Overall Green alert Tropical Cyclone for OMAIS-21
in Japan, Marshall Islands
21 Aug 2021 18 UTC
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  • GDACS JTWC
Impact Single TC
Impact based on all weather systems in the area

Impact

    Tropical Cyclone OMAIS-21 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

    Meteorological source GDACS
    Exposed countries Japan, Marshall Islands
    Exposed population No people in Category 1 or higher
    Maximum wind speed 93 km/h
    Maximum storm surge
    Vulnerability High (Marshall Is.)
    Landfall between
    23 Aug 2021 06:00 - 23 Aug 2021 18:00
    in Republic of Korea

    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 102 km/h 0.0 m n.a. 0.5
    Overall 93 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

      102 km/h Current Max.

      Up to 23.4 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 10 Aug 2021 12:00 65 No people No people
        Green 2 10 Aug 2021 18:00 65 No people No people
        Green 3 11 Aug 2021 00:00 65 No people No people
        Green 4 11 Aug 2021 06:00 65 No people No people
        Green 5 11 Aug 2021 12:00 56 No people No people
        Green 6 11 Aug 2021 18:00 56 No people No people
        Green 7 12 Aug 2021 00:00 56 No people No people
        Green 8 12 Aug 2021 06:00 56 No people No people
        Green 9 12 Aug 2021 12:00 74 No people No people
        Green 10 12 Aug 2021 18:00 74 4 thousand No people Guam
        Green 11 13 Aug 2021 00:00 83 160 thousand No people Guam
        Green 12 13 Aug 2021 06:00 111 170 thousand No people Guam
        Green 13 13 Aug 2021 12:00 120 170 thousand No people Guam
        Green 14 13 Aug 2021 18:00 120 170 thousand No people Guam
        Green 15 14 Aug 2021 00:00 130 160 thousand No people Guam
        Green 16 14 Aug 2021 06:00 139 170 thousand No people Marshall Islands, Guam
        Green 17 14 Aug 2021 12:00 139 170 thousand No people Marshall Islands, Guam
        Green 18 14 Aug 2021 18:00 139 170 thousand No people Marshall Islands, Guam
        Green 19 15 Aug 2021 00:00 139 160 thousand No people Marshall Islands, Guam
        Green 20 15 Aug 2021 06:00 148 160 thousand No people Marshall Islands, Guam
        Green 21 15 Aug 2021 12:00 139 Few people No people Marshall Islands
        Green 22 15 Aug 2021 18:00 139 Few people No people Marshall Islands
        Green 23 16 Aug 2021 00:00 139 Few people No people Marshall Islands
        Green 24 16 Aug 2021 06:00 139 Few people No people Marshall Islands
        Green 25 16 Aug 2021 12:00 139 Few people No people Marshall Islands
        Green 26 16 Aug 2021 18:00 139 Few people No people Marshall Islands
        Green 27 17 Aug 2021 00:00 130 Few people No people Marshall Islands
        Green 28 17 Aug 2021 06:00 37 Few people No people Marshall Islands
        Green 29 19 Aug 2021 12:00 74 10 thousand No people Japan, Marshall Islands
        Green 30 19 Aug 2021 18:00 83 1.3 million No people Japan, Marshall Islands
        Green 31 20 Aug 2021 00:00 83 430 thousand No people Japan, Marshall Islands
        Green 32 20 Aug 2021 06:00 74 60 thousand No people Japan, Marshall Islands
        Green 33 20 Aug 2021 12:00 74 110 thousand No people Japan, Marshall Islands
        Green 34 20 Aug 2021 18:00 74 170 thousand No people Japan, Republic of Korea, Marshall Islands
        Green 35 21 Aug 2021 00:00 93 11.7 million No people Japan, Republic of Korea, Marshall Islands
        Green 36 21 Aug 2021 06:00 93 23.1 million No people Japan, Republic of Korea, Marshall Islands
        Green 37 21 Aug 2021 12:00 102 25.8 million No people Japan, Republic of Korea, Marshall Islands
        Green 38 21 Aug 2021 18:00 102 23.4 million No people Japan, Republic of Korea, Russian Federation, Marshall Islands

        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 Aug 2021 12:00 Tropical depression 46 no people no people 12.2, 179
          GREEN
          		 2 10 Aug 2021 18:00 Tropical depression 56 no people no people 12.3, 178
          GREEN
          		 3 11 Aug 2021 00:00 Tropical depression 56 no people no people 12.3, 177.2
          GREEN
          		 4 11 Aug 2021 06:00 Tropical depression 56 no people no people 12.4, 176.6
          GREEN
          		 5 11 Aug 2021 12:00 Tropical depression 56 no people no people 12.1, 175.9
          GREEN
          		 6 11 Aug 2021 18:00 Tropical depression 56 no people no people 12.1, 175
          GREEN
          		 7 12 Aug 2021 00:00 Tropical depression 46 no people no people 12.1, 174
          GREEN
          		 8 12 Aug 2021 06:00 Tropical depression 46 no people no people 12.8, 172.7
          GREEN
          		 9 12 Aug 2021 12:00 Tropical depression 56 no people no people 12.6, 171.3
          GREEN
          		 10 12 Aug 2021 18:00 Tropical depression 56 no people no people 12.6, 169.9
          GREEN
          		 11 13 Aug 2021 00:00 Tropical storm 65 no people no people 12.7, 168.6
          GREEN
          		 12 13 Aug 2021 06:00 Tropical storm 65 no people no people 12.8, 167
          GREEN
          		 13 13 Aug 2021 12:00 Tropical storm 65 no people no people 12.8, 166.2
          GREEN
          		 14 13 Aug 2021 18:00 Tropical depression 56 no people no people 12.5, 164.9
          GREEN
          		 15 14 Aug 2021 00:00 Tropical depression 56 no people no people 12.5, 163.2
          GREEN
          		 16 14 Aug 2021 06:00 Tropical storm 65 no people <1000 people 12.3, 161.7
          GREEN
          		 17 14 Aug 2021 12:00 Tropical storm 65 no people no people 12.3, 160.3
          GREEN
          		 18 14 Aug 2021 18:00 Tropical storm 65 no people no people 12.3, 159
          GREEN
          		 19 15 Aug 2021 00:00 Tropical depression 56 no people no people 12.5, 157
          GREEN
          		 20 15 Aug 2021 06:00 Tropical depression 56 no people no people 12.7, 154.7
          GREEN
          		 21 15 Aug 2021 12:00 Tropical depression 46 no people no people 12.8, 154.4
          GREEN
          		 22 15 Aug 2021 18:00 Tropical depression 46 no people no people 12.9, 152.9
          GREEN
          		 23 16 Aug 2021 00:00 Tropical depression 46 no people no people 13.1, 151.3
          GREEN
          		 24 16 Aug 2021 06:00 Tropical depression 37 no people no people 13.6, 149.8
          GREEN
          		 25 16 Aug 2021 12:00 Tropical depression 37 no people no people 13.5, 148.2
          GREEN
          		 26 16 Aug 2021 18:00 Tropical depression 37 no people no people 12.9, 146.3
          GREEN
          		 27 17 Aug 2021 00:00 Tropical depression 37 no people no people 13.3, 145.1
          GREEN
          		 28 17 Aug 2021 06:00 Tropical depression 37 no people no people 13.4, 143.9
          GREEN
          		 29 19 Aug 2021 12:00 Tropical depression 46 no people no people 18.4, 132.9
          GREEN
          		 30 19 Aug 2021 18:00 Tropical depression 56 no people no people 18.5, 132.2
          GREEN
          		 31 20 Aug 2021 00:00 Tropical depression 56 no people no people 19, 130.9
          GREEN
          		 32 20 Aug 2021 06:00 Tropical depression 56 no people no people 19.1, 130.1
          GREEN
          		 33 20 Aug 2021 12:00 Tropical depression 56 no people no people 19.2, 129.5
          GREEN
          		 34 20 Aug 2021 18:00 Tropical storm 65 no people no people 20, 129.1
          GREEN
          		 35 21 Aug 2021 00:00 Tropical storm 83 no people no people 21.4, 128.2
          GREEN
          		 36 21 Aug 2021 06:00 Tropical storm 83 no people 46000 people 22, 127.7
          GREEN
          		 37 21 Aug 2021 12:00 Tropical storm 93 no people 53000 people 22.7, 127.1
          GREEN
          		 38 21 Aug 2021 18:00 Tropical storm 93 no people 53000 people 23.5, 126.6
          GREEN
          		 38 22 Aug 2021 06:00 Tropical storm 102 no people 61000 people 25.1, 125.8
          GREEN
          		 38 22 Aug 2021 18:00 Tropical storm 93 no people no people 27.7, 125
          GREEN
          		 38 23 Aug 2021 06:00 Tropical storm 83 no people 19.9 million people 31.2, 125.3
          GREEN
          		 38 23 Aug 2021 18:00 Tropical storm 74 no people 22.1 million people 35.4, 128 Republic of Korea
          GREEN
          		 38 24 Aug 2021 18:00 Tropical depression 56 no people no people 42.1, 133.8
          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
          Japan
          South Korea
          Russia
          Marshall Is.

          Provinces

          Region Province Country
          Okinawa Japan
          Cheju-do Republic of Korea
          Cholla-namdo Republic of Korea
          Kyongsang-namdo Republic of Korea
          Kwangju-jikhalsi Republic of Korea
          Pusan-jikhalsi Republic of Korea
          Cholla-bukto Republic of Korea
          Kyongsang-bukto Republic of Korea
          Taegu-jikhalsi Republic of Korea
          Ch'ungch'ong-namdo Republic of Korea
          Ch'ungch'ong-bukto Republic of Korea
          Kyonggi-do Republic of Korea
          Kangwon-do Republic of Korea
          Primorskiy kray Russian Federation
          Marshall Is. Marshall Islands

          Populated places

          Name Region Province Country City class Population
          Moseulpo Cheju-Do Republic of Korea City -
          Cheju Cheju-Do Republic of Korea City 330000 people
          Yeosu Chollanam-Do Republic of Korea City 200000 people
          Mogpo Chollanam-Do Republic of Korea City -
          Suncheon Chollanam-Do Republic of Korea City 190000 people
          Samcheongpo Kyongsangnam-Do Republic of Korea City -
          Naju Chollanam-Do Republic of Korea City 42000 people
          Kwangju Kwangju Republic of Korea Major city 1.2 million people
          Sacheon Kyongsangnam-Do Republic of Korea City 67000 people
          Jinju Kyongsangnam-Do Republic of Korea City -
          Chinhae Kyongsangnam-Do Republic of Korea City 130000 people
          Masan Kyongsangnam-Do Republic of Korea City 350000 people
          Busan Kyongsangnam-Do Republic of Korea Major city 3.6 million people
          Ulsan Kyongsangnam-Do Republic of Korea City 960000 people
          Gimje Chollabuk-Do Republic of Korea City -
          Jeonju Chollabuk-Do Republic of Korea City -
          Iksan Chollabuk-Do Republic of Korea City -
          Gunsan Chollabuk-Do Republic of Korea City 240000 people
          Daegu Taegu Republic of Korea Major city 2.6 million people
          Gyeongju Kyongsangbuk-Do Republic of Korea City -
          Yeanmudae Chungchongnam-Do Republic of Korea City -
          Yangmog Kyongsangbuk-Do Republic of Korea City -
          Ganggyeong Chungchongnam-Do Republic of Korea City -
          Gimcheon Kyongsangbuk-Do Republic of Korea City -
          Nonsan Chungchongnam-Do Republic of Korea City 43000 people
          Yeongdong Chungchongbuk-Do Republic of Korea City -
          Gumi Kyongsangbuk-Do Republic of Korea City -
          Pohang Kyongsangbuk-Do Republic of Korea City 300000 people
          Buyeo Chungchongnam-Do Republic of Korea City -
          Daejeon Taejon Republic of Korea Major city 1.2 million people
          Cheongju Chungchongbuk-Do Republic of Korea City 570000 people
          Andong Kyongsangbuk-Do Republic of Korea City 130000 people
          Yecheon Kyongsangbuk-Do Republic of Korea City -
          Eumseong Chungchongbuk-Do Republic of Korea City -
          Chungju Chungchongbuk-Do Republic of Korea City 180000 people
          Chechon Chungchongbuk-Do Republic of Korea City 120000 people
          Yeongweol Kang-Won-Do Republic of Korea City 26000 people
          Weonju Kang-Won-Do Republic of Korea City 200000 people
          Gangneung Kang-Won-Do Republic of Korea 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)
          Hirara MMY 45 Civ. Paved Yes 6500
          Shimojishima SHI 16 Civ. Paved Yes 9800
          9 0
          Kumejima UEO 7 Civ. Paved Yes 6500
          Aviation College 2 360 0
          Cheju International CJU 38 Civ. Paved Yes 9800
          Mokpo Yong Dang MPK 3 Civ. Paved Yes 5200
          Yeosu SYS 21 Civ. Paved Yes 5000
          Yosu RSU unknown 0
          Naegi Ri Highway Strip 13 0
          Geoje Heliport JGE unknown 0
          Kwangju KWJ 13 Mil. Paved Yes 9300
          Sachon HIN 8 Mil. Paved Yes 8900
          R 813 CHF 2 Mil. Paved No 3600
          R 712 9 0
          R 710 40 0
          Pusan Gimhae International PUS 4 Civ. Paved Yes 8900
          Pusan 2 Mil. Paved No 6500
          R 802 34 0
          Onyang Highway Strip 100 0
          Ulsan USN 9 Civ. Paved Yes 6500
          Jhunju 29 Civ. Paved No 4900
          Daegu AB KUV 9 Mil. Paved Yes 9000
          Chonju CHN unknown 0
          Daegu AB TAE 35 Mil. Paved Yes 9000
          R 806 26 0
          R 500 20 0
          R 522 166 0
          Pohang KPO 21 Mil. Paved Yes 7000
          R 536 28 0
          Taejon 63 0
          R 505 25 0
          Songmu 79 0
          Yechon AB YEC 108 Mil. Paved Yes 8900
          Chongju AB CJJ 58 Civ. Paved Yes 9000
          Choongwon AB 86 Mil. Paved No 9300
          R 605 291 0
          R 418 283 0
          R 430 2 0
          Samchok SUK unknown 0
          R 417 525 0
          Gangneung KAG 11 Mil. Paved Yes 8900
          Yangyang International 73 Mil. Paved No 3600
          Kiyevka 122 0
          Sokolovka 122 0
          Enewetak Aux Af ENT 4 Mil. Paved No 7700

          Ports

          Name LOCODE Country
          Myako Island Japan
          Hirara Japan
          Kume Island Japan
          Sonsan Po South Korea
          Cheju KRCHA South Korea
          Kumnyong South Korea
          Mokpo KRMOK South Korea
          Yosu KRYOS South Korea
          Samcheon Po South Korea
          Okpo KROKP South Korea
          Chinhai South Korea
          Masan KRMAS South Korea
          Pusan KRPUS South Korea
          Ulsan KRUSN South Korea
          Kunsan KRKUV South Korea
          Changhang KRCHG South Korea
          Pohang KRKPO South Korea
          Ulchin South Korea
          Tonghae KRTGH South Korea
          Mukho KRMUK South Korea
          To Dong Japan
          Vostochny RUVYP Russia
          Bukhta Sudzukhe Russia
          Bukhta Preobrazheniya Russia
          Eniwetok Marshall Islands

          Dams

          Reservoir Dam Name River Year
          Yangchon Trib. Samsan 1961
          Samjung Trib. Samjung 1985
          Sansu Haemi 1962
          Suo Suo 1978
          Isacheon Isa 1992
          Namgang Nam 1970
          Ungok Gwangryu 1961
          Junam Reservoir Junam Chuchon 1958
          Naejang Naejang 1964
          Okjeong Lake Somjingang Somjin 1965
          Hapchon Wi 1989
          Talchang Chachon n/a
          Unmun Tongchang n/a
          Songju Taega n/a
          Munchon Kumho 1959
          Sanmak Yeongdong 1963
          Angye Taehwa 1971
          Yongchon Trib. Angye 1959
          Daechong Geum 1981
          Samga Haengjung 1979
          Otae Trib. Dong 1959
          Hangye Hangye 1978
          Imha Panbyon 1993
          An Dong Nakdong 1977
          Wonnam Chopyung 1988
          Maengdong Kunja n/a
          Yonggye Ung n/a
          Mugeuk Trib. Han 1981
          Kumsok Ung n/a
          Chungju Namhan 1986
          Toam Song n/a

          Nuclear plants

          Name Country Reactors
          YONGGWANG REPUBLIC OF KOREA 6
          KORI REPUBLIC OF KOREA 4
          WOLSONG REPUBLIC OF KOREA 4
          ULCHIN REPUBLIC OF KOREA 6
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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 m

          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 (0 locations). Calculation based on advisory number 4 of 11 Aug 2021 06:00:00 UTC. (Simulation using 0.5 minute resolution)

          Alert Date (UTC) Name Country Storm surge height (m)