Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China
21 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 HWRF
Exposed countries China, Vietnam
Exposed population No people in Category 1 or higher
Maximum wind speed 58 km/h
Maximum storm surge 0.4 m (23 Jul 00:30 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
HWRF Current 58 km/h 0.4 m 175 mm 0.5
HWRF Overall 137 km/h 1.2 m 746 mm 0.5

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

TOP

Wind

137 km/h

Up to 680 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 18:00 UTC
CategoryCountryPopulation 
Tropical StormChina, Vietnam679,012
+
China619,582 
Vietnam59,430 

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 68 - - - - - - -
GREEN 2 19 Jul 2021 00:00 86 -
- - - - - China
GREEN 3 19 Jul 2021 06:00 101 -
- - - - - China
GREEN 4 19 Jul 2021 12:00 119 -
- - - - - China
GREEN 5 19 Jul 2021 18:00 122 -
- - - - - China
GREEN 6 20 Jul 2021 00:00 130 -
- - - - - China
GREEN 7 20 Jul 2021 06:00 137 Few people
- - - - China
GREEN 8 20 Jul 2021 12:00 137 40 thousand
- - - - China
GREEN 9 20 Jul 2021 18:00 104 -
- - - - - China
GREEN 10 21 Jul 2021 00:00 61 -
- - - - - China
GREEN 11 21 Jul 2021 06:00 43 - - - - - - -
GREEN 12 21 Jul 2021 12:00 47 - - - - - - -
GREEN 13 21 Jul 2021 18:00 97 -
- - - - - China, Vietnam
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 18:00 UTC
LevelCountryPopulation 
500-750 mmChina1,359 
250-500 mmChina, Laos375,232
+
China372,237 
Laos2,995 
100-250 mmChina, Vietnam, Laos4,938,713
+
China4,709,221 
Vietnam104,694 
Laos124,796 
50-100 mmChina, Vietnam, Laos14,182,625
+
China9,422,991 
Vietnam4,527,244 
Laos232,389 

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 18:00 150 -
- - - - - China, Hong Kong
Blue 2 19 Jul 2021 00:00 178 -
- - - - - China, Macao
Blue 3 19 Jul 2021 06:00 138 -
- - - - - China
Blue 4 19 Jul 2021 12:00 274 -
- - - - - China
Blue 5 19 Jul 2021 18:00 277 5 thousand
- - - - China
Blue 6 20 Jul 2021 00:00 290 550 thousand
- - - - China, Macao
Blue 7 20 Jul 2021 06:00 272 Few people
- - - - China, Hong Kong
Blue 8 20 Jul 2021 12:00 189 440 thousand
- - - - China
Blue 9 20 Jul 2021 18:00 228 630 thousand
- - - - China
Blue 10 21 Jul 2021 00:00 328 170 thousand
- - - - China, Vietnam
Blue 11 21 Jul 2021 06:00 111 3 thousand
- - - - China
Blue 12 21 Jul 2021 12:00 86 -
- - - - - China
Blue 13 21 Jul 2021 18:00 760 5.3 million
- - China, Vietnam, Laos




Impact estimation for the next 72h
TOP

StormSurge

0.4 m

The maximum Storm surge height is  0.4m in San Shah, China. This height is estimated for 23 Jul 2021 00:30 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 18:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
23 Jul 2021 00:30 San Shah China  0.4
23 Jul 2021 00:30 Gaoshan China  0.4
23 Jul 2021 00:30 Ta-ch'iu China  0.4
23 Jul 2021 00:30 Beicuo China  0.4
23 Jul 2021 00:30 Guanjing China  0.4
23 Jul 2021 00:30 Cao Yu China  0.4
23 Jul 2021 00:30 Qingfeng China  0.4
23 Jul 2021 00:30 Pingtan China  0.4
22 Jul 2021 23:45 Houtian China  0.3
21 Jul 2021 23:15 Bailong China  0.3
21 Jul 2021 23:15 Beimu China  0.3
21 Jul 2021 23:15 Yong'an China  0.3
21 Jul 2021 23:15 Shankou China  0.3
21 Jul 2021 23:30 Yingluo China  0.3
23 Jul 2021 06:45 Basuo China  0.2
23 Jul 2021 06:45 Beili China  0.2
23 Jul 2021 06:45 Duntou China  0.2
23 Jul 2021 06:45 Changhua China  0.2
23 Jul 2021 06:30 Gancheng China  0.2
23 Jul 2021 06:30 Banqiao China  0.2
23 Jul 2021 06:30 Longyou China  0.2
22 Jul 2021 06:00 Paipu China  0.2
22 Jul 2021 06:00 Baimajing China  0.2
22 Jul 2021 06:00 Hsin-ying China  0.2
22 Jul 2021 06:00 Eman China  0.2
22 Jul 2021 06:00 Taan China  0.2
22 Jul 2021 06:00 Hsin-chou China  0.2
21 Jul 2021 18:00 Huangge China  0.2
21 Jul 2021 18:00 Min-chung China  0.2
21 Jul 2021 18:00 Wan-ch'ing-sha China  0.2
21 Jul 2021 18:00 Jiang'ouwei China  0.2
21 Jul 2021 18:00 Cheng'anwei China  0.2
21 Jul 2021 18:00 Fumunchai China  0.2
21 Jul 2021 18:00 Fumuntschai China  0.2
21 Jul 2021 18:00 Baihao China  0.2
21 Jul 2021 18:00 Taiping China  0.2
21 Jul 2021 18:00 Sha-ching China  0.2
21 Jul 2021 18:00 Heping China  0.2
23 Jul 2021 06:30 Lingtou China  0.2
21 Jul 2021 18:15 Cuihengcun China  0.2
21 Jul 2021 18:15 Xiazha China  0.2
21 Jul 2021 18:15 Qishan China  0.2
21 Jul 2021 18:15 Ch'i-ao China  0.2
22 Jul 2021 06:45 Shuiwei China  0.2
22 Jul 2021 06:45 Liu-sha-ying China  0.2
22 Jul 2021 06:45 Liusha China  0.2
22 Jul 2021 06:45 Mai-ch'en-hsu China  0.2
21 Jul 2021 23:45 Yuen Long Hong Kong (China)  0.2
21 Jul 2021 23:45 Tai Po Hong Kong (China)  0.2
21 Jul 2021 23:45 Tai Po Industrial Estate Hong Kong (China)  0.2
21 Jul 2021 23:45 Fung Yuen Hong Kong (China)  0.2
21 Jul 2021 23:45 Dabu Hong Kong (China)  0.2
21 Jul 2021 23:45 Sha Tau Kok China  0.2
21 Jul 2021 23:45 Cheung Kang Hong Kong (China)  0.2
21 Jul 2021 23:45 Imtin China  0.2
21 Jul 2021 23:45 Cheung Wo Hong Kong (China)  0.2
21 Jul 2021 23:45 Pak Sha Au Hong Kong (China)  0.2
21 Jul 2021 23:45 Long Ke Hong Kong (China)  0.2
21 Jul 2021 23:45 Khitschhung China  0.2
22 Jul 2021 04:15 Xiuying China  0.2
22 Jul 2021 04:15 Haikou China  0.2
22 Jul 2021 04:15 Puqian China  0.2
21 Jul 2021 22:30 Hsi-ch'ang-hsu China  0.2
21 Jul 2021 22:30 Hsi-ch'ang China  0.2
21 Jul 2021 22:30 Shagang China  0.2
21 Jul 2021 22:30 Beihai China  0.2
21 Jul 2021 22:30 Dangjiang China  0.2
21 Jul 2021 22:30 Gaode China  0.2
21 Jul 2021 22:30 Guchengling China  0.2
21 Jul 2021 22:30 Qianjiang China  0.2
21 Jul 2021 23:45 Cheung Sha Wan Hong Kong (China)  0.2
21 Jul 2021 23:45 Tsz Wa Chan Hong Kong (China)  0.2
21 Jul 2021 23:45 Yau Ma Po Hong Kong (China)  0.2
21 Jul 2021 23:45 Sai Kung Hong Kong (China)  0.2
22 Jul 2021 06:45 Maichen China  0.2
21 Jul 2021 18:15 Nantou China  0.2
22 Jul 2021 04:30 Boshegang China  0.2
22 Jul 2021 04:00 Haian China  0.2
21 Jul 2021 22:30 Caotan China  0.2
22 Jul 2021 06:45 Haikang China  0.2
22 Jul 2021 06:45 Ch'i-shui China  0.2
22 Jul 2021 07:30 Taiping China  0.2
22 Jul 2021 07:30 Xianmai China  0.2
22 Jul 2021 07:30 Longshe China  0.2
22 Jul 2021 07:30 Dongli China  0.2
22 Jul 2021 04:15 Longtang China  0.2
21 Jul 2021 18:45 Chiu-chieh China  0.2
21 Jul 2021 18:45 Shekou China  0.2
23 Jul 2021 06:30 Foluo China  0.2
22 Jul 2021 04:30 Qianshan China  0.2
21 Jul 2021 22:00 Longtousha China  0.2
21 Jul 2021 23:45 Dapeng China  0.2
21 Jul 2021 23:45 Taipang China  0.2
21 Jul 2021 23:45 Shagang China  0.2
21 Jul 2021 19:15 Castle Peak New Town Hong Kong (China)  0.2
21 Jul 2021 19:15 Tuen Mun Hong Kong (China)  0.2
22 Jul 2021 07:15 Tung-li China  0.2
22 Jul 2021 07:15 Dongshan China  0.2
21 Jul 2021 22:45 Guanjing China  0.2
22 Jul 2021 01:30 Yingzai China  0.2
22 Jul 2021 05:30 Luewei China  0.2
22 Jul 2021 05:30 Shalan China  0.2
22 Jul 2021 05:30 Shadi China  0.2
22 Jul 2021 05:30 Dalangwan China  0.2
22 Jul 2021 05:00 Dayang China  0.2
22 Jul 2021 05:00 Guanghai China  0.2
22 Jul 2021 04:15 Qiaotou China  0.2
21 Jul 2021 18:15 Tiantou China  0.2
21 Jul 2021 18:15 Tonggu China  0.2
23 Jul 2021 01:00 Gongche China  0.2
23 Jul 2021 01:00 Maoling China  0.2
23 Jul 2021 01:00 Kangxiling China  0.2
23 Jul 2021 01:00 Longmen China  0.2
23 Jul 2021 01:00 Jiuya China  0.2
23 Jul 2021 01:00 Dafanpo China  0.2
23 Jul 2021 01:00 Pingshan China  0.2
21 Jul 2021 23:45 Aotou China  0.2
21 Jul 2021 18:00 Doushan China  0.2
21 Jul 2021 18:00 Chixi China  0.2
22 Jul 2021 04:00 Jinhe China  0.2
22 Jul 2021 04:00 Wai-lo China  0.2
21 Jul 2021 18:00 Huangchong China  0.2
21 Jul 2021 18:00 Meige China  0.2
21 Jul 2021 18:00 Mashan China  0.2
21 Jul 2021 18:00 Mei-ko China  0.2
21 Jul 2021 18:00 Pingsha China  0.2
21 Jul 2021 18:00 Doumen China  0.2
21 Jul 2021 18:00 Ching-an China  0.2
21 Jul 2021 18:00 Xiaolin China  0.2
22 Jul 2021 02:15 Nanping China  0.1
22 Jul 2021 02:15 Maogang China  0.1
22 Jul 2021 02:15 Macau Macau (China)  0.1
22 Jul 2021 02:15 Taipa Macau (China)  0.1
22 Jul 2021 02:15 Coloane Macau (China)  0.1
22 Jul 2021 02:15 Heung chau China  0.1
21 Jul 2021 21:45 Mong Cai Vietnam  0.1
21 Jul 2021 21:45 Jiangpingxu China  0.1
21 Jul 2021 21:45 Jiangping China  0.1
21 Jul 2021 21:45 Wanwei China  0.1
22 Jul 2021 13:30 Zhanjiang China  0.1
22 Jul 2021 13:30 Ma-hsieh China  0.1
22 Jul 2021 13:30 Dongjian China  0.1
22 Jul 2021 13:30 Badongxu China  0.1
22 Jul 2021 13:30 Houhu China  0.1
22 Jul 2021 13:30 Bengtang China  0.1
22 Jul 2021 13:30 Houhai China  0.1
22 Jul 2021 13:30 Baisha China  0.1
22 Jul 2021 13:30 Shaoyao China  0.1
22 Jul 2021 13:30 Xingyou China  0.1
22 Jul 2021 13:30 Huangwu China  0.1
22 Jul 2021 13:30 Doulongcun China  0.1
22 Jul 2021 06:45 Xinxing China  0.1
24 Jul 2021 06:30 Wangchuan China  0.1
24 Jul 2021 06:30 Fengting China  0.1
24 Jul 2021 06:30 Dawu China  0.1
24 Jul 2021 06:30 Fengwei China  0.1
24 Jul 2021 06:30 Hsiao-tso China  0.1
24 Jul 2021 06:30 Zhongmen China  0.1
21 Jul 2021 22:30 Hsi-niu-chiao China  0.1
22 Jul 2021 00:30 Luzui China  0.1
22 Jul 2021 06:30 Huangpo China  0.1
22 Jul 2021 06:30 Chiu-wu-ch'uan China  0.1
22 Jul 2021 06:30 Hai-lu China  0.1
22 Jul 2021 05:45 Nayan China  0.1
22 Jul 2021 06:45 Guangcun China  0.1
22 Jul 2021 17:00 Shuidong China  0.1
22 Jul 2021 17:00 Ch'i-ching China  0.1
22 Jul 2021 17:00 Dianbai China  0.1
22 Jul 2021 17:00 Danchang China  0.1
22 Jul 2021 17:00 Magang China  0.1
22 Jul 2021 16:00 Potou China  0.1
22 Jul 2021 15:45 Meilu China  0.1
22 Jul 2021 04:00 Beidou China  0.1
22 Jul 2021 04:00 Chen-hai China  0.1
22 Jul 2021 04:00 Shen-ching China  0.1
21 Jul 2021 21:45 Bailong China  0.1
21 Jul 2021 21:45 Jiangshan China  0.1
22 Jul 2021 03:00 Baijiao China  0.1
22 Jul 2021 03:00 San-tsao China  0.1
21 Jul 2021 18:00 Fan Kwai Tong Hong Kong (China)  0.1
22 Jul 2021 10:45 Lajiwei China  0.1
22 Jul 2021 10:45 Tai Long Wan Hong Kong (China)  0.1
22 Jul 2021 10:45 Lau Fau Sha Hong Kong (China)  0.1
22 Jul 2021 10:45 Ngau Kwu Long Hong Kong (China)  0.1
22 Jul 2021 10:45 Ham Tin Hong Kong (China)  0.1
22 Jul 2021 17:00 Diancheng China  0.1
24 Jul 2021 06:45 P'u-hsi China  0.1
24 Jul 2021 06:45 P'u-hsi-ch'eng China  0.1
24 Jul 2021 06:45 Meizhou China  0.1
22 Jul 2021 10:15 Yuen Long Hong Kong (China)  0.1
22 Jul 2021 10:15 Sz Pak Hong Kong (China)  0.1
22 Jul 2021 17:00 Rudong China  0.1
24 Jul 2021 05:00 Yuxi China  0.1
24 Jul 2021 05:00 Tangbian China  0.1
24 Jul 2021 05:00 Jiangjing China  0.1
24 Jul 2021 05:00 Longtian China  0.1
24 Jul 2021 05:00 Gangtou China  0.1
24 Jul 2021 05:00 Shicheng China  0.1
24 Jul 2021 05:00 Chiang-k'ou China  0.1
24 Jul 2021 05:00 Daitou China  0.1
24 Jul 2021 05:00 Nanri China  0.1
24 Jul 2021 05:00 Fuye China  0.1
21 Jul 2021 18:45 Donghong China  0.1
21 Jul 2021 18:45 Jinghai China  0.1
21 Jul 2021 18:45 Ch'ao-yang-hsien China  0.1
21 Jul 2021 18:45 Haimen China  0.1
21 Jul 2021 18:45 Dahao China  0.1
21 Jul 2021 18:45 Aotou China  0.1
21 Jul 2021 18:45 Daitou China  0.1
24 Jul 2021 06:30 Dongsha China  0.1
24 Jul 2021 06:30 Lingchuan China  0.1
24 Jul 2021 06:30 Hushi China  0.1
21 Jul 2021 19:00 Shantou China  0.1
21 Jul 2021 19:00 Guangao China  0.1
22 Jul 2021 05:30 Chengcun China  0.1
22 Jul 2021 05:30 Santouzui China  0.1
22 Jul 2021 05:30 Hsi-t'ou China  0.1
22 Jul 2021 05:30 Lengzilin China  0.1
22 Jul 2021 05:30 Pinggang China  0.1
22 Jul 2021 05:30 Jiangcheng China  0.1
22 Jul 2021 05:30 Baipu China  0.1
24 Jul 2021 02:30 Chiang-t'ien China  0.1
21 Jul 2021 21:30 Dang Noi Vietnam  0.1
21 Jul 2021 21:30 Dam Ha Vietnam  0.1
22 Jul 2021 02:30 Wanshan China  0.1
21 Jul 2021 22:00 Baishawan China  0.1
21 Jul 2021 22:00 Fangcheng China  0.1
21 Jul 2021 22:00 Ch'i-sha China  0.1
21 Jul 2021 21:45 Cai Kien Vietnam  0.1
21 Jul 2021 21:45 Cot Doai Vietnam  0.1
21 Jul 2021 21:45 Vinh Thuc Vietnam  0.1
21 Jul 2021 21:45 Dong Cay Vietnam  0.1
22 Jul 2021 18:00 Dagou China  0.1
23 Jul 2021 15:45 Chia-ho-ts'un Taiwan  0.1
23 Jul 2021 15:45 Fang-shan Taiwan  0.1
23 Jul 2021 15:45 Feng-chiang Taiwan  0.1
23 Jul 2021 15:45 She-liao Taiwan  0.1
23 Jul 2021 15:45 Che-cheng Taiwan  0.1
23 Jul 2021 16:15 Liu-chiu Hsu Taiwan  0.1
22 Jul 2021 02:30 Hsin-chou China  0.1
21 Jul 2021 23:00 Hsia-yung China  0.1
24 Jul 2021 05:00 Pinghai China  0.1
23 Jul 2021 15:30 Maobitou Taiwan  0.1
23 Jul 2021 15:30 Ta-kuang Taiwan  0.1
21 Jul 2021 21:45 Houmen China  0.1
23 Jul 2021 16:15 T'ien-ch'ien-ts'o Taiwan  0.1
22 Jul 2021 16:45 Shangyang China  0.1
23 Jul 2021 15:15 Shui-ti-liao Taiwan  0.1
24 Jul 2021 02:30 Chang-chiang China  0.1
24 Jul 2021 02:30 Guhuai China  0.1
23 Jul 2021 22:00 Hai huang Taiwan  0.1
23 Jul 2021 22:00 Yuan-li Taiwan  0.1
23 Jul 2021 22:00 Tung-hsiao Taiwan  0.1
23 Jul 2021 22:00 Ch'i-ting Taiwan  0.1
22 Jul 2021 10:30 Renshan China  0.1
22 Jul 2021 10:30 Jen-shan China  0.1
22 Jul 2021 10:30 Fanhe China  0.1
22 Jul 2021 10:30 Pinghai China  0.1
22 Jul 2021 01:30 Nanluo China  0.1
22 Jul 2021 01:30 Haitou China  0.1
23 Jul 2021 21:45 Ching-shui Taiwan  0.1
24 Jul 2021 02:15 Chin-feng China  0.1
24 Jul 2021 02:15 Wuhang China  0.1
22 Jul 2021 10:15 Guanchang China  0.1
22 Jul 2021 00:15 Nam Wan Hong Kong (China)  0.1
22 Jul 2021 00:15 Hoi Pa Hong Kong (China)  0.1
22 Jul 2021 00:15 Lo Tik Wan Hong Kong (China)  0.1
22 Jul 2021 00:15 Tsuen Wan Hong Kong (China)  0.1
22 Jul 2021 00:15 Lo So Shing Hong Kong (China)  0.1
22 Jul 2021 00:15 Ha Kwai Chung Hong Kong (China)  0.1
22 Jul 2021 00:15 Pok Fu Lam Hong Kong (China)  0.1
22 Jul 2021 00:15 Wa Fu Estate Hong Kong (China)  0.1
22 Jul 2021 00:15 Kennedy Town Hong Kong (China)  0.1
22 Jul 2021 00:15 Aberdeen Hong Kong (China)  0.1
22 Jul 2021 00:15 Won Hang Hong Kong (China)  0.1
22 Jul 2021 00:15 Tain Sha Tsui Hong Kong (China)  0.1
22 Jul 2021 00:15 Central Hong Kong (China)  0.1
22 Jul 2021 00:15 Kowloon Hong Kong (China)  0.1
22 Jul 2021 00:15 Wan Chai Hong Kong (China)  0.1
22 Jul 2021 00:15 Chung Hom Kok Hong Kong (China)  0.1
22 Jul 2021 00:15 North Point Hong Kong (China)  0.1
22 Jul 2021 00:15 Chek Chue Hong Kong (China)  0.1
22 Jul 2021 00:15 Crocodile Hill Hong Kong (China)  0.1
23 Jul 2021 15:30 Hou-ta-ts'o Taiwan  0.1
23 Jul 2021 15:30 Tung-chiang Taiwan  0.1
23 Jul 2021 15:30 Wu-lung Taiwan  0.1
23 Jul 2021 22:00 Lu-kang Taiwan  0.1
23 Jul 2021 15:30 Ta-lin-pu Taiwan  0.1
23 Jul 2021 15:30 I-jen Taiwan  0.1
21 Jul 2021 18:45 Shenquan China  0.1