Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China

Impact

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

Meteorological source GDACS
Glide number: TC-2021-000094-CHN
Exposed countries China
Exposed population 2.2 million in Category 1 or higher
Maximum wind speed 139 km/h
Maximum storm surge n.a.
Vulnerability Medium (China)
Landfall between
20 Jul 2021 06:00 - 20 Jul 2021 12:00

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
GDACS Current 37 km/h 0.0 m n.a. 0.5
GDACS Overall 139 km/h 0.0 m n.a. 1.5

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

Wind

37 km/h Current Max.

Up to 23.1 million people in Tropical Storm 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 2 18 Jul 2021 18:00 102 12.4 million No people China
Green 3 19 Jul 2021 00:00 111 7.1 million No people China
Green 4 19 Jul 2021 06:00 120 14.2 million Few people China
Orange 5 19 Jul 2021 12:00 120 12.4 million 300 thousand China
Orange 6 19 Jul 2021 18:00 120 22.5 million 850 thousand China
Orange 7 20 Jul 2021 00:00 120 78.5 million 860 thousand China
Orange 8 20 Jul 2021 06:00 130 52.4 million 1.4 million China
Orange 9 20 Jul 2021 12:00 139 53.8 million 1.8 million China
Green 10 20 Jul 2021 18:00 102 28.6 million 2.2 million China
Orange 11 21 Jul 2021 00:00 65 44.6 million 2.2 million China
Orange 12 21 Jul 2021 06:00 65 36.9 million 2.2 million China
Green 13 21 Jul 2021 12:00 65 31.5 million 2.2 million China
Green 14 21 Jul 2021 18:00 65 31.2 million 2.2 million China
Green 15 22 Jul 2021 00:00 65 31.3 million 2.2 million China
Green 16 22 Jul 2021 06:00 56 23.2 million 2.2 million China
Green 17 22 Jul 2021 12:00 56 23.2 million 2.2 million China
Green 18 22 Jul 2021 18:00 46 23.2 million 2.2 million China
Green 19 23 Jul 2021 00:00 46 23.2 million 2.2 million China
Green 20 23 Jul 2021 06:00 46 23.2 million 2.2 million China
Green 21 23 Jul 2021 12:00 37 23.2 million 2.2 million China

Bulletin Timeline

Alert Date (UTC) Category Max winds
(km/h)
Population in
Tropical Storm
Population in
Cat.1 or higher
Location (lat, lon) Countries
GREEN
2 18 Jul 2021 18:00 Tropical storm 65 no people no people 20.8, 113.2
GREEN
3 19 Jul 2021 00:00 Tropical storm 83 210000 people no people 20.9, 113.1
GREEN
4 19 Jul 2021 06:00 Tropical storm 93 1.8 million people no people 21, 113
GREEN
5 19 Jul 2021 12:00 Tropical storm 102 1.7 million people <1000 people 21.2, 112.7
GREEN
6 19 Jul 2021 18:00 Category 1 120 1.8 million people <1000 people 21.2, 112.5
ORANGE
7 20 Jul 2021 00:00 Category 1 120 13.4 million people 860000 people 21.3, 112.4
ORANGE
8 20 Jul 2021 06:00 Category 1 130 16.2 million people 1.3 million people 21.4, 112.3
ORANGE
9 20 Jul 2021 12:00 Category 1 139 21.4 million people 1.8 million people 21.7, 112 China
GREEN
10 20 Jul 2021 18:00 Tropical storm 102 11.6 million people no people 21.7, 111.4 China
GREEN
11 21 Jul 2021 00:00 Tropical storm 65 9.2 million people no people 21.9, 110.9 China
GREEN
12 21 Jul 2021 06:00 Tropical depression 46 no people no people 22.1, 110.9 China
GREEN
13 21 Jul 2021 12:00 Tropical depression 46 no people no people 22.5, 110.5 China
GREEN
14 21 Jul 2021 18:00 Tropical depression 46 no people no people 22.8, 109.5 China
GREEN
15 22 Jul 2021 00:00 Tropical depression 46 no people no people 22.6, 109.1 China
GREEN
16 22 Jul 2021 06:00 Tropical depression 46 no people no people 22.6, 108.3 China
GREEN
17 22 Jul 2021 12:00 Tropical depression 46 no people no people 22.1, 107.9 China
GREEN
18 22 Jul 2021 18:00 Tropical depression 46 no people no people 21.4, 107.4 Viet Nam
GREEN
19 23 Jul 2021 00:00 Tropical depression 46 no people no people 20.8, 107.4
GREEN
20 23 Jul 2021 06:00 Tropical depression 46 no people no people 20.7, 107.6
GREEN
21 23 Jul 2021 12:00 Tropical depression 37 no people no people 20, 107.3
GREEN
21 24 Jul 2021 00:00 Tropical depression 37 no people no people 19.1, 107.2
GREEN
21 24 Jul 2021 12:00 Tropical depression 28 no people no people 18.6, 107.9
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
Guangxi China 46.8 million people
Guangdong China 69.6 million people
Macau China 380000 people

Populated places

Name Region Province Country City class Population
Huangpo Guangdong China City -
Meilu Guangdong China City 100000 people
Maoming Guangdong China City 460000 people
Gaozhou Guangdong China City 160000 people
Chuncheng Guangdong China City 150000 people
Jiangcheng Guangdong China City -
Encheng Guangdong China City 110000 people
Xinxing Guangdong China City -
Cangcheng Guangdong China City -
Sihe Guangdong China City -
Taicheng Guangdong China City 140000 people
Zhaoqing Guangdong China City 360000 people
Sanbu Guangdong China City 130000 people
Mingcheng Guangdong China City -
Xincheng Guangdong China City -
Jiangmen Guangdong China City 530000 people
Xiaolan Guangdong China City 180000 people
Sanxiang Guangdong China City -
Zhongshan Guangdong China City 330000 people
Macau Macau SAR Macau (China) 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)
Zhuhai ZUH 6 0
Shanzhou SZO unknown 0
Macau MFM 6 Civ. Paved Yes 11000

Ports

Name LOCODE Country
Shuidong CNSDG China
Yangjiang CNYJI China
Jiangmen CNJMN China

Dams

Reservoir Dam Name River Year
Renshui Luoguang Shui 1975
Gaozhou Dajing He 1959
Huangsha Yanghua Jiang 1960
Fucao Qianpai He 1997
Donghu Nalong He 1961
Jinjiang Tan He 1972
Dalongdong Dalongdong He 1959

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

No locations affected by storm surge > 10 cm

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.