Overall Green alert Tropical Cyclone for YAGI-18
in China, Japan


Tropical Cyclone YAGI-18 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GDACS
Exposed countries China, Japan
Exposed population No people in Category 1 or higher
Maximum wind speed 102 km/h
Maximum storm surge
Vulnerability Medium (China)


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
GDACS Current 83 km/h 0.0 m n.a. 0.5
GDACS 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)


83 km/h Current Max.

Up to 8.1 million people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm or higher
Population in
Cat 1. or higher
Green 1 06 Aug 2018 18:00 74 2.7 million No people Japan
Green 2 07 Aug 2018 00:00 83 8.1 million No people Japan

Bulletin Timeline

Alert Date (UTC) Category Max winds
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
1 06 Aug 2018 18:00 Tropical depression 46 no people no people 18.8, 133.4
2 07 Aug 2018 00:00 Tropical depression 46 no people no people 19.1, 133.2
2 07 Aug 2018 12:00 Tropical depression 56 no people no people 19.4, 133.2
2 08 Aug 2018 00:00 Tropical depression 56 no people no people 19.7, 133.4
2 08 Aug 2018 12:00 Tropical storm 65 no people no people 20.5, 134.3
2 09 Aug 2018 00:00 Tropical storm 65 no people no people 21.8, 134.7
2 10 Aug 2018 00:00 Tropical depression 56 no people no people 24.7, 134.5
2 11 Aug 2018 00:00 Tropical storm 65 8.1 million people no people 28.3, 133.2 Japan
2 12 Aug 2018 00:00 Tropical storm 83 no people no people 31.1, 130.9 Japan
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.

Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places




Region Province Country Population
Kyushu Japan 13.2 million people
Shikoku Japan 4.3 million people

Populated places

Name Region Province Country City class Population
O-nejime Kagoshima Japan City -
Makurazuki Kagoshima Japan City -
Kanoya Kagoshima Japan City 82000 people
Shibushi Kagoshima Japan City 18000 people
Taniyama Kagoshima Japan City -
Sueyoshi Kagoshima Japan City 19000 people
Kagoshima Kagoshima Japan Major city 540000 people
Miyakonojo Miyazaki Japan City 120000 people
Kokubu Kagoshima Japan City 57000 people
Kajiki Kagoshima Japan City 22000 people
Kamo Kagoshima Japan City -
Jogasaki Miyazaki Japan City -
Miyazaki Miyazaki Japan Major city 300000 people
Takaoka Miyazaki Japan City -
Sendai Kagoshima Japan City 71000 people
Tsuma Miyazaki Japan City -
Naka-harada Miyazaki Japan City -
Takanabe Miyazaki Japan City 22000 people
Hitoyoshi Kumamoto Japan City 37000 people
Nobeoka Miyazaki Japan City 120000 people
Yatsushiro Kumamoto Japan City 100000 people
Matsubase Kumamoto Japan City 25000 people
Nomo Nagasaki Japan City -
Kumamoto Kumamoto Japan Major city 670000 people
Saiki Oita Japan City 48000 people
Nagasaki Nagasaki Japan Major city 400000 people
Omura Nagasaki Japan City 75000 people
Omuta Fukuoka Japan City 140000 people
Tsurusaki Oita Japan City -
Saganoseki Oita Japan City -
Oita Oita Japan Major city 420000 people
Beppu Oita Japan City 120000 people
Hita Oita Japan City 60000 people
Saga Saga Japan Major city 160000 people
Sasebo Nagasaki Japan City 230000 people
Kurume Fukuoka Japan City 230000 people
Tosu Saga Japan City 63000 people

Critical infrastructure

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


Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Yakushima KUM 37 Civ. Paved Yes 4900
Tanegashima TNE 97 Civ. Paved Yes 4900
Nishinoomote IIN unknown 0
Kanoya 65 Civ. Paved Yes 7300
Miyazaki KMI 6 Civ. Paved Yes 8200
Kagoshima KOJ 276 Civ. Paved Yes 9800
Nyutabaru 79 Mil. Paved Yes 8800
Amakusa 103 0
Kumamoto KMJ 196 Civ. Paved Yes 9800
Nagasaki NGS 5 Civ. Paved Yes 9800
Beppu BPU unknown 0
Saga HSG 2 Civ. Paved Yes 6500
Metabaru 16 0


Name LOCODE Country
Tokara Island Japan
Yamagawa Japan
Makurazaki Japan
Kiire JPKII Japan
Shibushi JPSBS Japan
Aburatsu JPABU Japan
Amamioshima JPASJ Japan
Kagoshima JPKOJ Japan
Uchiumi Japan
Kushikino Japan
Miyazaki JPKMI Japan
Minamata JPMIN Japan
Naga Island Japan
Hosojima JPHSM Japan
Ushibuka Japan
Totoro Japan
Kojiro Japan
Nobeoka JPNOB Japan
Yatsushiro Japan
Misumi JPMIS Japan
Kuchinotsu JPKUC Japan
Ha Shima Japan
Saiki Ko Japan
Mogi Japan
Shimabara JPSMB Japan
Nagasaki JPNGS Japan
Tsukumi JPTMI Japan
Usuki JPUSK Japan
Miike JPMII Japan
Omuta JPOMU Japan
Saganoseki JPSAG Japan
Matsushima JPMAT Japan
Tsurusaki JPTSK Japan
Oita JPOIT Japan
Beppu JPBPU Japan
Sakito JPSTO Japan
Okawa Japan
Hiji Japan
Suminoe JPSUM Japan
Sasebo JPSSB Japan


Reservoir Dam Name River Year
Saikyo Saikyo Matanobugawa 1984
Osumiko Takakuma Kushiragawa 1968
Sakataniko Nichinan Sakatanigawa 1984
Takeyama Takeyama Usonokigawa 1986
Oyodogawadaiichi Oyodogawadaiichi Oyodogawa 1961
Oyodogawadaini Oyodogawadaini Oyodogawa 1932
Nojiriko Iwase Iwasegawa 1967
Onoko Ayaminami Honjogawa 1958
Otsuruko Tsuruda Sendaigawa 1965
Tachibana Tachibana Jarogawa 1963
Kogawa Kogawa Kogawa 1973
Hitotsuse Hitotsuse Hitotsusegawa 1963
Dokawa Dokawa Dokawa 1955
Ichifusa Ichifusa Kumagawa 1959
Ouchibaru Ouchibaru Mimigawa 1956
Saigo Saigo Mimigawa 1983
Nyuugashiibako Kamishiiba Mimigawa 1955
Uchitani Uchitani Itsukiogawa 1975
Tsukabaru Tsukabaru Mimigawa 1938
Kyoragi Kyoragi Iwaiguchigawa 1975
Higomidorikawako Midorikawa Midorikawa 1970
Kitagawa Kitagawa Kitagawa 1962
Fukasako Fukasako Fukasakogawa 1974
Oshidorinoike Bessho Chijiwagawa 1968
Ishiba Ishiba Mietanigawa 1973
Ogakura Ogakura Ogakuragawa 1974
Urakamisuigenchi Urakami Oidegawa 2001
Narumi Narumi Futamatagawa 1991
Serikawa Serikawa Serigawa 1956
Konoura Konoura Konouragawa 1969
Kayaze Kayaze Korigawa 2000
Amagatanichosuichi Jizobaru Jizobarugawa 1922
Nodaketameike Nodaketameike 1661
Hachinosuko Shimouke Tsuegawa 1972
Yamashitaike Yamashitaike Kuramotogawa 1918
Hyugami Hyugami Yabegawa 1959
Hiju Hiju Hijugawa 1968
Nagaiketameike Nagaike Zodogawa 1996
Gosho Gosho Chikugogawa 1990
Sayonoumi Kyuragi Kyuragigawa 1986


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.



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 2 of 07 Aug 2018 00:00:00 UTC. (Simulation using 6 minute resolution)

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