Overall Green Tropical Cyclone alert for SONCA-17 in Viet Nam, Laos, Thailand from 21 Jul 2017 00:00 UTC to 24 Jul 2017 00:00 UTC

24 Jul 2017 00 UTC

click on

to select bulletin time

Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone SONCA-17 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	GDACS
Exposed countries	Viet Nam, Laos, Thailand
Exposed population	No people in Category 1 or higher
Maximum wind speed	102 km/h
Maximum storm surge	n.a.
Vulnerability	High (Vietnam)

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	n.a.	n.a.	0.5
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) based on GDACS impact

TOP

Wind

93 km/h Current Max.

Up to 4.2 million people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

N°	Date (UTC)	Max Winds (km/h)	Population in Tropical Storm or higher	Population in Cat 1. or higher	Countries
1	21 Jul 2017 00:00	102	No people	No people
2	21 Jul 2017 06:00	74	34.9 million	No people	China, Viet Nam
3	21 Jul 2017 12:00	74	8 million	No people	China
4	21 Jul 2017 18:00	56	No people	No people
5	22 Jul 2017 00:00	56	No people	No people
6	22 Jul 2017 06:00	65	2 million	No people	China
7	22 Jul 2017 12:00	56	No people	No people
8	22 Jul 2017 18:00	56	No people	No people
9	23 Jul 2017 00:00	65	No people	No people
10	23 Jul 2017 06:00	65	1.5 million	No people	China
11	23 Jul 2017 12:00	65	2.1 million	No people	China
12	23 Jul 2017 18:00	83	2 million	No people	China, Viet Nam, Laos
13	24 Jul 2017 00:00	93	4.2 million	No people	China, Viet Nam, Laos, Thailand

Bulletin Timeline

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
1	21 Jul 2017 00:00	Tropical depression	56	no people	no people	17.1, 114.8
2	21 Jul 2017 06:00	Tropical depression	56	no people	no people	17.8, 113.7
3	21 Jul 2017 12:00	Tropical depression	56	no people	no people	18, 113.1
4	21 Jul 2017 18:00	Tropical depression	46	no people	no people	18.1, 112.6
5	22 Jul 2017 00:00	Tropical depression	46	no people	no people	18.2, 112.2
6	22 Jul 2017 06:00	Tropical depression	56	no people	no people	17.8, 112
7	22 Jul 2017 12:00	Tropical depression	56	no people	no people	17.7, 111.7
8	22 Jul 2017 18:00	Tropical depression	56	no people	no people	17.8, 111.2
9	23 Jul 2017 00:00	Tropical storm	65	no people	no people	17.6, 111.6
10	23 Jul 2017 06:00	Tropical storm	65	no people	no people	17.6, 111.3
11	23 Jul 2017 12:00	Tropical storm	65	no people	no people	17.4, 111.6
12	23 Jul 2017 18:00	Tropical storm	65	no people	no people	16.9, 111.6
13	24 Jul 2017 00:00	Tropical storm	74	no people	no people	17, 111.4
13	24 Jul 2017 12:00	Tropical storm	83	no people	1.9 million people	17.3, 110.6	China
13	25 Jul 2017 00:00	Tropical storm	93	no people	3 million people	17.8, 109.1	Viet Nam
13	25 Jul 2017 12:00	Tropical storm	83	no people	2.2 million people	18, 107	Viet Nam
13	26 Jul 2017 00:00	Tropical depression	37	no people	no people	17.7, 104.8	Viet Nam

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
Vietnam
Laos
Thailand

Provinces

Region Province	Country
Hainan	China
Quang Tri	Viet Nam
Quang Binh	Viet Nam
Khammouan	Laos
Ha Tinh	Viet Nam
Borikhamxai	Laos
Nakhon Phanom	Thailand

Populated places

Name	Region Province	Country	City class	Population
Lingcheng	Hainan	China	City	-
Yulin	Hainan	China	City	-
Sanya	Hainan	China	City	140000 people
Baocheng	Hainan	China	City	-
Yacheng	Hainan	China	City	-
Huangliu	Hainan	China	City	-
Dong Hoi	Quang Binh	Vietnam	City	31000 people
Muang Khammouan	Khammouan	Laos	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)
Lingshui		25				0
Sanya-Yaxian		15				0
Sanya (Fenghuang)	SYX	28	Civ.	Paved	Yes	11100
Foluo Northeast		165				0
Thakhek	THK	145	Civ.	Unpaved	No	4500
Nakhon Phanom West		176				0
Nakhon Phanom	KOP	138	Civ.	Paved	Yes	8000

Ports

Name	LOCODE	Country
Cape Bastion		China
Yu Lin Chiang		China
Sanya	CNSYX	China
Cua Lo		China
Dong Hoi	VNDOH	Vietnam
Yu Lin		Vietnam

Dams

Dam Name	River	Year
Xiaomei	Duzuong	1975
Banling	Shanya	1969
Baogu	Hingyuan	1979
Changmao	Wanglou	1960
Daguanba	Changhua Jiang	1995
Tuoxin	Ganen He	1978

TOP

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.

...

TOP

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.