Overall Green alert Tropical Cyclone for IAN-14
in Tonga
06 Jan 2014 18 UTC
click on to select bulletin time
  • JRC
Impact Single TC
    Impact based on all weather systems in the area

    Impact

      Tropical Cyclone IAN-14 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

      Meteorological source GDACS
      Exposed countries Tonga
      Exposed population No people in Category 1 or higher
      Maximum wind speed 232 km/h
      Maximum storm surge 0.6 m (11 Jan 01:00 UTC)
      Vulnerability Medium (Tonga)

      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 101 km/h 0.6 m n.a. 0.5
      Overall 232 km/h 0.6 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

        101 km/h Current Max.

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        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 05 Jan 2014 18:00 93 No people No people
          Green 2 06 Jan 2014 06:00 93 No people No people Tonga
          Green 3 06 Jan 2014 18:00 101 No people No people Tonga

          Bulletin Timeline

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            **
            Tropical disturbance/Weak low pressure area/Remnant low (Vmax < 51 km/h), see WMO
            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

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            Provinces

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            Populated places

            Name Region Province Country City class Population
            Nuku'alofa Tonga Capital 24000 people

            Critical infrastructure

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

            Airports

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            Ports

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            Dams

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            Nuclear plants

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            Nuclear power plants

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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

            No locations affected by storm surge > 10 cm

            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.

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            Alert Date (UTC) Name Country Storm surge height (m)
            11 Jan 2014 01:00 Pangai Tonga  0.6