Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China
20 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, China
Exposed population No people in Category 1 or higher
Maximum wind speed 126 km/h
Maximum storm surge 1.2 m (20 Jul 11:15 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 126 km/h 1.2 m 274 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 06:00 UTC
CategoryCountryPopulation 
Tropical StormTaiwan, China4,331,413
+
Taiwan2,837,824 
China1,493,589 

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 -
- - - - - Taiwan, China
Download:





Impact estimation for the next 72h
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Rainfall

795 mm

Up to 20.9 million can be affected by rain higher than 100mm (see SSHS)





Rain exposed population - AoIs

Estimations based on the bulletin of 20 Jul 2021 06:00 UTC
LevelCountryPopulation 
250-500 mmChina508,804 
100-250 mmChina, Vietnam, Philippines20,383,658
+
China12,948,753 
Vietnam1,200,025 
Philippines6,234,879 
50-100 mmChina, Taiwan, Vietnam, Laos, Thailand, Philippines, Cambodia31,917,972
+
China15,343,211 
Taiwan2,974 
Vietnam9,604,911 
Laos1,606,002 
Thailand381,826 
Philippines4,978,562 
Cambodia484 

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 06:00 443 20.9 million
- - - China, Taiwan, Vietnam, Laos, Thailand, Philippines, 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 11:15 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 06:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
20 Jul 2021 11:15 Beidou China  1.2
20 Jul 2021 11:15 Chen-hai China  1.2
20 Jul 2021 11:15 Shen-ching China  1.2
20 Jul 2021 06:15 Shalan China  1.1
20 Jul 2021 06:15 Dayang China  1.1
20 Jul 2021 06:15 Dalangwan China  1.1
20 Jul 2021 06:15 Guanghai China  1.1
20 Jul 2021 06:00 Luewei China  1.0
20 Jul 2021 06:00 Shadi China  1.0
20 Jul 2021 06:00 Tiantou China  0.9
20 Jul 2021 06:00 Tonggu China  0.9
20 Jul 2021 07:00 Doushan China  0.7
20 Jul 2021 07:00 Chixi 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 06:00 Meige China  0.5
20 Jul 2021 06:00 Mashan China  0.5
20 Jul 2021 06:00 Pingsha China  0.5
20 Jul 2021 06:00 Doumen China  0.5
20 Jul 2021 06:45 Huangchong China  0.5
20 Jul 2021 06:45 Mei-ko China  0.5
20 Jul 2021 06:30 Ching-an China  0.5
20 Jul 2021 06:30 Xiaolin China  0.5
22 Jul 2021 14:15 San Shah China  0.3
22 Jul 2021 14:15 Gaoshan China  0.3
22 Jul 2021 14:15 Ta-ch'iu China  0.3
22 Jul 2021 14:15 Beicuo China  0.3
22 Jul 2021 14:15 Guanjing China  0.3
22 Jul 2021 14:15 Cao Yu China  0.3
22 Jul 2021 14:15 Qingfeng China  0.3
22 Jul 2021 14:15 Pingtan China  0.3
23 Jul 2021 01:15 Bailong China  0.3
23 Jul 2021 01:15 Beimu China  0.3
23 Jul 2021 01:15 Yong'an China  0.3
23 Jul 2021 01:15 Shankou China  0.3
20 Jul 2021 12:45 Lengzilin China  0.3
23 Jul 2021 01:15 Yingluo China  0.3
20 Jul 2021 13:15 Santouzui China  0.3
20 Jul 2021 13:15 Hsi-t'ou China  0.3
23 Jul 2021 00:15 Caotan China  0.3
23 Jul 2021 00:00 Longtousha China  0.3
20 Jul 2021 06:00 Nanping China  0.3
20 Jul 2021 06:00 Cuihengcun China  0.3
20 Jul 2021 06:00 Xiazha China  0.3
20 Jul 2021 06:00 Maogang China  0.3
20 Jul 2021 06:00 Macau Macau (China)  0.3
20 Jul 2021 06:00 Qishan China  0.3
20 Jul 2021 06:00 Heung chau China  0.3
20 Jul 2021 06:00 Ch'i-ao China  0.3
20 Jul 2021 06:00 Baijiao China  0.3
20 Jul 2021 06:00 San-tsao China  0.3
20 Jul 2021 06:00 Taipa Macau (China)  0.3
20 Jul 2021 06:00 Coloane Macau (China)  0.3
20 Jul 2021 06:00 Fan Kwai Tong Hong Kong (China)  0.3
20 Jul 2021 06:00 Nantou China  0.3
20 Jul 2021 17:00 Chengcun China  0.3
21 Jul 2021 23:15 Hsi-ch'ang-hsu China  0.3
21 Jul 2021 23:15 Hsi-ch'ang China  0.3
21 Jul 2021 23:15 Shagang China  0.3
21 Jul 2021 23:15 Beihai China  0.3
21 Jul 2021 23:15 Dangjiang China  0.3
21 Jul 2021 23:15 Gaode China  0.3
21 Jul 2021 23:15 Guchengling China  0.3
21 Jul 2021 23:15 Qianjiang China  0.3
20 Jul 2021 14:30 Shangyang China  0.3
21 Jul 2021 23:00 Guanjing China  0.3
22 Jul 2021 01:15 Yingzai China  0.3
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
20 Jul 2021 06:00 Min-chung China  0.2
20 Jul 2021 06:00 Wan-ch'ing-sha China  0.2
20 Jul 2021 06:00 Cheng'anwei China  0.2
20 Jul 2021 06:00 Tai Long Wan Hong Kong (China)  0.2
20 Jul 2021 06:00 Shekou China  0.2
20 Jul 2021 06:00 Lau Fau Sha Hong Kong (China)  0.2
20 Jul 2021 06:00 Cheung Sha Wan Hong Kong (China)  0.2
20 Jul 2021 06:00 Tsz Wa Chan Hong Kong (China)  0.2
20 Jul 2021 06:00 Yau Ma Po Hong Kong (China)  0.2
20 Jul 2021 06:00 Sai Kung Hong Kong (China)  0.2
20 Jul 2021 06:00 Chiu-chieh China  0.2
20 Jul 2021 06:00 Ngau Kwu Long Hong Kong (China)  0.2
20 Jul 2021 06:00 Castle Peak New Town Hong Kong (China)  0.2
20 Jul 2021 06:00 Tuen Mun Hong Kong (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 06:00 Ham Tin Hong Kong (China)  0.2
20 Jul 2021 06:15 Dapeng China  0.2
20 Jul 2021 06:15 Taipang China  0.2
20 Jul 2021 06:15 Shagang China  0.2
20 Jul 2021 06:00 Lajiwei China  0.2
22 Jul 2021 23:30 Hsi-niu-chiao China  0.2
22 Jul 2021 23:30 Pingshan China  0.2
20 Jul 2021 09:00 Huangge China  0.2
20 Jul 2021 09:00 Jiang'ouwei China  0.2
20 Jul 2021 09:00 Fumunchai China  0.2
20 Jul 2021 09:00 Fumuntschai China  0.2
20 Jul 2021 09:00 Baihao China  0.2
20 Jul 2021 09:00 Taiping China  0.2
20 Jul 2021 09:00 Sha-ching China  0.2
20 Jul 2021 09:00 Heping China  0.2
20 Jul 2021 06:00 Yuen Long Hong Kong (China)  0.2
20 Jul 2021 06:00 Sz Pak Hong Kong (China)  0.2
22 Jul 2021 23:45 Longmen China  0.2
22 Jul 2021 23:45 Dafanpo China  0.2
22 Jul 2021 23:00 Liu-sha-ying China  0.2
20 Jul 2021 06:00 Aotou China  0.2
20 Jul 2021 20:45 Houtian China  0.2
22 Jul 2021 23:00 Shuiwei China  0.2
22 Jul 2021 23:00 Liusha China  0.2
22 Jul 2021 23:00 Mai-ch'en-hsu China  0.2
20 Jul 2021 06:00 Luzui China  0.2
22 Jul 2021 23:30 Gongche China  0.2
22 Jul 2021 23:30 Ch'i-sha China  0.2
22 Jul 2021 23:00 Maichen China  0.2
20 Jul 2021 15:45 Diancheng China  0.2
20 Jul 2021 15:45 Rudong China  0.2
22 Jul 2021 23:30 Qiaotou China  0.2
22 Jul 2021 22:45 Mong Cai Vietnam  0.2
22 Jul 2021 22:45 Jiangpingxu China  0.2
22 Jul 2021 22:45 Jiangping China  0.2
22 Jul 2021 22:45 Wanwei China  0.2
22 Jul 2021 04:00 Taiping China  0.2
22 Jul 2021 04:00 Xianmai China  0.2
22 Jul 2021 04:00 Longshe China  0.2
22 Jul 2021 04:00 Dongli China  0.2
22 Jul 2021 23:00 Baishawan China  0.2
22 Jul 2021 03:45 Dongshan China  0.2
22 Jul 2021 23:30 Xinxing China  0.2
22 Jul 2021 22:45 Bailong China  0.2
22 Jul 2021 22:45 Jiangshan China  0.2
22 Jul 2021 03:45 Tung-li China  0.2
20 Jul 2021 06:15 Wanshan China  0.2
21 Jul 2021 06:30 Ma-hsieh China  0.2
21 Jul 2021 06:30 Badongxu China  0.2
21 Jul 2021 06:30 Potou China  0.2
21 Jul 2021 06:30 Bengtang China  0.2
21 Jul 2021 06:30 Baisha China  0.2
21 Jul 2021 06:30 Shaoyao China  0.2
21 Jul 2021 06:30 Xingyou China  0.2
21 Jul 2021 06:30 Huangpo China  0.2
21 Jul 2021 06:30 Chiu-wu-ch'uan China  0.2
22 Jul 2021 23:00 Fangcheng China  0.2
22 Jul 2021 23:00 Guangcun China  0.2
22 Jul 2021 23:15 Xiuying China  0.1
22 Jul 2021 23:15 Haian China  0.1
22 Jul 2021 23:15 Haikou 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
22 Jul 2021 22:45 Eman China  0.1
22 Jul 2021 23:15 Boshegang China  0.1
22 Jul 2021 03:00 Dongjian China  0.1
22 Jul 2021 03:00 Houhu China  0.1
22 Jul 2021 03:00 Houhai China  0.1
22 Jul 2021 23:00 Longtang China  0.1
22 Jul 2021 09:45 Huangwu China  0.1
22 Jul 2021 09:45 Nayan China  0.1
22 Jul 2021 09:45 Doulongcun China  0.1
22 Jul 2021 23:00 Cai Kien Vietnam  0.1
22 Jul 2021 23:00 Cot Doai Vietnam  0.1
22 Jul 2021 23:00 Vinh Thuc Vietnam  0.1
22 Jul 2021 23:00 Dang Noi Vietnam  0.1
22 Jul 2021 23:00 Dam Ha Vietnam  0.1
22 Jul 2021 23:00 Dong Cay Vietnam  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
22 Jul 2021 10:00 Puqian China  0.1
20 Jul 2021 18:45 Hsia-yung China  0.1
22 Jul 2021 13:00 Renshan China  0.1
22 Jul 2021 13:00 Jen-shan China  0.1
22 Jul 2021 13:00 Fanhe China  0.1
22 Jul 2021 13:00 Pinghai China  0.1
22 Jul 2021 16:30 Chia-ho-ts'un Taiwan  0.1
22 Jul 2021 16:30 Fang-shan Taiwan  0.1
22 Jul 2021 16:30 Feng-chiang Taiwan  0.1
22 Jul 2021 16:30 She-liao Taiwan  0.1
22 Jul 2021 16:30 Che-cheng Taiwan  0.1
22 Jul 2021 16:30 Liu-chiu Hsu Taiwan  0.1
22 Jul 2021 17:15 Maobitou Taiwan  0.1
22 Jul 2021 17:15 Ta-kuang Taiwan  0.1
22 Jul 2021 16:30 T'ien-ch'ien-ts'o Taiwan  0.1
22 Jul 2021 16:30 Shui-ti-liao Taiwan  0.1
22 Jul 2021 11:15 Zhanjiang China  0.1
22 Jul 2021 12:00 Shuidong China  0.1
22 Jul 2021 12:00 Ch'i-ching China  0.1
22 Jul 2021 12:00 Dianbai China  0.1
22 Jul 2021 12:00 Danchang China  0.1
22 Jul 2021 12:00 Magang China  0.1
20 Jul 2021 13:15 Tai Tam Hong Kong (China)  0.1
20 Jul 2021 13:15 Stanley Hong Kong (China)  0.1
20 Jul 2021 13:15 San Wan Ho Shau Hong Kong (China)  0.1
20 Jul 2021 13:15 Yau Tong Hong Kong (China)  0.1
20 Jul 2021 13:15 Rennie's Mill Hong Kong (China)  0.1
20 Jul 2021 13:15 A Kung Ngam Hong Kong (China)  0.1
20 Jul 2021 13:15 Chai Wan Hong Kong (China)  0.1
20 Jul 2021 13:15 Sau Mau Ping Hong Kong (China)  0.1
20 Jul 2021 13:15 Hok Tsui Wan Hong Kong (China)  0.1
20 Jul 2021 13:15 Chik Sha Hong Kong (China)  0.1
20 Jul 2021 13:15 Hang Hau Hong Kong (China)  0.1
20 Jul 2021 13:15 Tei Tong Tsui Hong Kong (China)  0.1
20 Jul 2021 13:15 Tai Wan Tau Hong Kong (China)  0.1
22 Jul 2021 16:45 Ta-lin-pu Taiwan  0.1
22 Jul 2021 16:45 Hou-ta-ts'o Taiwan  0.1
22 Jul 2021 16:45 I-jen Taiwan  0.1
22 Jul 2021 16:45 Tung-chiang Taiwan  0.1
22 Jul 2021 16:45 Wu-lung Taiwan  0.1
22 Jul 2021 09:30 Meilu China  0.1
22 Jul 2021 09:30 Hai-lu China  0.1
22 Jul 2021 09:45 Qianshan China  0.1
22 Jul 2021 22:45 Paipu China  0.1
22 Jul 2021 22:45 Baimajing China  0.1
22 Jul 2021 22:45 Hsin-ying China  0.1
22 Jul 2021 22:45 Taan China  0.1
22 Jul 2021 22:45 Hsin-chou China  0.1
20 Jul 2021 07:45 Fugong China  0.1
20 Jul 2021 07:45 Haicang China  0.1
20 Jul 2021 07:45 Guankou China  0.1
20 Jul 2021 07:45 Gangwei China  0.1
20 Jul 2021 07:45 Songyu China  0.1
20 Jul 2021 07:45 Hsing-lin China  0.1
20 Jul 2021 07:45 Xucuo China  0.1
20 Jul 2021 07:45 Gulangyu China  0.1
20 Jul 2021 07:45 Xiamen China  0.1
20 Jul 2021 07:45 Dianqian China  0.1
20 Jul 2021 07:45 Jiangtou China  0.1
20 Jul 2021 07:45 Hecuo China  0.1
20 Jul 2021 07:45 Liuwudian China  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
20 Jul 2021 08:15 Chen-hai China  0.1
20 Jul 2021 08:15 Daomei China  0.1
20 Jul 2021 08:15 Zhenhai China  0.1
22 Jul 2021 16:45 Kao-hsiung Taiwan  0.1
22 Jul 2021 12:30 Houmen 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 15:00 Kuei-shan Taiwan  0.1
22 Jul 2021 15:00 Hung-nan-li Taiwan  0.1
21 Jul 2021 14:15 Dahao China  0.1
21 Jul 2021 14:15 Aotou China  0.1
21 Jul 2021 14:15 Daitou China  0.1
21 Jul 2021 14:15 Guangao China  0.1
21 Jul 2021 14:15 Siwei China  0.1
21 Jul 2021 14:15 Houzhai China  0.1
21 Jul 2021 14:15 Huanglong China  0.1
22 Jul 2021 10:00 Jinhe China  0.1
22 Jul 2021 10:00 Wai-lo China  0.1
20 Jul 2021 06:45 Tianqian China  0.1
20 Jul 2021 06:45 Zhelang China  0.1