Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China
21 Jul 2021 06 UTC
click on to select bulletin time
Impact Single TC
Impact based on all weather systems in the area

Impact

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

Meteorological source GFS
Exposed countries Taiwan
Exposed population No people in Category 1 or higher
Maximum wind speed 58 km/h
Maximum storm surge 0.2 m (21 Jul 08:45 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
GFS Current 58 km/h 0.2 m 66 mm 0.5
GFS Overall 144 km/h 1.2 m 795 mm 0.5

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

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Wind

144 km/h

Up to 30 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 21 Jul 2021 06:00 UTC
CategoryCountryPopulation 
Tropical StormTaiwan25,705 

See TC classification SSHS


Wind Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert N° Date (UTC) Max Winds (km/h) Pop in Cat. 1 or higher TS Cat. 1 Cat. 2 Cat. 3 Cat. 4 Cat. 5 Countries
GREEN 1 18 Jul 2021 18:00 72 - - - - - - -
GREEN 2 19 Jul 2021 00:00 108 - - - - - - -
GREEN 3 19 Jul 2021 06:00 94 - - - - - - -
GREEN 4 19 Jul 2021 12:00 108 -
- - - - - China
GREEN 5 19 Jul 2021 18:00 112 - - - - - - -
GREEN 6 20 Jul 2021 00:00 144 -
- - - - - China
GREEN 7 20 Jul 2021 06:00 126 -
- - - - - China
GREEN 8 20 Jul 2021 12:00 119 -
- - - - - China
GREEN 9 20 Jul 2021 18:00 65 -
- - - - - China
GREEN 10 21 Jul 2021 00:00 54 - - - - - - -
GREEN 11 21 Jul 2021 06:00 65 -
- - - - - Taiwan
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 21 Jul 2021 06:00 UTC
LevelCountryPopulation 
100-250 mmChina, Vietnam, Laos, Thailand, Philippines14,621,274
+
China1,377,449 
Vietnam4,292,944 
Laos969,191 
Philippines6,439,365 
Thailand1,542,323 
50-100 mmChina, Taiwan, Vietnam, Laos, Philippines, Thailand59,764,366
+
China21,947,991 
Taiwan3,679,873 
Vietnam24,064,268 
Laos1,802,689 
Philippines3,874,552 
Thailand4,394,992 

Rain Impact Timeline

people affected <=10000
10000< people affected <=100000
people affected >100000


Alert N° Date (UTC) Max Rainfall (mm) Pop >100mm or higher 50-100 100-250 250-500 500-750 750-1000 >1000 Countries
Blue 1 18 Jul 2021 18:00 142 80 thousand
- - - - Laos, Vietnam, Cambodia
Blue 2 19 Jul 2021 00:00 171 -
- - - - - Laos, Cambodia
Blue 3 19 Jul 2021 06:00 157 -
- - - - - Hong Kong, China
Blue 4 19 Jul 2021 12:00 126 - - - - - - -
Blue 5 19 Jul 2021 18:00 223 -
- - - - - Laos, Vietnam
Blue 6 20 Jul 2021 00:00 221 Few people
- - - - China, Laos, Thailand
Blue 7 20 Jul 2021 06:00 274 170 thousand
- - - - China
Blue 8 20 Jul 2021 12:00 187 440 thousand
- - - - China
Blue 9 20 Jul 2021 18:00 151 790 thousand
- - - - China
Blue 10 21 Jul 2021 00:00 75 -
- - - - - China
Blue 11 21 Jul 2021 06:00 233 14.6 million
- - - - China, Taiwan, Vietnam, Laos, Philippines, Thailand




Impact estimation for the next 72h
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StormSurge

0.2 m

The maximum Storm surge height is  0.2m in Min-chung, China. This height is estimated for 21 Jul 2021 08:45 UTC .

The JRC has developed an experimental global storm surge model, which is run after each advisory issued by the regional tropical cyclone centres. 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.

Storm Surge Exposed population - AoIs


Storm Surge Exposed locations

Calculation based on the bulletin of 21 Jul 2021 06:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
21 Jul 2021 08:45 Min-chung China  0.2
21 Jul 2021 08:45 Wan-ch'ing-sha China  0.2
21 Jul 2021 08:45 Qishan China  0.2
21 Jul 2021 08:45 Cheng'anwei China  0.2
21 Jul 2021 09:00 Huangge China  0.2
21 Jul 2021 09:00 Jiang'ouwei China  0.2
21 Jul 2021 09:00 Fumunchai China  0.2
21 Jul 2021 09:00 Fumuntschai China  0.2
21 Jul 2021 09:00 Baihao China  0.2
21 Jul 2021 09:00 Taiping China  0.2
21 Jul 2021 09:00 Sha-ching China  0.2
21 Jul 2021 09:00 Heping China  0.2
21 Jul 2021 09:00 Cuihengcun China  0.2
21 Jul 2021 09:00 Ch'i-ao China  0.2
21 Jul 2021 06:00 San Shah China  0.2
21 Jul 2021 06:00 Gaoshan China  0.2
21 Jul 2021 06:00 Ta-ch'iu China  0.2
21 Jul 2021 06:00 Beicuo China  0.2
21 Jul 2021 06:00 Guanjing China  0.2
21 Jul 2021 06:00 Cao Yu China  0.2
21 Jul 2021 06:00 Qingfeng China  0.2
21 Jul 2021 06:00 Pingtan China  0.2
21 Jul 2021 10:45 Xiazha China  0.2
21 Jul 2021 11:00 Nanping China  0.2
21 Jul 2021 11:00 Maogang China  0.2
21 Jul 2021 11:00 Macau Macau (China)  0.2
21 Jul 2021 11:00 Taipa Macau (China)  0.2
21 Jul 2021 11:00 Coloane Macau (China)  0.2
21 Jul 2021 11:00 Heung chau China  0.2
21 Jul 2021 09:15 Nantou China  0.2
21 Jul 2021 12:00 Fan Kwai Tong Hong Kong (China)  0.2
21 Jul 2021 09:30 Baijiao China  0.1
21 Jul 2021 09:30 San-tsao China  0.1
21 Jul 2021 12:00 Chiu-chieh China  0.1
21 Jul 2021 12:00 Shekou China  0.1
21 Jul 2021 12:00 Lajiwei China  0.1
21 Jul 2021 12:00 Castle Peak New Town Hong Kong (China)  0.1
21 Jul 2021 12:00 Tuen Mun Hong Kong (China)  0.1
21 Jul 2021 12:00 Tai Long Wan Hong Kong (China)  0.1
21 Jul 2021 12:00 Lau Fau Sha Hong Kong (China)  0.1
21 Jul 2021 12:00 Ngau Kwu Long Hong Kong (China)  0.1
21 Jul 2021 10:30 Hsia-yung China  0.1
21 Jul 2021 10:30 Renshan China  0.1
21 Jul 2021 10:30 Jen-shan China  0.1
21 Jul 2021 10:30 Fanhe China  0.1
21 Jul 2021 10:30 Pinghai China  0.1
21 Jul 2021 12:00 Ham Tin Hong Kong (China)  0.1
21 Jul 2021 12:00 Beidou China  0.1
21 Jul 2021 12:00 Chen-hai China  0.1
21 Jul 2021 12:00 Shen-ching China  0.1
21 Jul 2021 11:45 Yuen Long Hong Kong (China)  0.1
21 Jul 2021 11:45 Sz Pak Hong Kong (China)  0.1
21 Jul 2021 11:00 Dapeng China  0.1
21 Jul 2021 11:00 Taipang China  0.1
21 Jul 2021 11:00 Aotou China  0.1
21 Jul 2021 11:00 Luzui China  0.1
21 Jul 2021 06:00 Chixi China  0.1
21 Jul 2021 06:00 Huangchong China  0.1
21 Jul 2021 06:00 Meige China  0.1
21 Jul 2021 06:00 Mashan China  0.1
21 Jul 2021 06:00 Mei-ko China  0.1
21 Jul 2021 06:00 Pingsha China  0.1
21 Jul 2021 06:00 Doumen China  0.1
21 Jul 2021 10:15 Tiantou China  0.1
21 Jul 2021 10:15 Tonggu China  0.1
21 Jul 2021 06:00 Ching-an China  0.1
21 Jul 2021 06:00 Xiaolin China  0.1
21 Jul 2021 10:15 Shagang China  0.1
21 Jul 2021 12:00 Luewei China  0.1
21 Jul 2021 12:00 Shalan China  0.1
21 Jul 2021 07:45 Ma-hsieh China  0.1
21 Jul 2021 07:45 Badongxu China  0.1
21 Jul 2021 07:45 Potou China  0.1
21 Jul 2021 07:45 Bengtang China  0.1
21 Jul 2021 07:45 Baisha China  0.1
21 Jul 2021 07:45 Shaoyao China  0.1
21 Jul 2021 07:45 Xingyou China  0.1
21 Jul 2021 07:45 Huangpo China  0.1
21 Jul 2021 07:45 Chiu-wu-ch'uan China  0.1
21 Jul 2021 11:45 Hsin-chou China  0.1
21 Jul 2021 11:15 Yuen Long Hong Kong (China)  0.1
21 Jul 2021 11:15 Tai Po Hong Kong (China)  0.1
21 Jul 2021 11:15 Tai Po Industrial Estate Hong Kong (China)  0.1
21 Jul 2021 11:15 Fung Yuen Hong Kong (China)  0.1
21 Jul 2021 11:15 Dabu Hong Kong (China)  0.1
21 Jul 2021 11:15 Sha Tau Kok China  0.1
21 Jul 2021 11:15 Cheung Kang Hong Kong (China)  0.1
21 Jul 2021 11:15 Imtin China  0.1
21 Jul 2021 11:15 Cheung Wo Hong Kong (China)  0.1
21 Jul 2021 11:15 Pak Sha Au Hong Kong (China)  0.1
21 Jul 2021 11:15 Long Ke Hong Kong (China)  0.1
21 Jul 2021 11:15 Khitschhung China  0.1
21 Jul 2021 11:15 Cheung Sha Wan Hong Kong (China)  0.1
21 Jul 2021 11:15 Tsz Wa Chan Hong Kong (China)  0.1
21 Jul 2021 11:15 Yau Ma Po Hong Kong (China)  0.1
21 Jul 2021 11:15 Sai Kung Hong Kong (China)  0.1
21 Jul 2021 12:00 Dagou China  0.1
21 Jul 2021 09:30 Houmen China  0.1
21 Jul 2021 11:00 Wanshan China  0.1