Overall Red alert Tropical Cyclone for CHANTHU-21
in China, Philippines
07 Sep 2021 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 CHANTHU-21 can have a high humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

    Meteorological source GDACS
    Glide number: TC-2021-000140-PHL
    Exposed countries China, Philippines
    Exposed population 5 million in Category 1 or higher
    Maximum wind speed 287 km/h
    Maximum storm surge 0.7 m (10 Sep 20:00 UTC)
    Vulnerability Medium (China)

    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 241 km/h 0.7 m n.a. 1.5
    Overall 287 km/h 0.7 m n.a. 1.5

    Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track) based on GDACS impact

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    Wind

      241 km/h Current Max.

      Up to 55000 people in Category 1 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 06 Sep 2021 06:00 176 1.2 million No people Japan, China
        Green 2 06 Sep 2021 12:00 176 670 thousand No people Japan, China
        Orange 3 06 Sep 2021 18:00 194 8.7 million 1.7 million China
        Orange 4 07 Sep 2021 00:00 194 12.2 million 3.5 million China
        Orange 5 07 Sep 2021 06:00 213 27.9 million 5.9 million China
        Orange 6 07 Sep 2021 12:00 241 32.3 million 50 thousand 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 06 Sep 2021 06:00 Tropical depression 46 no people no people 14, 138.3
          GREEN
          		 2 06 Sep 2021 12:00 Tropical depression 56 no people no people 14.7, 138.1
          GREEN
          		 3 06 Sep 2021 18:00 Tropical storm 83 no people no people 15.3, 137.4
          GREEN
          		 4 07 Sep 2021 00:00 Tropical storm 93 no people no people 15.6, 136.6
          GREEN
          		 5 07 Sep 2021 06:00 Category 1 120 no people no people 16.1, 135.7
          GREEN
          		 6 07 Sep 2021 12:00 Category 1 130 no people no people 16.3, 134.6
          GREEN
          		 6 08 Sep 2021 00:00 Category 2 167 no people no people 16.4, 132.7
          GREEN
          		 6 08 Sep 2021 12:00 Category 3 194 no people no people 16.7, 130.9
          GREEN
          		 6 09 Sep 2021 00:00 Category 4 213 no people no people 17.1, 129.1
          GREEN
          		 6 09 Sep 2021 12:00 Category 4 231 no people 49000 people 17.9, 126.9
          ORANGE
          		 6 10 Sep 2021 12:00 Category 4 241 44000 people 6.5 million people 20, 122.9
          ORANGE
          		 6 11 Sep 2021 12:00 Category 4 213 39000 people 32.3 million people 21.7, 120.6
          GREEN
          		 6 12 Sep 2021 12:00 Category 2 167 no people no people 23.3, 118.4
          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
          Taiwan China

          Populated places

          Name Region Province Country City class Population
          O-luan-pi P'ing-tung Taiwan City -
          Maobitou P'ing-tung Taiwan City -
          Heng-chjun P'ing-tung Taiwan 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)
          Basco BSO 56 Civ. Paved No 4100

          Ports

          Name LOCODE Country
          Basco Philippines

          Nuclear plants

          Name Country Reactors
          MAANSHAN TAIWAN 2
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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

          0.7 m

          The maximum Storm surge height is  0.7m in Ivana, Philippines. This height is estimated for 10 Sep 2021 20:00 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 (22 locations). Calculation based on advisory number 6 of 07 Sep 2021 12:00:00 UTC. (Simulation using 0.5 minute resolution)

          Alert Date (UTC) Name Country Storm surge height (m)
          10 Sep 2021 20:00 Ivana Philippines  0.7
          10 Sep 2021 20:00 Mahatao Philippines  0.7
          10 Sep 2021 20:00 Itbud Philippines  0.7
          10 Sep 2021 20:00 Basco Philippines  0.7
          10 Sep 2021 21:00 Raile Philippines  0.7
          10 Sep 2021 21:00 Itbayat Philippines  0.7
          10 Sep 2021 21:00 Santa Lucia Philippines  0.7
          10 Sep 2021 20:00 Nakanmuan Philippines  0.5
          10 Sep 2021 20:00 Sabtang Philippines  0.5
          10 Sep 2021 20:00 Chavayan Philippines  0.5
          11 Sep 2021 12:00 Maobitou Taiwan  0.2
          11 Sep 2021 12:00 Ta-kuang Taiwan  0.2
          11 Sep 2021 12:00 Kenting Taiwan  0.2
          11 Sep 2021 12:00 Heng-chjun Taiwan  0.2
          11 Sep 2021 12:00 O-luan-pi Taiwan  0.2
          11 Sep 2021 12:00 Hsu-hai Taiwan  0.1
          11 Sep 2021 12:00 Chiang tzu Taiwan  0.1
          11 Sep 2021 12:00 Feng-chiang Taiwan  0.1
          11 Sep 2021 12:00 Kuo-ch'i Taiwan  0.1
          11 Sep 2021 12:00 She-liao Taiwan  0.1
          11 Sep 2021 12:00 Che-cheng Taiwan  0.1
          11 Sep 2021 12:00 Fang-shan Taiwan  0.1