Overall Orange Tropical Cyclone for LIONROCK-21 in Viet Nam, China from 07 Oct 2021 06:00 UTC to 10 Oct 2021 06:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Orange Tropical Cyclone for LIONROCK-21

in Viet Nam, China

10 Oct 2021 06 UTC

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Meteorological source:

GDACS JTWC

Impact Single TC

GFS
HWRF
ECMWF

Impact based on all weather systems in the area

Impact

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

Meteorological source	GDACS
Exposed countries	Viet Nam, China
Exposed population	No people in Category 1 or higher
Maximum wind speed	74 km/h
Maximum storm surge	n.a.
Vulnerability	High (Vietnam)
Landfall	between 10 Oct 2021 00:00 - 10 Oct 2021 06:00 in Viet Nam

GDACS Score

GDACS score for Tropical Cyclones is 0.5 (GREEN Level), 1.5 (ORANGE Level), 2.5 (RED Level)
For more info on GDACS core click here.

	Wind	Storm surge	Rainfall	GDACS score
Current	46 km/h	1.1 m	n.a.	0.5
Overall	74 km/h	1.1 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

46 km/h Current Max.

Up to 62.2 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	07 Oct 2021 06:00	65	21.5 million	No people	China, Viet Nam
2	07 Oct 2021 12:00	65	20.6 million	No people	China, Viet Nam
3	07 Oct 2021 18:00	74	38.3 million	No people	China, Viet Nam, Laos, Thailand
4	08 Oct 2021 00:00	74	54 million	No people	China, Viet Nam, Laos, Thailand
5	08 Oct 2021 06:00	74	66.6 million	No people	China, Viet Nam, Laos, Thailand
6	08 Oct 2021 12:00	74	57.4 million	No people	China, Viet Nam, Laos
7	08 Oct 2021 18:00	74	59.9 million	No people	China, Viet Nam, Laos
8	09 Oct 2021 00:00	74	64.3 million	No people	China, Viet Nam, Laos
9	09 Oct 2021 06:00	74	44.1 million	No people	China, Viet Nam
10	09 Oct 2021 12:00	74	55.1 million	No people	China, Viet Nam, Laos
11	09 Oct 2021 18:00	74	74 million	No people	China, Viet Nam, Laos, Thailand
12	10 Oct 2021 00:00	65	66.7 million	No people	Viet Nam, China, Laos
13	10 Oct 2021 06:00	46	62.2 million	No people	Viet Nam, China

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	07 Oct 2021 06:00	Tropical depression	56	no people	12.8 million people	17.1, 111
2	07 Oct 2021 12:00	Tropical depression	56	no people	12.7 million people	17.4, 110.7
3	07 Oct 2021 18:00	Tropical depression	56	no people	9.2 million people	17.3, 111.1
4	08 Oct 2021 00:00	Tropical storm	65	no people	10.9 million people	17.8, 110.8
5	08 Oct 2021 06:00	Tropical storm	65	no people	30 million people	18.5, 110.7
6	08 Oct 2021 12:00	Tropical storm	74	no people	25.2 million people	19, 110.3	China
7	08 Oct 2021 18:00	Tropical storm	65	no people	27.4 million people	19.5, 110.1	China
8	09 Oct 2021 00:00	Tropical storm	65	no people	30.4 million people	19.7, 109.5	China
9	09 Oct 2021 06:00	Tropical storm	65	no people	27 million people	20, 109.4	China
10	09 Oct 2021 12:00	Tropical storm	65	no people	33.1 million people	20.1, 109.1
11	09 Oct 2021 18:00	Tropical storm	65	no people	48.2 million people	20.2, 108.7
12	10 Oct 2021 00:00	Tropical storm	65	no people	34.1 million people	20.5, 107.4
13	10 Oct 2021 06:00	Tropical depression	46	no people	no people	20.8, 106.6	Viet Nam
13	10 Oct 2021 18:00	Tropical depression	37	no people	no people	20.4, 105.5	Viet Nam
13	11 Oct 2021 06:00	Tropical depression	28	no people	no people	20.1, 104.9	Laos, Viet Nam

Actual track of the current bulletin

The alert for forecast greater than 3 days is limited to Orange level.

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Exposed population - AoIs

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

Countries

Source: GADM and GHSL

Provinces

Source: GADM and GHSL

Critical infrastructure

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

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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

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.

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