Overall Red alert Tropical Cyclone for CHANTHU-21
in China, Philippines

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 0.8 m (10 Sep 20:00 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 241 km/h 0.8 m n.a. 1.5
Overall 287 km/h 0.8 m n.a. 1.5

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

Wind

241 km/h Current Max.

Up to 1.4 million people in Category 1 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
Countries
Green 1 06 Sep 2021 06:00 176 1.2 million No people Japan, China
Green 2 06 Sep 2021 12:00 176 670 thousand No people Japan, China
Orange 3 06 Sep 2021 18:00 194 8.7 million 1.7 million China
Orange 4 07 Sep 2021 00:00 194 12.2 million 3.5 million China
Orange 5 07 Sep 2021 06:00 213 27.9 million 5.9 million China
Orange 6 07 Sep 2021 12:00 241 32.3 million 50 thousand China
Orange 7 07 Sep 2021 18:00 241 58 million 1.4 million China

Bulletin Timeline

Alert Date (UTC) Category
(SSHS)
Max winds
(km/h)
Population in
Tropical Storm
or higher
Population in
Cat.1 or higher
Location (lat, lon) Countries
GREEN
1 06 Sep 2021 06:00 Tropical depression 46 no people no people 14, 138.3
GREEN
2 06 Sep 2021 12:00 Tropical depression 56 no people no people 14.7, 138.1
GREEN
3 06 Sep 2021 18:00 Tropical storm 83 no people no people 15.3, 137.4
GREEN
4 07 Sep 2021 00:00 Tropical storm 93 no people no people 15.6, 136.6
GREEN
5 07 Sep 2021 06:00 Category 1 120 no people no people 16.1, 135.7
GREEN
6 07 Sep 2021 12:00 Category 1 130 no people no people 16.3, 134.6
GREEN
7 07 Sep 2021 18:00 Category 4 231 no people no people 16.3, 133.5
GREEN
7 08 Sep 2021 06:00 Category 4 250 no people no people 16.3, 131.6
GREEN
7 08 Sep 2021 18:00 Category 4 250 no people no people 16.7, 129.7
GREEN
7 09 Sep 2021 06:00 Category 4 241 no people no people 17.3, 127.6
GREEN
7 09 Sep 2021 18:00 Category 4 231 890000 people 16000 people 18.3, 125.4
ORANGE
7 10 Sep 2021 18:00 Category 4 241 12.7 million people 55000 people 20.4, 122.2
ORANGE
7 11 Sep 2021 18:00 Category 3 204 57.3 million people 1.3 million people 22, 119.9
GREEN
7 12 Sep 2021 18:00 Category 2 157 no people no people 23.6, 117.7
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 Population
Taiwan China 22.5 million people
Fujian China 33.3 million people
Guangdong China 69.6 million people

Populated places

Name Region Province Country City class Population
O-luan-pi P'ing-tung Taiwan City -
Maobitou P'ing-tung Taiwan City -
Heng-chjun P'ing-tung Taiwan City -
Duxun Fujian China City -
Chengguanzhen Fujian China City -
Zhaoan Guangdong China 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)
Basco BSO 56 Civ. Paved No 4100
Hengchun HCN 13 Civ. Paved No 3500

Ports

Name LOCODE Country
Basco Philippines

Dams

Reservoir Dam Name River Year
Zumalin Xugouxi 1976
Dutang Baiyinxi 1959

Nuclear plants

Name Country Reactors
MAANSHAN TAIWAN 2

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.

...

StormSurge

0.8 m

The maximum Storm surge height is  0.8m in Ivana, Philippines. This height is estimated for 10 Sep 2021 20:00 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 (123 locations). Calculation based on advisory number 7 of 07 Sep 2021 18:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
10 Sep 2021 20:00 Ivana Philippines  0.8
10 Sep 2021 20:00 Itbud Philippines  0.8
10 Sep 2021 20:00 Nakanmuan Philippines  0.8
10 Sep 2021 20:00 Sabtang Philippines  0.8
10 Sep 2021 20:00 Chavayan Philippines  0.8
10 Sep 2021 20:00 Mahatao Philippines  0.8
10 Sep 2021 20:00 Basco Philippines  0.8
10 Sep 2021 20:00 Raile Philippines  0.8
10 Sep 2021 20:00 Itbayat Philippines  0.8
10 Sep 2021 20:00 Santa Lucia Philippines  0.8
11 Sep 2021 18:00 Tung-chiang Taiwan  0.2
11 Sep 2021 18:00 T'ien-ch'ien-ts'o Taiwan  0.2
11 Sep 2021 18:00 Wu-lung Taiwan  0.2
11 Sep 2021 14:00 Feng-chiang Taiwan  0.2
11 Sep 2021 18:00 Liu-chiu Hsu Taiwan  0.2
11 Sep 2021 13:00 Maobitou Taiwan  0.2
11 Sep 2021 13:00 Ta-kuang Taiwan  0.2
11 Sep 2021 18:00 Liu'ao China  0.2
11 Sep 2021 18:00 Shui-ti-liao Taiwan  0.2
11 Sep 2021 18:00 Yakou China  0.2
11 Sep 2021 13:00 Kenting Taiwan  0.2
11 Sep 2021 18:00 Guleitou China  0.2
11 Sep 2021 18:00 Gangkou China  0.2
11 Sep 2021 18:00 Zhangban China  0.2
11 Sep 2021 18:00 Dongyuan China  0.2
11 Sep 2021 18:00 Dongsha China  0.2
11 Sep 2021 18:00 Lingchuan China  0.2
11 Sep 2021 18:00 Yongning China  0.2
11 Sep 2021 13:00 Heng-chjun Taiwan  0.1
11 Sep 2021 18:00 Chendai China  0.1
11 Sep 2021 18:00 Hsi-pu China  0.1
11 Sep 2021 18:00 Chengguanzhen China  0.1
11 Sep 2021 18:00 Chihu China  0.1
11 Sep 2021 15:00 Fang-shan Taiwan  0.1
11 Sep 2021 18:00 Shih-shih China  0.1
11 Sep 2021 18:00 Huqiu China  0.1
11 Sep 2021 18:00 Wutian China  0.1
11 Sep 2021 18:00 Xucuo China  0.1
11 Sep 2021 18:00 Gulangyu China  0.1
11 Sep 2021 18:00 Chen-hai China  0.1
11 Sep 2021 18:00 Daomei China  0.1
11 Sep 2021 18:00 Zhenhai China  0.1
11 Sep 2021 18:00 Qian'an China  0.1
11 Sep 2021 18:00 Chongwu China  0.1
11 Sep 2021 18:00 Songyu China  0.1
11 Sep 2021 18:00 Daitou China  0.1
11 Sep 2021 18:00 Hsiang-chih China  0.1
11 Sep 2021 18:00 Cao Yu China  0.1
11 Sep 2021 13:00 O-luan-pi Taiwan  0.1
11 Sep 2021 18:00 Gongqiancun China  0.1
11 Sep 2021 18:00 Shentu China  0.1
11 Sep 2021 18:00 Ch'ing-hsu Taiwan  0.1
11 Sep 2021 18:00 Yang-chai Taiwan  0.1
11 Sep 2021 18:00 Weitou China  0.1
11 Sep 2021 18:00 Chin-ching China  0.1
11 Sep 2021 18:00 Chencheng China  0.1
11 Sep 2021 18:00 Wangchuan China  0.1
11 Sep 2021 18:00 Dawu China  0.1
11 Sep 2021 18:00 Hsiao-tso China  0.1
11 Sep 2021 18:00 Xiamen China  0.1
11 Sep 2021 18:00 Baisheng China  0.1
11 Sep 2021 18:00 Shihu China  0.1
11 Sep 2021 18:00 Beicuo China  0.1
11 Sep 2021 13:00 She-liao Taiwan  0.1
11 Sep 2021 13:00 Che-cheng Taiwan  0.1
11 Sep 2021 12:00 Hsu-hai Taiwan  0.1
11 Sep 2021 12:00 Chiang tzu Taiwan  0.1
11 Sep 2021 18:00 Hsia-mei China  0.1
11 Sep 2021 18:00 Fotan China  0.1
11 Sep 2021 18:00 Fugong China  0.1
11 Sep 2021 18:00 Gangwei China  0.1
11 Sep 2021 18:00 Chiang-t'ien China  0.1
11 Sep 2021 18:00 Jiuzhen China  0.1
11 Sep 2021 18:00 Chin-men Taiwan  0.1
11 Sep 2021 18:00 Lianhe China  0.1
11 Sep 2021 18:00 Chin-men Tao Taiwan  0.1
11 Sep 2021 18:00 Fengwei China  0.1
11 Sep 2021 18:00 Meizhou China  0.1
11 Sep 2021 18:00 Hou-ta-ts'o Taiwan  0.1
11 Sep 2021 18:00 I-jen Taiwan  0.1
11 Sep 2021 18:00 Nanri China  0.1
11 Sep 2021 18:00 Fuye China  0.1
11 Sep 2021 11:00 Kuo-ch'i Taiwan  0.1
11 Sep 2021 18:00 San Shah China  0.1
11 Sep 2021 18:00 Guhuai China  0.1
11 Sep 2021 18:00 Chang-chiang China  0.1
11 Sep 2021 18:00 Chin-feng China  0.1
11 Sep 2021 18:00 Wuhang China  0.1
11 Sep 2021 18:00 Guanjing China  0.1
11 Sep 2021 18:00 Qingfeng China  0.1
11 Sep 2021 18:00 Pingtan China  0.1
11 Sep 2021 18:00 Houtian China  0.1
11 Sep 2021 18:00 Langqi China  0.1
11 Sep 2021 18:00 Tantou China  0.1
11 Sep 2021 18:00 Yunlong China  0.1
11 Sep 2021 18:00 Houzhai China  0.1
11 Sep 2021 18:00 Zhelin China  0.1
11 Sep 2021 18:00 Shenao China  0.1
11 Sep 2021 18:00 Nanao China  0.1
11 Sep 2021 18:00 Gongkou China  0.1
11 Sep 2021 18:00 Dongshan China  0.1
11 Sep 2021 18:00 Jiangtou China  0.1
11 Sep 2021 18:00 Hecuo China  0.1
11 Sep 2021 18:00 Liuwudian China  0.1
11 Sep 2021 18:00 Aotou China  0.1
11 Sep 2021 18:00 An-ting Taiwan  0.1
11 Sep 2021 18:00 Zhongmen China  0.1
11 Sep 2021 18:00 P'u-hsi China  0.1
11 Sep 2021 18:00 P'u-hsi-ch'eng China  0.1
11 Sep 2021 18:00 Pinghai China  0.1
11 Sep 2021 18:00 Fengwo China  0.1
11 Sep 2021 18:00 Tung-tai China  0.1
11 Sep 2021 18:00 Mabi China  0.1
11 Sep 2021 18:00 Guanban China  0.1
11 Sep 2021 18:00 Ting-hai China  0.1
11 Sep 2021 18:00 Anhai China  0.1
11 Sep 2021 18:00 Ch'ang-t'an-wo Taiwan  0.1
11 Sep 2021 18:00 Chia-ho-ts'un Taiwan  0.1
11 Sep 2021 18:00 Ta-lin-pu Taiwan  0.1
11 Sep 2021 18:00 Kao-hsiung Taiwan  0.1
11 Sep 2021 18:00 Kuei-shan Taiwan  0.1
11 Sep 2021 18:00 Hanjiang China  0.1
11 Sep 2021 18:00 Chiang-k'ou China  0.1