Overall Orange alert Tropical Cyclone for SINLAKU-20
in Viet Nam, Laos, China, Thailand
Impact Single TC
Impact all weather systems in the area


Tropical Cyclone SINLAKU-20 can have a medium humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GDACS (JTWC)
Exposed countries Viet Nam, Laos, China, Thailand
Exposed population No people in Category 1 or higher
Maximum wind speed 65 km/h
Maximum storm surge 1.2 m (02 Aug 04:00 UTC)
Vulnerability High (Vietnam)


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 65 km/h 1.2 m n.a. 1.5
GDACS Overall 65 km/h 1.2 m n.a. 1.5

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


65 km/h Current

Up to 29.9 million people in Tropical storm (see SSHS)

Impact Timeline

Alert Date (UTC) Max Winds (km/h) Population in
Tropical Storm
Population in
Cat. 1 or higher
Orange 1 01 Aug 2020 06:00 74 43.5 million No people China, Viet Nam, Laos
Orange 2 01 Aug 2020 12:00 74 43.5 million No people China, Viet Nam, Laos
Orange 3 01 Aug 2020 18:00 65 34.4 million No people Viet Nam, Laos, China, Thailand
Orange 4 02 Aug 2020 00:00 65 33.4 million No people Viet Nam, Laos, Thailand, China
Orange 5 02 Aug 2020 06:00 65 30 million No people Viet Nam, Laos, China

Bulletin Timeline

Alert Date (UTC) Category Max winds
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
1 01 Aug 2020 06:00 Tropical storm 65 32.4 million people no people 18.9, 108.4 Viet Nam
2 01 Aug 2020 12:00 Tropical storm 65 37.2 million people no people 19.2, 107.5 Viet Nam
3 01 Aug 2020 18:00 Tropical storm 65 28.6 million people no people 18.8, 106.6 Viet Nam
4 02 Aug 2020 00:00 Tropical storm 65 26.9 million people no people 19, 106.2 Viet Nam
5 02 Aug 2020 06:00 Tropical storm 65 18.3 million people no people 19.7, 105.8 Viet Nam
5 02 Aug 2020 18:00 Tropical depression 56 no people no people 20.1, 103.9 Viet Nam
5 03 Aug 2020 06:00 Tropical depression 37 no people no people 20.5, 101.9 China
Actual track of the current bulletin
The alert for forecast greater than 3 days is limited to Orange level.

Exposed population




Region Province Country Population
Thanh Hoa Viet Nam 3.3 million people
Nghe An Viet Nam 2.7 million people
Ninh Binh Viet Nam 850000 people
Nam Ha Viet Nam 2.6 million people
Hoa Binh Viet Nam 720000 people
Thai Binh Viet Nam 1.8 million people
Houaphan Laos 270000 people
Ha Tay Viet Nam 2.2 million people
Hai Hung Viet Nam 2.7 million people
Ha Tinh Viet Nam 1.3 million people
Hai Phong Viet Nam 1.6 million people
Borikhamxai Laos 160000 people
Ha Noi Viet Nam 2.1 million people
Son La Viet Nam 780000 people
Ha Bac Viet Nam 2.3 million people
Vinh Phu Viet Nam 2.2 million people
Quang Ninh Viet Nam 910000 people
Xiangkhoang Laos 210000 people
Khammouan Laos 280000 people
Quang Binh Viet Nam 740000 people
Louangphrabang Laos 380000 people
Savannakhet Laos 720000 people
Lai Chau Viet Nam 500000 people
Hainan China 7.2 million people
Quang Tri Viet Nam 520000 people

Populated places

Name Region Province Country City class Population
Sam Son Thanh Hoa Vietnam City -
Thanh Hóa Thanh Hoa Vietnam City 110000 people
Ninh Bình Ninh Binh Vietnam City 36000 people
Nam Dinh Nam Dimh Vietnam City 190000 people
Thuan Nghiep Thai Binh Vietnam City -
Phu Lý Ha Namh Vietnam City 31000 people
Thái Bình Thai Binh Vietnam City 52000 people
Vinh Nghe An Vietnam City 100000 people
Hòa Bình Hoa Binh Vietnam City 100000 people
Hai Duong Hai Duong Vietnam City 57000 people
Hai Phòng Hai Duong Vietnam Major city 590000 people
Thuy U Hai Duong Vietnam City -
Cam Pha Quang Ninh Vietnam City 130000 people
Dong Hoi Quang Binh Vietnam City 30000 people
Duntou Hainan China City -
Huangliu Hainan China City -
Yacheng Hainan China City -
Lingao Hainan China City 64000 people
Sanya Hainan China City 140000 people
Baocheng Hainan China City -
Yulin Hainan China City -
Jinjiang Hainan China City -
Lingcheng Hainan China City -
Wancheng Hainan China City -

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)
Bai Thuong 13 0
Vinh VII 11 Mil. Unpaved No 7100
Hai Phong Kien An 4 0
Hai Phong Cat Bi HPH 30480 Civ. Paved No 7800
Xayabury XAY unknown 0
Ban Nape 762 0
Sam Neua NEU 1000 Civ. Unpaved No 3400
Udomxay UDO unknown 0
Houeisay HOE unknown 0
Muang Phonsavan 1100 0
Xieng Khouang XKH 1067 Civ. Unpaved No 4900
Foluo Northeast 165 0
Sanya (Fenghuang) SYX 28 Civ. Paved Yes 11100
Jtalaishi 121 0
Sanya-Yaxian 15 0
Lingshui 25 0


Name LOCODE Country
Le Mon Vietnam
Vinh VNVNH Vietnam
Ben Thuy VNNGT Vietnam
Haiphong VNHPH Vietnam
Yu Lin Vietnam
Hongai VNHON Vietnam
Cam Pha Vietnam
Dong Hoi VNDOH Vietnam
Basuo CNBAS China
Paso China
Cua Lo China
Lin Kao China
Sanya CNSYX China
Yu Lin Chiang China
Cape Bastion China


Reservoir Dam Name River Year
Hoa Binh Da 1994
Tuoxin Ganen He 1978
Daguanba Changhua Jiang 1995
Shilu Shilu 1973
Changmao Wanglou 1960
Baogu Hingyuan 1979
Songtao Nandu Jiang 1970
Banling Shanya 1969
Fushan Huachang 1974
Jiatan Haizai 1961
Xiaomei Duzuong 1975
Niululing Wanquan 1979


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.



1.2 m

The maximum Storm surge height is  1.2m in Yen Cat, Vietnam. This height is estimated for 02 Aug 2020 04:00 UTC .

The JRC has developed an experimental global storm surge model, which is run after each advisory issued by the regional tropical cyclone centres. 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 (424 locations). Calculation based on advisory number 5 of 02 Aug 2020 06:00:00 UTC. (Simulation using 0.5 minute resolution)

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