Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China
20 Jul 2021 12 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, China
Exposed population No people in Category 1 or higher
Maximum wind speed 119 km/h
Maximum storm surge 1.2 m (20 Jul 12:15 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 119 km/h 1.2 m 187 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



Wind exposed population - AoIs

Estimations based on the bulletin of 20 Jul 2021 12:00 UTC
CategoryCountryPopulation 
Tropical StormTaiwan, China2,059,262
+
Taiwan741,579 
China1,317,682 

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 -
- - - - - Taiwan, China
Download:





Impact estimation for the next 72h
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Rainfall

795 mm

Up to 14.2 million can be affected by rain higher than 100mm (see SSHS)





Rain exposed population - AoIs

Estimations based on the bulletin of 20 Jul 2021 12:00 UTC
LevelCountryPopulation 
250-500 mmChina7,769 
100-250 mmChina, Vietnam, Laos, Philippines14,200,197
+
China7,098,381 
Vietnam964 
Laos606,794 
Philippines6,494,056 
50-100 mmChina, Taiwan, Vietnam, Laos, Philippines, Thailand, Cambodia45,532,276
+
China27,217,178 
Taiwan392 
Vietnam9,234,403 
Laos2,190,573 
Philippines4,865,680 
Thailand1,998,401 
Cambodia25,646 

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 12:00 288 14.2 million
- - - China, Taiwan, Vietnam, Laos, Philippines, Thailand, Cambodia




Impact estimation for the next 72h
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StormSurge

1.2 m

The maximum Storm surge height is  1.2m in Beidou, China. This height is estimated for 20 Jul 2021 12:15 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 20 Jul 2021 12:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
20 Jul 2021 12:15 Beidou China  1.2
20 Jul 2021 12:15 Chen-hai China  1.2
20 Jul 2021 12:15 Shen-ching China  1.2
20 Jul 2021 12:00 Luewei China  0.8
20 Jul 2021 12:00 Shalan China  0.7
20 Jul 2021 13:00 Jiangcheng China  0.6
20 Jul 2021 13:00 Baipu China  0.6
20 Jul 2021 13:00 Dagou China  0.6
20 Jul 2021 13:00 Hsin-chou China  0.6
20 Jul 2021 12:15 Pinggang China  0.6
20 Jul 2021 12:15 Shadi China  0.5
20 Jul 2021 12:15 Dalangwan China  0.5
20 Jul 2021 12:00 Dayang China  0.5
20 Jul 2021 12:00 Guanghai China  0.5
22 Jul 2021 13:15 San Shah China  0.4
22 Jul 2021 13:15 Gaoshan China  0.4
22 Jul 2021 13:15 Ta-ch'iu China  0.4
22 Jul 2021 13:15 Beicuo China  0.4
22 Jul 2021 13:15 Guanjing China  0.4
22 Jul 2021 13:15 Cao Yu China  0.4
22 Jul 2021 13:15 Qingfeng China  0.4
22 Jul 2021 13:15 Pingtan China  0.4
20 Jul 2021 12:00 Tiantou China  0.4
20 Jul 2021 12:00 Tonggu China  0.4
20 Jul 2021 12:00 Doushan China  0.4
20 Jul 2021 12:00 Chixi China  0.4
20 Jul 2021 12:00 Huangchong China  0.3
20 Jul 2021 12:00 Meige China  0.3
20 Jul 2021 12:00 Mashan China  0.3
20 Jul 2021 12:00 Mei-ko China  0.3
20 Jul 2021 12:00 Pingsha China  0.3
20 Jul 2021 12:00 Doumen China  0.3
20 Jul 2021 12:15 Lengzilin China  0.3
20 Jul 2021 12:00 Ching-an China  0.3
20 Jul 2021 12:00 Xiaolin China  0.3
20 Jul 2021 12:15 Santouzui China  0.2
20 Jul 2021 12:15 Hsi-t'ou China  0.2
20 Jul 2021 13:15 Yuen Long Hong Kong (China)  0.2
20 Jul 2021 13:15 Tai Po Hong Kong (China)  0.2
20 Jul 2021 13:15 Tai Po Industrial Estate Hong Kong (China)  0.2
20 Jul 2021 13:15 Fung Yuen Hong Kong (China)  0.2
20 Jul 2021 13:15 Dabu Hong Kong (China)  0.2
20 Jul 2021 13:15 Sha Tau Kok China  0.2
20 Jul 2021 13:15 Cheung Kang Hong Kong (China)  0.2
20 Jul 2021 13:15 Imtin China  0.2
20 Jul 2021 13:15 Cheung Wo Hong Kong (China)  0.2
20 Jul 2021 13:15 Pak Sha Au Hong Kong (China)  0.2
20 Jul 2021 13:15 Long Ke Hong Kong (China)  0.2
20 Jul 2021 13:15 Khitschhung China  0.2
22 Jul 2021 13:45 Houtian China  0.2
20 Jul 2021 13:15 Cheung Sha Wan Hong Kong (China)  0.2
20 Jul 2021 13:15 Tsz Wa Chan Hong Kong (China)  0.2
20 Jul 2021 13:15 Yau Ma Po Hong Kong (China)  0.2
20 Jul 2021 13:15 Sai Kung Hong Kong (China)  0.2
20 Jul 2021 14:15 Nanping China  0.2
20 Jul 2021 14:15 Cuihengcun China  0.2
20 Jul 2021 14:15 Xiazha China  0.2
20 Jul 2021 14:15 Maogang China  0.2
20 Jul 2021 14:15 Macau Macau (China)  0.2
20 Jul 2021 14:15 Qishan China  0.2
20 Jul 2021 14:15 Heung chau China  0.2
20 Jul 2021 14:15 Ch'i-ao China  0.2
20 Jul 2021 15:45 Taipa Macau (China)  0.2
20 Jul 2021 15:45 Coloane Macau (China)  0.2
20 Jul 2021 12:00 Min-chung China  0.2
20 Jul 2021 12:00 Wan-ch'ing-sha China  0.2
20 Jul 2021 12:00 Cheng'anwei China  0.2
20 Jul 2021 13:45 Fan Kwai Tong Hong Kong (China)  0.2
20 Jul 2021 13:45 Nantou China  0.2
20 Jul 2021 12:00 Heping China  0.2
20 Jul 2021 12:30 Baijiao China  0.2
20 Jul 2021 12:30 San-tsao China  0.2
23 Jul 2021 00:15 Bailong China  0.2
23 Jul 2021 00:15 Beimu China  0.2
23 Jul 2021 00:15 Yong'an China  0.2
23 Jul 2021 00:15 Shankou China  0.2
20 Jul 2021 13:30 Dapeng China  0.2
20 Jul 2021 13:30 Taipang China  0.2
20 Jul 2021 13:30 Shagang China  0.2
23 Jul 2021 00:00 Yingluo China  0.2
20 Jul 2021 13:15 Aotou China  0.2
20 Jul 2021 14:00 Chiu-chieh China  0.2
20 Jul 2021 14:00 Shekou China  0.2
20 Jul 2021 14:00 Lau Fau Sha Hong Kong (China)  0.2
20 Jul 2021 14:00 Ngau Kwu Long Hong Kong (China)  0.2
20 Jul 2021 14:00 Castle Peak New Town Hong Kong (China)  0.2
20 Jul 2021 14:00 Tuen Mun Hong Kong (China)  0.2
20 Jul 2021 13:45 Tai Long Wan Hong Kong (China)  0.2
20 Jul 2021 16:30 Huangge China  0.2
20 Jul 2021 16:30 Jiang'ouwei China  0.2
20 Jul 2021 16:30 Fumunchai China  0.2
20 Jul 2021 16:30 Fumuntschai China  0.2
20 Jul 2021 16:30 Baihao China  0.2
20 Jul 2021 16:30 Taiping China  0.2
20 Jul 2021 16:30 Sha-ching China  0.2
20 Jul 2021 14:00 Ham Tin Hong Kong (China)  0.2
20 Jul 2021 13:30 Lajiwei China  0.2
20 Jul 2021 13:15 Luzui China  0.2
23 Jul 2021 00:00 Caotan China  0.2
20 Jul 2021 13:45 Yuen Long Hong Kong (China)  0.2
20 Jul 2021 13:45 Sz Pak Hong Kong (China)  0.2
22 Jul 2021 23:45 Longtousha China  0.2
22 Jul 2021 23:00 Ch'i-shui China  0.2
22 Jul 2021 23:00 Haikang China  0.2
20 Jul 2021 15:00 Shangyang China  0.2
22 Jul 2021 22:45 Liu-sha-ying China  0.1
22 Jul 2021 00:30 Yingzai China  0.1
22 Jul 2021 22:45 Shuiwei China  0.1
22 Jul 2021 22:45 Liusha China  0.1
22 Jul 2021 22:45 Mai-ch'en-hsu China  0.1
22 Jul 2021 14:15 Taiping China  0.1
22 Jul 2021 14:15 Xianmai China  0.1
22 Jul 2021 14:15 Longshe China  0.1
22 Jul 2021 14:15 Dongli China  0.1
22 Jul 2021 23:30 Gaode China  0.1
22 Jul 2021 23:30 Guchengling China  0.1
22 Jul 2021 14:15 Dongshan China  0.1
22 Jul 2021 23:30 Beihai China  0.1
22 Jul 2021 23:00 Maichen China  0.1
22 Jul 2021 14:30 Tung-li China  0.1
20 Jul 2021 18:00 Chengcun China  0.1
22 Jul 2021 11:15 Zhanjiang China  0.1
22 Jul 2021 11:15 Ma-hsieh China  0.1
22 Jul 2021 11:15 Dongjian China  0.1
22 Jul 2021 11:15 Badongxu China  0.1
22 Jul 2021 11:15 Houhu China  0.1
22 Jul 2021 11:15 Bengtang China  0.1
22 Jul 2021 11:15 Houhai China  0.1
22 Jul 2021 11:15 Baisha China  0.1
22 Jul 2021 11:15 Shaoyao China  0.1
22 Jul 2021 11:15 Xingyou China  0.1
22 Jul 2021 11:15 Huangwu China  0.1
22 Jul 2021 11:15 Doulongcun China  0.1
20 Jul 2021 15:30 Wanshan China  0.1
20 Jul 2021 16:00 Nam Wan Hong Kong (China)  0.1
20 Jul 2021 16:00 Hoi Pa Hong Kong (China)  0.1
20 Jul 2021 16:00 Lo Tik Wan Hong Kong (China)  0.1
20 Jul 2021 16:00 Tsuen Wan Hong Kong (China)  0.1
20 Jul 2021 16:00 Lo So Shing Hong Kong (China)  0.1
20 Jul 2021 16:00 Ha Kwai Chung Hong Kong (China)  0.1
20 Jul 2021 16:00 Pok Fu Lam Hong Kong (China)  0.1
20 Jul 2021 16:00 Wa Fu Estate Hong Kong (China)  0.1
20 Jul 2021 16:00 Kennedy Town Hong Kong (China)  0.1
20 Jul 2021 16:00 Aberdeen Hong Kong (China)  0.1
20 Jul 2021 16:00 Won Hang Hong Kong (China)  0.1
20 Jul 2021 16:00 Tain Sha Tsui Hong Kong (China)  0.1
20 Jul 2021 16:00 Central Hong Kong (China)  0.1
20 Jul 2021 16:00 Kowloon Hong Kong (China)  0.1
20 Jul 2021 16:00 Wan Chai Hong Kong (China)  0.1
20 Jul 2021 16:00 Chung Hom Kok Hong Kong (China)  0.1
20 Jul 2021 16:00 North Point Hong Kong (China)  0.1
20 Jul 2021 16:00 Chek Chue Hong Kong (China)  0.1
20 Jul 2021 16:00 Crocodile Hill Hong Kong (China)  0.1
20 Jul 2021 14:45 Pucheng China  0.1
20 Jul 2021 14:45 Sha-fan-chieh China  0.1
20 Jul 2021 14:45 Jinxiang China  0.1
21 Jul 2021 09:00 Potou China  0.1
21 Jul 2021 09:00 Huangpo China  0.1
21 Jul 2021 09:00 Chiu-wu-ch'uan China  0.1
22 Jul 2021 23:15 Qiaotou China  0.1
23 Jul 2021 11:45 Raoping China  0.1
23 Jul 2021 11:45 Zhelin China  0.1
23 Jul 2021 11:45 Shenao China  0.1
23 Jul 2021 11:45 Nanao China  0.1
23 Jul 2021 11:45 Chelim China  0.1
23 Jul 2021 11:45 Gongkou China  0.1
23 Jul 2021 11:45 Dongshan China  0.1
20 Jul 2021 18:15 Hsia-yung China  0.1
20 Jul 2021 18:15 Renshan China  0.1
20 Jul 2021 18:15 Jen-shan China  0.1
20 Jul 2021 18:15 Fanhe China  0.1
20 Jul 2021 18:15 Pinghai China  0.1
23 Jul 2021 10:15 Chu-kao-wan Taiwan  0.1
23 Jul 2021 10:15 Feng-kuei-li Taiwan  0.1
23 Jul 2021 10:15 Ch'ang-an Taiwan  0.1
23 Jul 2021 10:15 P'eng-hu-erh-ts'un Taiwan  0.1
23 Jul 2021 10:15 Ma-kung Taiwan  0.1
23 Jul 2021 10:15 Ch'eng-ch'ien Taiwan  0.1
23 Jul 2021 10:15 Chu-mu-shui Taiwan  0.1
23 Jul 2021 10:15 Chi-pei Taiwan  0.1
23 Jul 2021 10:15 Lung-men Taiwan  0.1
23 Jul 2021 06:15 Sha-shan Taiwan  0.1
23 Jul 2021 06:15 Wang-kung Taiwan  0.1
23 Jul 2021 06:15 Lu-kang Taiwan  0.1
22 Jul 2021 09:45 Meilu China  0.1
22 Jul 2021 09:45 Hai-lu China  0.1
22 Jul 2021 22:30 Xinxing China  0.1
22 Jul 2021 23:15 Xiuying China  0.1
20 Jul 2021 20:00 Tai Tam Hong Kong (China)  0.1
20 Jul 2021 20:00 Stanley Hong Kong (China)  0.1
20 Jul 2021 20:00 San Wan Ho Shau Hong Kong (China)  0.1
20 Jul 2021 20:00 Yau Tong Hong Kong (China)  0.1
20 Jul 2021 20:00 Rennie's Mill Hong Kong (China)  0.1
20 Jul 2021 20:00 A Kung Ngam Hong Kong (China)  0.1
20 Jul 2021 20:00 Chai Wan Hong Kong (China)  0.1
20 Jul 2021 20:00 Sau Mau Ping Hong Kong (China)  0.1
20 Jul 2021 20:00 Hok Tsui Wan Hong Kong (China)  0.1
20 Jul 2021 20:00 Chik Sha Hong Kong (China)  0.1
20 Jul 2021 20:00 Hang Hau Hong Kong (China)  0.1
20 Jul 2021 20:00 Tei Tong Tsui Hong Kong (China)  0.1
20 Jul 2021 20:00 Tai Wan Tau Hong Kong (China)  0.1
22 Jul 2021 10:00 Shuidong China  0.1
22 Jul 2021 10:15 Nayan China  0.1
22 Jul 2021 23:15 Haian China  0.1
22 Jul 2021 10:00 Ch'i-ching China  0.1
22 Jul 2021 10:00 Dianbai China  0.1
22 Jul 2021 10:00 Danchang China  0.1
22 Jul 2021 10:00 Magang China  0.1
23 Jul 2021 06:15 Ching-shui Taiwan  0.1
22 Jul 2021 17:45 Fang-shan Taiwan  0.1
22 Jul 2021 17:45 Feng-chiang Taiwan  0.1
22 Jul 2021 17:45 She-liao Taiwan  0.1
22 Jul 2021 17:45 Che-cheng Taiwan  0.1
22 Jul 2021 17:45 Chia-ho-ts'un Taiwan  0.1
22 Jul 2021 23:00 Haikou China  0.1
22 Jul 2021 17:45 Maobitou Taiwan  0.1
22 Jul 2021 17:45 Ta-kuang Taiwan  0.1
22 Jul 2021 18:15 Liu-chiu Hsu Taiwan  0.1
22 Jul 2021 09:45 Diancheng China  0.1
22 Jul 2021 09:45 Rudong China  0.1
22 Jul 2021 22:30 Guangcun China  0.1
23 Jul 2021 10:00 Wai-an Taiwan  0.1
22 Jul 2021 18:15 T'ien-ch'ien-ts'o Taiwan  0.1
22 Jul 2021 18:15 Shui-ti-liao Taiwan  0.1
22 Jul 2021 23:00 Boshegang China  0.1
23 Jul 2021 09:45 Hua-hsu Taiwan  0.1
23 Jul 2021 11:45 Ta-lin-pu Taiwan  0.1
23 Jul 2021 11:45 Hou-ta-ts'o Taiwan  0.1
23 Jul 2021 11:45 I-jen Taiwan  0.1
23 Jul 2021 11:45 Tung-chiang Taiwan  0.1
23 Jul 2021 11:45 Wu-lung Taiwan  0.1
22 Jul 2021 23:00 Longtang China  0.1
23 Jul 2021 09:45 Chiang-chun-ao Taiwan  0.1
23 Jul 2021 06:30 Chung-ch'i Taiwan  0.1
23 Jul 2021 06:30 San-hsing Taiwan  0.1
23 Jul 2021 06:30 T'ai-hsi Taiwan  0.1
23 Jul 2021 09:00 Shih-shih China  0.1
23 Jul 2021 09:00 Yakou China  0.1
23 Jul 2021 09:00 Yongning China  0.1
23 Jul 2021 09:00 Shihu China  0.1
23 Jul 2021 09:00 Dongyuan China  0.1
23 Jul 2021 09:00 Hsiang-chih China  0.1
23 Jul 2021 09:00 Zhangban China  0.1
23 Jul 2021 09:00 Qian'an China  0.1
23 Jul 2021 09:00 Chongwu China  0.1
23 Jul 2021 12:00 Gongqiancun China  0.1
23 Jul 2021 12:00 Chencheng China  0.1
23 Jul 2021 12:00 Hsi-pu China  0.1
20 Jul 2021 17:15 Houmen China  0.1
21 Jul 2021 22:00 Puqian China  0.1
22 Jul 2021 12:30 Magong China  0.1
22 Jul 2021 12:30 Jizhongtuo China  0.1
22 Jul 2021 12:30 Shanwei China  0.1
22 Jul 2021 12:30 Jiesheng China  0.1
22 Jul 2021 22:30 Eman China  0.1
20 Jul 2021 18:15 Wangchuan China  0.1
20 Jul 2021 18:15 Fengting China  0.1
20 Jul 2021 18:15 Dawu China  0.1
20 Jul 2021 18:15 Fengwei China  0.1
20 Jul 2021 18:15 Hsiao-tso China  0.1
20 Jul 2021 18:15 Zhongmen China  0.1