 22 Jul 2017 06:00 65 2 million No people China
        Green 7 22 Jul 2017 12:00 56 No people No people
        Green 8 22 Jul 2017 18:00 56 No people No people
        Green 9 23 Jul 2017 00:00 65 No people No people
        Green 10 23 Jul 2017 06:00 65 1.5 million No people China
        Green 11 23 Jul 2017 12:00 65 2.1 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
          		 4 21 Jul 2017 18:00 Tropical depression 46 no people no people 18.1, 112.6
          GREEN
          		 5 22 Jul 2017 00:00 Tropical depression 46 no people no people 18.2, 112.2
          GREEN
          		 6 22 Jul 2017 06:00 Tropical depression 56 no people no people 17.8, 112
          GREEN
          		 7 22 Jul 2017 12:00 Tropical depression 56 no people no people 17.7, 111.7
          GREEN
          		 8 22 Jul 2017 18:00 Tropical depression 56 no people no people 17.8, 111.2
          GREEN
          		 9 23 Jul 2017 00:00 Tropical storm 65 no people no people 17.6, 111.6
          GREEN
          		 10 23 Jul 2017 06:00 Tropical storm 65 no people no people 17.6, 111.3
          GREEN
          		 11 23 Jul 2017 12:00 Tropical storm 65 no people no people 17.4, 111.6
          GREEN
          		 11 24 Jul 2017 00:00 Tropical storm 65 no people 690000 people 17.7, 111.4 China
          GREEN
          		 11 24 Jul 2017 12:00 Tropical storm 65 no people 2.1 million people 18.3, 110.4 China
          GREEN
          		 11 25 Jul 2017 00:00 Tropical depression 56 no people no people 18.8, 109.4 China
          GREEN
          		 11 25 Jul 2017 12:00 Tropical depression 37 no people no people 19.3, 107.3
          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
          China

          Provinces

          Region Province Country
          Hainan China

          Populated places

          Name Region Province Country City class Population
          Wancheng Hainan China City -
          Lingcheng Hainan China City -
          Yulin Hainan China City -
          Baocheng Hainan China City -
          Sanya Hainan China City 140000 people
          Yacheng 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
          Sanya-Yaxian 15 0
          Sanya (Fenghuang) SYX 28 Civ. Paved Yes 11100
          Foluo Northeast 165 0

          Ports

          Name LOCODE Country
          Cape Bastion China
          Yu Lin Chiang China
          Sanya CNSYX China

          Dams

          Reservoir Dam Name River Year
          Xiaomei Duzuong 1975
          Niululing Wanquan 1979
          Banling Shanya 1969
          Baogu Hingyuan 1979
          Changmao Wanglou 1960
          Daguanba Changhua Jiang 1995
          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

          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.