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 0.5 m (10 Sep 20:00 UTC)
Vulnerability Medium (China)
Landfall between
12 Sep 2021 00:00 - 13 Sep 2021 00:00

in 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 176 km/h 0.5 m n.a. 1.5
Overall 287 km/h 0.5 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

176 km/h Current Max.

Up to 1.9 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
Orange 8 08 Sep 2021 00:00 176 44.1 million 1.9 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
8 08 Sep 2021 00:00 Category 4 222 no people no people 16, 132.3
GREEN
8 08 Sep 2021 12:00 Category 4 250 no people no people 16, 130.4
GREEN
8 09 Sep 2021 00:00 Category 4 250 no people no people 16.3, 128.3
GREEN
8 09 Sep 2021 12:00 Category 4 231 84000 people no people 17.2, 126.1
GREEN
8 10 Sep 2021 00:00 Category 4 231 1.3 million people 3100 people 18.4, 124
GREEN
8 11 Sep 2021 00:00 Category 4 241 7 million people no people 20.4, 121.2
ORANGE
8 12 Sep 2021 00:00 Category 2 176 42.8 million people 1.9 million people 22.1, 119.1
GREEN
8 13 Sep 2021 00:00 Category 1 130 no people no people 23.8, 117.3 China
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
Fujian China 33.3 million people
Guangdong China 69.6 million people

Populated places

Name Region Province Country City class Population
Chengguanzhen Fujian China City -
Duxun Fujian China City -
Zhaoan Guangdong China City -
Zhelin Guangdong China City -
Xiahe Fujian China City -
Huanggang Guangdong China City 220000 people

Critical infrastructure

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

Dams

Reservoir Dam Name River Year
Zumalin Xugouxi 1976
Dutang Baiyinxi 1959
Fengtou Zhang Jiang 1977

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

0.5 m

The maximum Storm surge height is  0.5m in Nakanmuan, 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 (105 locations). Calculation based on advisory number 8 of 08 Sep 2021 00:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert Date (UTC) Name Country Storm surge height (m)
10 Sep 2021 20:00 Nakanmuan Philippines  0.5
10 Sep 2021 20:00 Sabtang Philippines  0.5
10 Sep 2021 20:00 Chavayan Philippines  0.5
10 Sep 2021 20:00 Ivana Philippines  0.4
10 Sep 2021 20:00 Itbud Philippines  0.4
10 Sep 2021 20:00 Mahatao Philippines  0.2
10 Sep 2021 20:00 Basco Philippines  0.2
12 Sep 2021 00:00 Guleitou China  0.2
12 Sep 2021 00:00 Gangkou China  0.2
12 Sep 2021 00:00 Liu'ao China  0.2
12 Sep 2021 00:00 Shentu China  0.2
12 Sep 2021 00:00 Chendai China  0.2
12 Sep 2021 00:00 Hsi-pu China  0.2
12 Sep 2021 00:00 Chihu China  0.2
12 Sep 2021 00:00 Zhangban China  0.2
12 Sep 2021 00:00 Dongyuan China  0.2
12 Sep 2021 00:00 Dongsha China  0.2
12 Sep 2021 00:00 Lingchuan China  0.2
12 Sep 2021 00:00 Huqiu China  0.2
12 Sep 2021 00:00 Wutian China  0.2
12 Sep 2021 00:00 Gulangyu China  0.2
12 Sep 2021 00:00 Chen-hai China  0.2
12 Sep 2021 00:00 Yongning China  0.2
12 Sep 2021 00:00 Daomei China  0.2
12 Sep 2021 00:00 Zhenhai China  0.2
12 Sep 2021 00:00 Songyu China  0.2
12 Sep 2021 00:00 Chongwu China  0.2
12 Sep 2021 00:00 Shih-shih China  0.2
12 Sep 2021 00:00 Hsiang-chih China  0.2
12 Sep 2021 00:00 Hsia-mei China  0.1
12 Sep 2021 00:00 Gongqiancun China  0.1
12 Sep 2021 00:00 Fotan China  0.1
12 Sep 2021 00:00 Fugong China  0.1
12 Sep 2021 00:00 Gangwei China  0.1
12 Sep 2021 00:00 Xucuo China  0.1
12 Sep 2021 00:00 Shenao China  0.1
12 Sep 2021 00:00 Chencheng China  0.1
12 Sep 2021 00:00 Xiamen China  0.1
12 Sep 2021 00:00 Yang-chai Taiwan  0.1
12 Sep 2021 00:00 Weitou China  0.1
12 Sep 2021 00:00 Qian'an China  0.1
12 Sep 2021 00:00 Huanglong China  0.1
12 Sep 2021 00:00 An-ting Taiwan  0.1
12 Sep 2021 00:00 Chin-men Taiwan  0.1
12 Sep 2021 00:00 Chin-men Tao Taiwan  0.1
12 Sep 2021 00:00 Chin-ching China  0.1
12 Sep 2021 00:00 Wangchuan China  0.1
12 Sep 2021 00:00 Dawu China  0.1
12 Sep 2021 00:00 Fengwei China  0.1
12 Sep 2021 00:00 Hsiao-tso China  0.1
12 Sep 2021 00:00 Shihu China  0.1
12 Sep 2021 00:00 Daitou China  0.1
10 Sep 2021 16:00 San Dionisio Philippines  0.1
12 Sep 2021 00:00 Chengguanzhen China  0.1
12 Sep 2021 00:00 Zhelin China  0.1
12 Sep 2021 00:00 Gongkou China  0.1
12 Sep 2021 00:00 Dongshan China  0.1
12 Sep 2021 00:00 Jiangtou China  0.1
12 Sep 2021 00:00 Hecuo China  0.1
12 Sep 2021 00:00 Zhongmen China  0.1
12 Sep 2021 00:00 P'u-hsi China  0.1
12 Sep 2021 00:00 Meizhou China  0.1
12 Sep 2021 00:00 Baisheng China  0.1
12 Sep 2021 00:00 Dianqian China  0.1
12 Sep 2021 00:00 Cao Yu China  0.1
12 Sep 2021 00:00 Beicuo China  0.1
12 Sep 2021 00:00 Hanjiang China  0.1
12 Sep 2021 00:00 Chiang-k'ou China  0.1
12 Sep 2021 00:00 Jiuzhen China  0.1
12 Sep 2021 00:00 Huanggang China  0.1
12 Sep 2021 00:00 Houzhai China  0.1
12 Sep 2021 00:00 Aotou China  0.1
12 Sep 2021 00:00 Ch'ing-hsu Taiwan  0.1
12 Sep 2021 00:00 Tung-shih China  0.1
12 Sep 2021 00:00 Yakou China  0.1
12 Sep 2021 00:00 P'u-hsi-ch'eng China  0.1
12 Sep 2021 00:00 Daitou China  0.1
12 Sep 2021 00:00 Chiang-t'ien China  0.1
12 Sep 2021 00:00 Jinghai China  0.1
11 Sep 2021 22:00 Tung-chiang Taiwan  0.1
11 Sep 2021 22:00 T'ien-ch'ien-ts'o Taiwan  0.1
11 Sep 2021 22:00 Wu-lung Taiwan  0.1
10 Sep 2021 18:00 Banua Philippines  0.1
10 Sep 2021 18:00 Rarasi Philippines  0.1
10 Sep 2021 22:00 Raile Philippines  0.1
10 Sep 2021 22:00 Itbayat Philippines  0.1
10 Sep 2021 22:00 Santa Lucia Philippines  0.1
12 Sep 2021 00:00 Raoping China  0.1
12 Sep 2021 00:00 Nanao China  0.1
12 Sep 2021 00:00 Chelim China  0.1
12 Sep 2021 00:00 Liuwudian China  0.1
12 Sep 2021 00:00 Lianhe China  0.1
12 Sep 2021 00:00 Sidu China  0.1
12 Sep 2021 00:00 Ssu-tu China  0.1
12 Sep 2021 00:00 Shijing China  0.1
12 Sep 2021 00:00 Pinghai China  0.1
12 Sep 2021 00:00 Wuhang China  0.1
12 Sep 2021 00:00 Xindian China  0.1
12 Sep 2021 00:00 Nanri China  0.1
12 Sep 2021 00:00 Fuye China  0.1
12 Sep 2021 00:00 Tung-tai China  0.1
12 Sep 2021 00:00 Guanban China  0.1
12 Sep 2021 00:00 Guangao China  0.1
12 Sep 2021 00:00 Shicheng China  0.1
12 Sep 2021 00:00 Tangbian China  0.1