Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China
20 Jul 2021 18 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 65 km/h
Maximum storm surge 0.4 m (22 Jul 13:45 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 65 km/h 0.4 m 151 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 880 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 20 Jul 2021 18:00 UTC
CategoryCountryPopulation 
Tropical StormTaiwan, China878,066
+
Taiwan856,328 
China21,737 

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 72 -
- - - - - Taiwan, China
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 20 Jul 2021 18:00 UTC
LevelCountryPopulation 
250-500 mmChina181,298 
100-250 mmChina, Vietnam, Laos, Philippines, Thailand18,002,068
+
China10,862,565 
Vietnam963 
Laos1,047,807 
Philippines6,089,457 
Thailand1,274 
50-100 mmChina, Taiwan, Vietnam, Laos, Philippines, Thailand, Cambodia40,845,742
+
China17,430,899 
Taiwan2,891,206 
Vietnam10,790,975 
Laos1,586,335 
Philippines5,283,788 
Thailand2,805,789 
Cambodia56,745 

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 18:00 278 18.2 million
- - - China, Taiwan, Vietnam, Laos, Philippines, Thailand, Cambodia




Impact estimation for the next 72h
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StormSurge

0.4 m

The maximum Storm surge height is  0.4m in San Shah, China. This height is estimated for 22 Jul 2021 13:45 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 20 Jul 2021 18:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
22 Jul 2021 13:45 San Shah China  0.4
22 Jul 2021 13:45 Gaoshan China  0.4
22 Jul 2021 13:45 Ta-ch'iu China  0.4
22 Jul 2021 13:45 Beicuo China  0.4
22 Jul 2021 13:45 Guanjing China  0.4
22 Jul 2021 13:45 Cao Yu China  0.4
22 Jul 2021 13:45 Qingfeng China  0.4
22 Jul 2021 13:45 Pingtan China  0.4
20 Jul 2021 23:15 Beidou China  0.3
20 Jul 2021 23:15 Chen-hai China  0.3
20 Jul 2021 23:15 Shen-ching China  0.3
23 Jul 2021 01:00 Bailong China  0.2
23 Jul 2021 01:00 Beimu China  0.2
23 Jul 2021 01:00 Yong'an China  0.2
23 Jul 2021 01:00 Shankou China  0.2
23 Jul 2021 01:00 Yingluo China  0.2
23 Jul 2021 11:15 Houtian China  0.2
22 Jul 2021 01:45 Caotan China  0.2
22 Jul 2021 01:45 Longtousha China  0.2
22 Jul 2021 01:45 Yingzai China  0.2
20 Jul 2021 21:30 Luewei China  0.2
20 Jul 2021 21:30 Shalan China  0.2
20 Jul 2021 21:30 Shadi China  0.2
20 Jul 2021 21:30 Dalangwan China  0.2
22 Jul 2021 23:30 Ch'i-shui China  0.2
22 Jul 2021 23:30 Haikang China  0.2
20 Jul 2021 18:00 Cuihengcun China  0.2
20 Jul 2021 18:00 Min-chung China  0.2
20 Jul 2021 18:00 Wan-ch'ing-sha China  0.2
20 Jul 2021 18:00 Qishan China  0.2
20 Jul 2021 18:00 Cheng'anwei China  0.2
20 Jul 2021 18:00 Ch'i-ao China  0.2
20 Jul 2021 19:45 Xiazha China  0.2
22 Jul 2021 23:15 Liu-sha-ying China  0.2
22 Jul 2021 23:15 Shuiwei China  0.2
22 Jul 2021 23:15 Liusha China  0.2
22 Jul 2021 23:15 Mai-ch'en-hsu China  0.2
20 Jul 2021 18:00 Heping 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
23 Jul 2021 00:15 Gaode China  0.2
23 Jul 2021 00:15 Guchengling China  0.2
23 Jul 2021 00:15 Beihai China  0.2
22 Jul 2021 23:15 Maichen China  0.2
20 Jul 2021 18:15 Nantou China  0.2
21 Jul 2021 09:00 Ma-hsieh China  0.2
21 Jul 2021 09:00 Badongxu China  0.2
21 Jul 2021 09:00 Potou China  0.2
21 Jul 2021 09:00 Bengtang China  0.2
21 Jul 2021 09:00 Baisha China  0.2
21 Jul 2021 09:00 Shaoyao China  0.2
21 Jul 2021 09:00 Xingyou China  0.2
21 Jul 2021 09:00 Huangpo China  0.2
21 Jul 2021 09:00 Chiu-wu-ch'uan China  0.2
22 Jul 2021 23:15 Qiaotou China  0.2
21 Jul 2021 12:45 Nanping China  0.2
21 Jul 2021 12:45 Maogang China  0.2
21 Jul 2021 12:45 Macau Macau (China)  0.2
21 Jul 2021 12:45 Heung chau China  0.2
20 Jul 2021 22:45 Taipa Macau (China)  0.2
20 Jul 2021 22:45 Coloane Macau (China)  0.2
23 Jul 2021 06:30 Sha-shan Taiwan  0.2
23 Jul 2021 06:30 Wang-kung Taiwan  0.2
23 Jul 2021 06:30 Lu-kang Taiwan  0.2
21 Jul 2021 12:45 Fan Kwai Tong Hong Kong (China)  0.2
22 Jul 2021 23:15 Xinxing China  0.2
20 Jul 2021 18:00 Chiu-chieh China  0.2
20 Jul 2021 18:00 Shekou China  0.2
23 Jul 2021 06:45 Ching-shui Taiwan  0.2
20 Jul 2021 23:00 Baijiao China  0.2
20 Jul 2021 23:00 San-tsao China  0.2
21 Jul 2021 02:15 Dayang China  0.2
21 Jul 2021 02:15 Guanghai China  0.2
21 Jul 2021 02:15 Doushan China  0.2
21 Jul 2021 02:15 Tiantou China  0.2
21 Jul 2021 02:15 Tonggu China  0.2
21 Jul 2021 02:15 Chixi China  0.2
22 Jul 2021 23:15 Xiuying China  0.2
22 Jul 2021 23:30 Guangcun China  0.2
20 Jul 2021 19:15 Castle Peak New Town Hong Kong (China)  0.2
20 Jul 2021 19:15 Tuen Mun Hong Kong (China)  0.2
20 Jul 2021 18:00 Huangchong China  0.1
20 Jul 2021 18:00 Meige China  0.1
20 Jul 2021 18:00 Mashan China  0.1
20 Jul 2021 18:00 Mei-ko China  0.1
20 Jul 2021 18:00 Pingsha China  0.1
20 Jul 2021 18:00 Doumen China  0.1
20 Jul 2021 18:00 Ching-an China  0.1
20 Jul 2021 18:00 Xiaolin China  0.1
20 Jul 2021 20:30 Dagou China  0.1
20 Jul 2021 20:30 Hsin-chou China  0.1
22 Jul 2021 23:15 Haian China  0.1
20 Jul 2021 21:00 Yuen Long Hong Kong (China)  0.1
20 Jul 2021 21:00 Tai Po Hong Kong (China)  0.1
20 Jul 2021 21:00 Tai Po Industrial Estate Hong Kong (China)  0.1
20 Jul 2021 21:00 Fung Yuen Hong Kong (China)  0.1
20 Jul 2021 21:00 Dabu Hong Kong (China)  0.1
20 Jul 2021 21:00 Sha Tau Kok China  0.1
20 Jul 2021 21:00 Cheung Kang Hong Kong (China)  0.1
20 Jul 2021 21:00 Imtin China  0.1
20 Jul 2021 21:00 Cheung Wo Hong Kong (China)  0.1
20 Jul 2021 21:00 Pak Sha Au Hong Kong (China)  0.1
20 Jul 2021 21:00 Long Ke Hong Kong (China)  0.1
20 Jul 2021 21:00 Khitschhung China  0.1
20 Jul 2021 20:45 Cheung Sha Wan Hong Kong (China)  0.1
20 Jul 2021 20:45 Tsz Wa Chan Hong Kong (China)  0.1
20 Jul 2021 20:45 Yau Ma Po Hong Kong (China)  0.1
20 Jul 2021 20:45 Sai Kung Hong Kong (China)  0.1
21 Jul 2021 12:00 Lajiwei China  0.1
22 Jul 2021 23:15 Haikou 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
23 Jul 2021 08:30 Wangchuan China  0.1
23 Jul 2021 08:30 Fengting China  0.1
23 Jul 2021 08:30 Dawu China  0.1
23 Jul 2021 08:30 Fengwei China  0.1
23 Jul 2021 08:30 Hsiao-tso China  0.1
23 Jul 2021 08:30 Zhongmen China  0.1
21 Jul 2021 12:15 Ngau Kwu Long Hong Kong (China)  0.1
23 Jul 2021 06:45 Hai huang Taiwan  0.1
23 Jul 2021 06:45 Yuan-li Taiwan  0.1
23 Jul 2021 06:45 Tung-hsiao Taiwan  0.1
22 Jul 2021 23:00 Eman China  0.1
23 Jul 2021 06:45 Ch'i-ting Taiwan  0.1
22 Jul 2021 23:15 Boshegang China  0.1
20 Jul 2021 20:45 Jiangcheng China  0.1
20 Jul 2021 20:45 Baipu China  0.1
22 Jul 2021 23:15 Paipu China  0.1
22 Jul 2021 23:15 Baimajing China  0.1
22 Jul 2021 23:15 Hsin-ying China  0.1
22 Jul 2021 23:15 Taan China  0.1
22 Jul 2021 23:15 Hsin-chou China  0.1
21 Jul 2021 12:00 Ham Tin Hong Kong (China)  0.1
23 Jul 2021 08:00 Chu-kao-wan Taiwan  0.1
23 Jul 2021 08:00 Feng-kuei-li Taiwan  0.1
23 Jul 2021 08:00 Ch'ang-an Taiwan  0.1
23 Jul 2021 08:00 P'eng-hu-erh-ts'un Taiwan  0.1
23 Jul 2021 08:00 Ma-kung Taiwan  0.1
23 Jul 2021 08:00 Ch'eng-ch'ien Taiwan  0.1
23 Jul 2021 08:00 Chu-mu-shui Taiwan  0.1
23 Jul 2021 08:00 Chi-pei Taiwan  0.1
23 Jul 2021 08:00 Lung-men Taiwan  0.1
23 Jul 2021 06:15 Chung-ch'i Taiwan  0.1
23 Jul 2021 06:15 San-hsing Taiwan  0.1
23 Jul 2021 06:15 T'ai-hsi Taiwan  0.1
20 Jul 2021 18:00 Chengcun China  0.1
20 Jul 2021 18:00 Santouzui China  0.1
20 Jul 2021 18:00 Hsi-t'ou China  0.1
20 Jul 2021 18:00 Lengzilin China  0.1
20 Jul 2021 18:00 Pinggang China  0.1
20 Jul 2021 21:00 Dapeng China  0.1
20 Jul 2021 21:00 Taipang China  0.1
20 Jul 2021 21:00 Shagang China  0.1
22 Jul 2021 23:15 Longtang China  0.1
21 Jul 2021 02:45 Shuidong China  0.1
21 Jul 2021 02:45 Ch'i-ching China  0.1
21 Jul 2021 02:45 Dianbai China  0.1
21 Jul 2021 02:45 Danchang China  0.1
21 Jul 2021 02:45 Magang China  0.1
20 Jul 2021 20:15 Aotou China  0.1
20 Jul 2021 20:15 Luzui China  0.1
23 Jul 2021 08:00 Wai-an Taiwan  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 01:00 Diancheng China  0.1
21 Jul 2021 01:00 Rudong 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
22 Jul 2021 23:30 Puqian China  0.1
21 Jul 2021 17:30 Taiping China  0.1
21 Jul 2021 17:30 Longshe China  0.1
21 Jul 2021 17:30 Dongshan China  0.1
23 Jul 2021 16:45 Liu-chiu Hsu Taiwan  0.1
23 Jul 2021 16:45 Chia-ho-ts'un Taiwan  0.1
23 Jul 2021 16:45 Fang-shan Taiwan  0.1
23 Jul 2021 16:45 Feng-chiang Taiwan  0.1
23 Jul 2021 16:45 She-liao Taiwan  0.1
23 Jul 2021 16:45 Che-cheng Taiwan  0.1
21 Jul 2021 17:45 Xianmai China  0.1
21 Jul 2021 17:45 Dongli China  0.1
21 Jul 2021 17:45 Tung-li China  0.1
23 Jul 2021 08:15 Hua-hsu Taiwan  0.1
23 Jul 2021 16:00 Maobitou Taiwan  0.1
23 Jul 2021 16:00 Ta-kuang Taiwan  0.1
23 Jul 2021 07:45 P'u-hsi China  0.1
23 Jul 2021 07:45 P'u-hsi-ch'eng China  0.1
23 Jul 2021 07:45 Meizhou China  0.1
22 Jul 2021 23:45 Hsi-ch'ang-hsu China  0.1
22 Jul 2021 23:45 Hsi-ch'ang China  0.1
22 Jul 2021 23:45 Dangjiang China  0.1
22 Jul 2021 23:45 Qianjiang China  0.1
21 Jul 2021 23:15 Shagang China  0.1
23 Jul 2021 16:45 T'ien-ch'ien-ts'o Taiwan  0.1
23 Jul 2021 14:15 Shui-ti-liao Taiwan  0.1
23 Jul 2021 08:00 Chiang-chun-ao Taiwan  0.1
23 Jul 2021 16:45 Hou-ta-ts'o Taiwan  0.1
23 Jul 2021 16:45 Tung-chiang Taiwan  0.1
23 Jul 2021 16:45 Wu-lung Taiwan  0.1
23 Jul 2021 07:15 Yung-lung Taiwan  0.1
23 Jul 2021 07:15 Hsin-chiang Taiwan  0.1
23 Jul 2021 07:15 Fu-hsing Taiwan  0.1
23 Jul 2021 07:15 Pu-tai Taiwan  0.1
23 Jul 2021 07:15 Chang-t'an Taiwan  0.1
23 Jul 2021 07:15 Wu-nan Taiwan  0.1
22 Jul 2021 23:30 Qianshan China  0.1
20 Jul 2021 20:00 Aberdeen Hong Kong (China)  0.1
20 Jul 2021 20:00 Won Hang Hong Kong (China)  0.1
20 Jul 2021 20:00 Tain Sha Tsui Hong Kong (China)  0.1
20 Jul 2021 20:00 Central Hong Kong (China)  0.1
20 Jul 2021 20:00 Kowloon Hong Kong (China)  0.1
20 Jul 2021 20:00 Wan Chai Hong Kong (China)  0.1
20 Jul 2021 20:00 Chung Hom Kok Hong Kong (China)  0.1
20 Jul 2021 20:00 North Point Hong Kong (China)  0.1
20 Jul 2021 20:00 Chek Chue Hong Kong (China)  0.1
20 Jul 2021 20:00 Crocodile Hill Hong Kong (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 23:30 Guanjing China  0.1
23 Jul 2021 18:00 Ta-lin-pu Taiwan  0.1
23 Jul 2021 18:00 I-jen Taiwan  0.1
23 Jul 2021 18:00 Kao-hsiung Taiwan  0.1
20 Jul 2021 21:15 Wanshan China  0.1
23 Jul 2021 18:00 Kuei-shan Taiwan  0.1
23 Jul 2021 18:00 Hung-nan-li Taiwan  0.1
23 Jul 2021 18:00 K'o-tzu-liao Taiwan  0.1
23 Jul 2021 18:00 Yung-an-ts'un Taiwan  0.1
23 Jul 2021 08:00 Hsia-lun Taiwan  0.1
21 Jul 2021 01:30 Shangyang China  0.1
23 Jul 2021 18:00 Hai-pu Taiwan  0.1
23 Jul 2021 07:30 Sa-ti Taiwan  0.1
23 Jul 2021 07:30 Hai-kou Taiwan  0.1
21 Jul 2021 13:45 Raoping China  0.1
21 Jul 2021 13:45 Zhelin China  0.1
21 Jul 2021 13:45 Shenao China  0.1
21 Jul 2021 13:45 Nanao China  0.1
21 Jul 2021 13:45 Chelim China  0.1
21 Jul 2021 13:45 Gongkou China  0.1
21 Jul 2021 13:45 Dongshan China  0.1
23 Jul 2021 00:00 Hsi-niu-chiao China  0.1
23 Jul 2021 08:15 Chung-p'ing Taiwan  0.1
23 Jul 2021 18:00 Chung-ho Taiwan  0.1
23 Jul 2021 10:00 Shih-shih China  0.1
23 Jul 2021 10:00 Yakou China  0.1
23 Jul 2021 10:00 Yongning China  0.1
23 Jul 2021 10:00 Shihu China  0.1
23 Jul 2021 10:00 Dongyuan China  0.1
23 Jul 2021 10:00 Hsiang-chih China  0.1
23 Jul 2021 10:00 Zhangban China  0.1
23 Jul 2021 10:00 Qian'an China  0.1
23 Jul 2021 10:00 Chongwu China  0.1
21 Jul 2021 17:00 Dongjian China  0.1
21 Jul 2021 17:00 Houhu China  0.1
21 Jul 2021 17:00 Houhai China  0.1
23 Jul 2021 00:45 Mong Cai Vietnam  0.1
23 Jul 2021 00:45 Jiangpingxu China  0.1
23 Jul 2021 00:45 Jiangping China  0.1
23 Jul 2021 00:45 Wanwei China  0.1
22 Jul 2021 23:30 Pingshan China  0.1
23 Jul 2021 08:00 Dongsha China  0.1
23 Jul 2021 08:00 Lingchuan China  0.1
23 Jul 2021 08:00 Hushi China  0.1
23 Jul 2021 07:30 Chiang-chun Taiwan  0.1
23 Jul 2021 18:00 An-ping Taiwan  0.1
23 Jul 2021 18:00 San-ku-ts'un Taiwan  0.1
23 Jul 2021 07:30 Lianhe China  0.1
23 Jul 2021 07:30 Ch'ing-hsu Taiwan  0.1
23 Jul 2021 07:30 Shijing China  0.1
23 Jul 2021 07:30 Chin-men Tao Taiwan  0.1
23 Jul 2021 07:30 Yang-chai Taiwan  0.1
23 Jul 2021 07:30 Anhai China  0.1
23 Jul 2021 07:30 Tung-shih China  0.1
23 Jul 2021 07:30 Weitou China  0.1
23 Jul 2021 07:30 Chin-ching China  0.1