Overall Red Tropical Cyclone alert for CHANTHU-21 in China, Philippines from 06 Sep 2021 06:00 UTC to 07 Sep 2021 06:00 UTC

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

Overall Red alert Tropical Cyclone for CHANTHU-21

in China, Philippines

07 Sep 2021 06 UTC

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Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

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

Meteorological source	GDACS
Glide number:	TC-2021-000140-PHL
Exposed countries	China, Philippines
Exposed population	5 million in Category 1 or higher
Maximum wind speed	287 km/h
Maximum storm surge	0.2 m (11 Sep 03:00 UTC)
Vulnerability	Medium (China)

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	213 km/h	0.2 m	n.a.	1.5
Overall	287 km/h	0.2 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

213 km/h Current Max.

Up to 5.9 million people in Category 1 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	06 Sep 2021 06:00	176	1.2 million	No people	Japan, China
2	06 Sep 2021 12:00	176	670 thousand	No people	Japan, China
3	06 Sep 2021 18:00	194	8.7 million	1.7 million	China
4	07 Sep 2021 00:00	194	12.2 million	3.5 million	China
5	07 Sep 2021 06:00	213	27.9 million	5.9 million	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)
1	06 Sep 2021 06:00	Tropical depression	46	no people	no people	14, 138.3
2	06 Sep 2021 12:00	Tropical depression	56	no people	no people	14.7, 138.1
3	06 Sep 2021 18:00	Tropical storm	83	no people	no people	15.3, 137.4
4	07 Sep 2021 00:00	Tropical storm	93	no people	no people	15.6, 136.6
5	07 Sep 2021 06:00	Category 1	120	no people	no people	16.1, 135.7
5	07 Sep 2021 18:00	Category 1	148	no people	no people	16.5, 134.1
5	08 Sep 2021 06:00	Category 2	176	no people	no people	16.7, 132.3
5	08 Sep 2021 18:00	Category 3	194	no people	no people	17.1, 130.5
5	09 Sep 2021 06:00	Category 3	204	no people	no people	17.7, 128.5
5	10 Sep 2021 06:00	Category 4	213	6900 people	3.1 million people	19.6, 124.6
5	11 Sep 2021 06:00	Category 4	213	5.9 million people	27.9 million people	21.5, 121.8
5	12 Sep 2021 06:00	Category 2	157	no people	no people	23.2, 119.5

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

Provinces

Region Province	Country
Taiwan	China

Populated places

Name	Region Province	Country	City class	Population
O-luan-pi	P'ing-tung	Taiwan	City	-
Tai-tung	T'ai-tung	Taiwan	City	-
Maobitou	P'ing-tung	Taiwan	City	-
Ta-wu	T'ai-tung	Taiwan	City	-
Heng-chjun	P'ing-tung	Taiwan	City	-
Chao-chou	P'ing-tung	Taiwan	City	-
Tung-chiang	P'ing-tung	Taiwan	City	-
Wu-lung	P'ing-tung	Taiwan	City	-
Liu-chiu Hsu	P'ing-tung	Taiwan	City	-
Ping-tung	P'ing-tung	Taiwan	Major city	-
Feng-shan	Kao-hsiung	Taiwan	Major city	-
Chi-shan	Kao-hsiung	Taiwan	City	-
Kao-hsiung	Kao-hsiung Chuen-shih	Taiwan	Major city	-
Kang-shan	Kao-hsiung	Taiwan	City	-
Hsin-hua	T'ai-nan	Taiwan	City	-
Hai-pu	Kao-hsiung	Taiwan	City	-
Tai-nan	T'ai-nan Shih	Taiwan	Major city	-
Hsin-ying	T'ai-nan	Taiwan	Major city	-
Ma-tou	T'ai-nan	Taiwan	City	-
Chia-li	T'ai-nan	Taiwan	City	-
Hsüeh-chia	T'ai-nan	Taiwan	City	-
Po-tzu	Chia-i	Taiwan	City	-
Ma-kung	P'eng-hu	Taiwan	Major 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)
Orchid Island	KYD	10	Civ.	Paved	No	4500
Taitung	TTT	37	Mil.	Paved	No	11000
Feng Nin		42	Civ.	Paved	Yes	7900
Hengchun	HCN	13	Civ.	Paved	No	3500
Pingtung North		29	Mil.	Paved	No	8000
Pingtung South		24	Mil.	Paved	Yes	7800
Kaohsiung International	KHH	9	Civ.	Paved	Yes	10300
Tso Ying		9				0
Kangshan		10	Mil.	Paved	No	7500
Highway Strip 331 334		11				0
Kuei Jen		30				0
Tainan	TNN	19	Mil.	Paved	Yes	10000
Highway Strip 296 298		9				0
Makung AB	MZG	31	Mil.	Paved	Yes	6500
P Eng Hu		21				0
Wang An		30				0
Chi Mei	CMJ	unknown				0

Ports

Name	LOCODE	Country
Lan Yu Island		Taiwan
Tai Tung		Taiwan
Kaohsiung	TWKHH	Taiwan
Tai Nan		Taiwan
An Ping Chiang		Taiwan
Peng Hu		Taiwan

Dams

Reservoir	Dam Name	River	Year
	Tsengwen	Tsengwen	1973
	Wushantou	Offstream Kuantien	1930

Nuclear plants

Name	Country	Reactors
MAANSHAN	TAIWAN	2

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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

0.2 m

The maximum Storm surge height is 0.2m in Raile, Philippines. This height is estimated for 11 Sep 2021 03:00 UTC .

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 (8 locations). Calculation based on advisory number 5 of 07 Sep 2021 06:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	11 Sep 2021 03:00	Raile	Philippines	0.2
	11 Sep 2021 03:00	Itbayat	Philippines	0.2
	11 Sep 2021 03:00	Santa Lucia	Philippines	0.2
	11 Sep 2021 06:00	Yeh-yu	Taiwan	0.1
	11 Sep 2021 06:00	I-la-la-la-k'ou	Taiwan	0.1
	11 Sep 2021 00:00	Mahatao	Philippines	0.1
	11 Sep 2021 00:00	Basco	Philippines	0.1
	11 Sep 2021 06:00	Hung-t'on	Taiwan	0.1

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.