Overall Green alert Tropical Cyclone for IAN-14
in Tonga
13 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 93 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

        93 km/h Current Max.

        Up to 120000 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 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
          Green 4 07 Jan 2014 06:00 101 No people No people Tonga
          Green 5 07 Jan 2014 18:00 138 No people No people Tonga
          Green 6 08 Jan 2014 06:00 158 No people No people Tonga
          Orange 7 08 Jan 2014 18:00 185 No people 20 thousand Tonga
          Orange 8 09 Jan 2014 06:00 175 No people 20 thousand Tonga
          Red 9 09 Jan 2014 18:00 195 No people 20 thousand Tonga
          Green 10 10 Jan 2014 06:00 185 No people No people Tonga
          Green 11 10 Jan 2014 18:00 232 No people No people Tonga
          Green 12 11 Jan 2014 06:00 232 No people No people Tonga
          Green 13 11 Jan 2014 18:00 232 No people No people
          Green 14 12 Jan 2014 06:00 212 No people No people
          Green 15 12 Jan 2014 18:00 148 No people No people
          Green 16 13 Jan 2014 06:00 121 No people No people
          Green 17 13 Jan 2014 18:00 93 No people No people

          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 10/10/2014 3:00:00 PM Tropical depression 56 no people no people 23.8, -63.7
            **
            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

            Provinces

            Country Region Province
            Tonga Tonga

            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.

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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

            0.6 m

            The maximum Storm surge height is  0.6m in Pangai, Tonga. This height is estimated for 11 Jan 2014 01:00 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 (1 locations). Calculation based on advisory number 17 of 13 Jan 2014 18:00:00 UTC. (Simulation using 6 minute resolution)

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