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 HWRF
Exposed countries China, Vietnam
Exposed population 90 thousand in Category 1 or higher
Maximum wind speed 137 km/h
Maximum storm surge 1.2 m (20 Jul 14:15 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
HWRF Current 137 km/h 1.2 m 189 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 90 thousand in Category 1 strength or higher (see SSHS)



Wind exposed population - AoIs

Estimations based on the bulletin of 20 Jul 2021 12:00 UTC
CategoryCountryPopulation 
CAT. 1China89,102 
Tropical StormChina, Vietnam4,695,734
+
China4,694,770 
Vietnam963 

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 90 thousand
- - - - China, Vietnam
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 12:00 UTC
LevelCountryPopulation 
250-500 mmChina1,413,535 
100-250 mmChina, Vietnam20,488,411
+
China19,986,170 
Vietnam502,240 
50-100 mmChina, Macao, Hong Kong, Vietnam17,560,845
+
China16,007,650 
Macao579,652 
Hong Kong03 
Vietnam973,538 

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 12:00 666 21.9 million
- - - China, Macao, Hong Kong, Vietnam




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 14:15 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 14:15 Beidou China  1.2
20 Jul 2021 14:15 Chen-hai China  1.2
20 Jul 2021 14:15 Shen-ching China  1.2
20 Jul 2021 13:45 Luewei China  0.9
20 Jul 2021 13:30 Jiangcheng China  0.9
20 Jul 2021 13:30 Baipu China  0.9
20 Jul 2021 13:30 Dagou China  0.9
20 Jul 2021 13:30 Hsin-chou China  0.9
20 Jul 2021 13:45 Shalan China  0.8
20 Jul 2021 14:45 Shadi China  0.8
20 Jul 2021 14:45 Dalangwan China  0.8
23 Jul 2021 09:15 Paipu China  0.7
23 Jul 2021 09:15 Baimajing China  0.7
23 Jul 2021 09:15 Hsin-ying China  0.7
23 Jul 2021 09:15 Eman China  0.7
23 Jul 2021 09:15 Taan China  0.7
23 Jul 2021 09:15 Hsin-chou China  0.7
20 Jul 2021 13:45 Pinggang China  0.6
23 Jul 2021 00:15 San Shah China  0.6
23 Jul 2021 00:15 Gaoshan China  0.6
23 Jul 2021 00:15 Ta-ch'iu China  0.6
23 Jul 2021 00:15 Beicuo China  0.6
23 Jul 2021 00:15 Guanjing China  0.6
23 Jul 2021 00:15 Cao Yu China  0.6
23 Jul 2021 00:15 Qingfeng China  0.6
23 Jul 2021 00:15 Pingtan China  0.6
20 Jul 2021 16:30 Chixi China  0.6
20 Jul 2021 16:30 Huangchong China  0.6
20 Jul 2021 16:30 Meige China  0.6
20 Jul 2021 16:30 Mashan China  0.6
20 Jul 2021 16:30 Mei-ko China  0.6
20 Jul 2021 16:30 Pingsha China  0.6
20 Jul 2021 16:30 Doumen China  0.6
20 Jul 2021 16:30 Ching-an China  0.5
20 Jul 2021 16:30 Xiaolin China  0.5
20 Jul 2021 12:30 Santouzui China  0.5
20 Jul 2021 12:30 Hsi-t'ou China  0.5
20 Jul 2021 12:30 Lengzilin China  0.5
20 Jul 2021 12:45 Dayang China  0.5
20 Jul 2021 12:45 Guanghai China  0.5
20 Jul 2021 16:15 Tiantou China  0.5
20 Jul 2021 15:30 Tonggu China  0.5
20 Jul 2021 13:00 Doushan China  0.4
22 Jul 2021 23:45 Houtian China  0.4
20 Jul 2021 15:15 Chengcun China  0.4
20 Jul 2021 12:15 Cuihengcun China  0.3
20 Jul 2021 12:15 Min-chung China  0.3
20 Jul 2021 12:15 Wan-ch'ing-sha China  0.3
20 Jul 2021 12:15 Qishan China  0.3
20 Jul 2021 12:15 Cheng'anwei China  0.3
20 Jul 2021 12:15 Ch'i-ao China  0.3
20 Jul 2021 12:15 Xiazha China  0.3
20 Jul 2021 18:30 Yuen Long Hong Kong (China)  0.3
20 Jul 2021 18:30 Tai Po Hong Kong (China)  0.3
20 Jul 2021 18:30 Tai Po Industrial Estate Hong Kong (China)  0.3
20 Jul 2021 18:30 Fung Yuen Hong Kong (China)  0.3
20 Jul 2021 18:30 Dabu Hong Kong (China)  0.3
20 Jul 2021 18:30 Sha Tau Kok China  0.3
20 Jul 2021 18:30 Cheung Kang Hong Kong (China)  0.3
20 Jul 2021 18:30 Imtin China  0.3
20 Jul 2021 18:30 Cheung Wo Hong Kong (China)  0.3
20 Jul 2021 18:30 Pak Sha Au Hong Kong (China)  0.3
20 Jul 2021 18:30 Long Ke Hong Kong (China)  0.3
20 Jul 2021 18:30 Khitschhung China  0.3
21 Jul 2021 22:15 Yingluo China  0.3
21 Jul 2021 22:15 Caotan China  0.3
21 Jul 2021 22:15 Longtousha China  0.3
21 Jul 2021 22:15 Yingzai China  0.3
20 Jul 2021 15:15 Baijiao China  0.3
20 Jul 2021 15:15 San-tsao China  0.3
20 Jul 2021 15:15 Nanping China  0.3
20 Jul 2021 15:15 Macau Macau (China)  0.3
20 Jul 2021 15:15 Taipa Macau (China)  0.3
20 Jul 2021 15:15 Coloane Macau (China)  0.3
20 Jul 2021 18:30 Cheung Sha Wan Hong Kong (China)  0.3
20 Jul 2021 18:30 Tsz Wa Chan Hong Kong (China)  0.3
20 Jul 2021 18:30 Yau Ma Po Hong Kong (China)  0.3
20 Jul 2021 18:30 Sai Kung Hong Kong (China)  0.3
20 Jul 2021 16:30 Huangge China  0.3
20 Jul 2021 16:30 Jiang'ouwei China  0.3
20 Jul 2021 16:30 Fumunchai China  0.3
20 Jul 2021 16:30 Fumuntschai China  0.3
20 Jul 2021 16:30 Baihao China  0.3
20 Jul 2021 16:30 Taiping China  0.3
20 Jul 2021 16:30 Sha-ching China  0.3
20 Jul 2021 16:30 Heping China  0.3
23 Jul 2021 10:15 Nanluo China  0.3
23 Jul 2021 10:15 Haitou China  0.3
21 Jul 2021 22:15 Yong'an China  0.3
21 Jul 2021 22:15 Shankou China  0.3
23 Jul 2021 12:00 Haiwei China  0.3
21 Jul 2021 19:45 Bailong China  0.3
21 Jul 2021 19:45 Beimu China  0.3
20 Jul 2021 17:45 Maogang China  0.3
20 Jul 2021 17:45 Heung chau China  0.3
20 Jul 2021 17:15 Fan Kwai Tong Hong Kong (China)  0.3
20 Jul 2021 17:15 Nantou China  0.3
23 Jul 2021 01:30 Ch'i-shui China  0.3
23 Jul 2021 01:30 Haikang China  0.3
23 Jul 2021 03:00 Beihai China  0.2
23 Jul 2021 03:00 Gaode China  0.2
23 Jul 2021 03:00 Guchengling China  0.2
20 Jul 2021 18:15 Dapeng China  0.2
20 Jul 2021 18:15 Taipang China  0.2
20 Jul 2021 18:15 Shagang China  0.2
20 Jul 2021 18:15 Aotou China  0.2
23 Jul 2021 01:30 Liu-sha-ying China  0.2
20 Jul 2021 17:45 Chiu-chieh China  0.2
20 Jul 2021 17:45 Shekou China  0.2
20 Jul 2021 17:45 Lau Fau Sha Hong Kong (China)  0.2
20 Jul 2021 17:45 Ngau Kwu Long Hong Kong (China)  0.2
20 Jul 2021 17:45 Castle Peak New Town Hong Kong (China)  0.2
20 Jul 2021 17:45 Tuen Mun Hong Kong (China)  0.2
22 Jul 2021 22:15 Gongche China  0.2
22 Jul 2021 22:15 Maoling China  0.2
22 Jul 2021 22:15 Kangxiling China  0.2
22 Jul 2021 22:15 Longmen China  0.2
22 Jul 2021 22:15 Jiuya China  0.2
22 Jul 2021 22:15 Dafanpo China  0.2
22 Jul 2021 22:15 Pingshan China  0.2
20 Jul 2021 15:45 Shangyang China  0.2
20 Jul 2021 17:30 Tai Long Wan Hong Kong (China)  0.2
20 Jul 2021 17:00 Luzui China  0.2
23 Jul 2021 01:15 Shuiwei China  0.2
23 Jul 2021 01:30 Liusha China  0.2
23 Jul 2021 01:30 Mai-ch'en-hsu China  0.2
23 Jul 2021 09:15 Basuo China  0.2
23 Jul 2021 09:15 Beili China  0.2
23 Jul 2021 09:15 Duntou China  0.2
23 Jul 2021 09:15 Changhua China  0.2
20 Jul 2021 17:30 Ham Tin Hong Kong (China)  0.2
20 Jul 2021 17:00 Hsia-yung China  0.2
20 Jul 2021 17:00 Renshan China  0.2
20 Jul 2021 17:30 Lajiwei China  0.2
20 Jul 2021 17:45 Yuen Long Hong Kong (China)  0.2
20 Jul 2021 17:45 Sz Pak Hong Kong (China)  0.2
20 Jul 2021 16:45 Jen-shan China  0.2
20 Jul 2021 17:30 Fanhe China  0.2
20 Jul 2021 17:30 Pinghai China  0.2
23 Jul 2021 02:15 Maichen China  0.2
23 Jul 2021 09:15 Gancheng China  0.2
23 Jul 2021 09:15 Longyou China  0.2
23 Jul 2021 09:45 Banqiao China  0.2
23 Jul 2021 09:45 Lingtou China  0.2
20 Jul 2021 14:45 Wanshan China  0.2
23 Jul 2021 01:15 Xinxing China  0.2
22 Jul 2021 06:30 Guanjing China  0.2
22 Jul 2021 06:30 Hsi-ch'ang-hsu China  0.2
22 Jul 2021 06:30 Hsi-ch'ang China  0.2
22 Jul 2021 06:30 Shagang China  0.2
23 Jul 2021 02:15 Qiaotou China  0.2
23 Jul 2021 09:45 Foluo China  0.2
20 Jul 2021 21:45 Xiuying China  0.2
20 Jul 2021 21:45 Haikou China  0.2
23 Jul 2021 01:00 Guangcun China  0.2
20 Jul 2021 17:15 Houmen China  0.2
20 Jul 2021 17:30 Magong China  0.2
20 Jul 2021 17:30 Jizhongtuo China  0.2
23 Jul 2021 02:45 Haian China  0.2
20 Jul 2021 21:45 Boshegang China  0.2
22 Jul 2021 04:30 Dangjiang China  0.2
22 Jul 2021 04:30 Qianjiang China  0.2
21 Jul 2021 06:15 Ma-hsieh China  0.2
21 Jul 2021 06:15 Badongxu China  0.2
21 Jul 2021 06:15 Potou China  0.2
21 Jul 2021 06:15 Bengtang China  0.2
21 Jul 2021 06:15 Baisha China  0.2
21 Jul 2021 06:15 Shaoyao China  0.2
21 Jul 2021 06:15 Xingyou China  0.2
21 Jul 2021 06:15 Huangpo China  0.2
21 Jul 2021 06:15 Chiu-wu-ch'uan China  0.2
20 Jul 2021 16:45 Tai Tam Hong Kong (China)  0.2
20 Jul 2021 16:45 Stanley Hong Kong (China)  0.2
20 Jul 2021 16:45 San Wan Ho Shau Hong Kong (China)  0.2
20 Jul 2021 16:45 Yau Tong Hong Kong (China)  0.2
20 Jul 2021 16:45 Rennie's Mill Hong Kong (China)  0.2
20 Jul 2021 16:45 A Kung Ngam Hong Kong (China)  0.2
20 Jul 2021 16:45 Chai Wan Hong Kong (China)  0.2
20 Jul 2021 16:45 Sau Mau Ping Hong Kong (China)  0.2
20 Jul 2021 16:45 Hok Tsui Wan Hong Kong (China)  0.2
20 Jul 2021 16:45 Chik Sha Hong Kong (China)  0.2
20 Jul 2021 16:45 Hang Hau Hong Kong (China)  0.2
20 Jul 2021 16:45 Tei Tong Tsui Hong Kong (China)  0.2
20 Jul 2021 16:45 Tai Wan Tau Hong Kong (China)  0.2
23 Jul 2021 03:00 Puqian China  0.2
23 Jul 2021 02:45 Longtang China  0.2
20 Jul 2021 17:15 Gangkou China  0.2
20 Jul 2021 16:45 Aberdeen Hong Kong (China)  0.2
20 Jul 2021 16:45 Won Hang Hong Kong (China)  0.2
20 Jul 2021 16:45 Tain Sha Tsui Hong Kong (China)  0.2
20 Jul 2021 16:45 Central Hong Kong (China)  0.2
20 Jul 2021 16:45 Kowloon Hong Kong (China)  0.2
20 Jul 2021 16:45 Wan Chai Hong Kong (China)  0.2
20 Jul 2021 16:45 Chung Hom Kok Hong Kong (China)  0.2
20 Jul 2021 16:45 North Point Hong Kong (China)  0.2
20 Jul 2021 16:45 Chek Chue Hong Kong (China)  0.2
20 Jul 2021 16:45 Crocodile Hill Hong Kong (China)  0.2
20 Jul 2021 15:15 Nam Wan Hong Kong (China)  0.1
20 Jul 2021 15:15 Hoi Pa Hong Kong (China)  0.1
20 Jul 2021 15:15 Lo Tik Wan Hong Kong (China)  0.1
20 Jul 2021 15:15 Tsuen Wan Hong Kong (China)  0.1
20 Jul 2021 15:15 Lo So Shing Hong Kong (China)  0.1
20 Jul 2021 15:15 Ha Kwai Chung Hong Kong (China)  0.1
20 Jul 2021 15:15 Pok Fu Lam Hong Kong (China)  0.1
20 Jul 2021 15:15 Wa Fu Estate Hong Kong (China)  0.1
20 Jul 2021 15:15 Kennedy Town Hong Kong (China)  0.1
20 Jul 2021 19:45 Diancheng China  0.1
20 Jul 2021 19:45 Rudong China  0.1
23 Jul 2021 03:00 Qianshan China  0.1
23 Jul 2021 04:30 Taiping China  0.1
23 Jul 2021 04:30 Xianmai China  0.1
23 Jul 2021 04:30 Longshe China  0.1
23 Jul 2021 04:30 Dongli China  0.1
20 Jul 2021 23:15 Jiesheng China  0.1
20 Jul 2021 23:15 Tianqian China  0.1
20 Jul 2021 23:15 Zhelang China  0.1
22 Jul 2021 06:45 Hsi-niu-chiao China  0.1
21 Jul 2021 00:15 Shanwei China  0.1
23 Jul 2021 05:00 Dongshan China  0.1
23 Jul 2021 05:00 Tung-li China  0.1
23 Jul 2021 08:00 Chia-ho-ts'un Taiwan  0.1
23 Jul 2021 08:00 Fang-shan Taiwan  0.1
23 Jul 2021 08:00 Feng-chiang Taiwan  0.1
23 Jul 2021 08:00 She-liao Taiwan  0.1
23 Jul 2021 08:00 Che-cheng Taiwan  0.1
23 Jul 2021 09:00 Liu-chiu Hsu Taiwan  0.1
23 Jul 2021 08:15 Maobitou Taiwan  0.1
23 Jul 2021 08:15 Ta-kuang Taiwan  0.1
23 Jul 2021 03:30 T'ien-ch'ien-ts'o Taiwan  0.1
23 Jul 2021 03:30 Shui-ti-liao Taiwan  0.1
20 Jul 2021 13:45 Pucheng China  0.1
20 Jul 2021 13:45 Sha-fan-chieh China  0.1
20 Jul 2021 13:45 Jinxiang China  0.1
23 Jul 2021 03:45 Hou-ta-ts'o Taiwan  0.1
23 Jul 2021 03:45 Tung-chiang Taiwan  0.1
23 Jul 2021 03:45 Wu-lung Taiwan  0.1
23 Jul 2021 07:15 Ta-lin-pu Taiwan  0.1
23 Jul 2021 07:15 I-jen Taiwan  0.1
23 Jul 2021 12:00 Kao-hsiung Taiwan  0.1
23 Jul 2021 12:00 Kuei-shan Taiwan  0.1
23 Jul 2021 12:00 Hung-nan-li Taiwan  0.1
20 Jul 2021 23:15 Jieshi China  0.1
20 Jul 2021 23:15 Hudong China  0.1
23 Jul 2021 12:00 K'o-tzu-liao Taiwan  0.1
23 Jul 2021 12:00 Yung-an-ts'un Taiwan  0.1
23 Jul 2021 04:45 Dongjian China  0.1
23 Jul 2021 04:45 Houhu China  0.1
23 Jul 2021 04:45 Houhai China  0.1
20 Jul 2021 23:45 Donghong China  0.1
20 Jul 2021 23:45 Jinghai China  0.1
20 Jul 2021 23:45 Ch'ao-yang-hsien China  0.1
20 Jul 2021 23:45 Haimen China  0.1
20 Jul 2021 23:45 Dahao China  0.1
20 Jul 2021 23:45 Aotou China  0.1
20 Jul 2021 23:45 Daitou China  0.1
21 Jul 2021 00:15 Shantou China  0.1
21 Jul 2021 00:15 Guangao China  0.1
23 Jul 2021 12:00 Hai-pu Taiwan  0.1
20 Jul 2021 23:30 Jiazi China  0.1
23 Jul 2021 01:15 Meilu China  0.1
23 Jul 2021 01:15 Hai-lu China  0.1
23 Jul 2021 12:00 Chung-ho Taiwan  0.1
21 Jul 2021 07:00 Siwei China  0.1
21 Jul 2021 07:00 Houzhai China  0.1
20 Jul 2021 16:45 Shenquan China  0.1
20 Jul 2021 15:45 Guhuai China  0.1
20 Jul 2021 15:45 Chiang-t'ien China  0.1
20 Jul 2021 15:45 Chang-chiang China  0.1
23 Jul 2021 00:45 Shuidong China  0.1
23 Jul 2021 00:30 Ch'i-ching China  0.1
23 Jul 2021 00:30 Dianbai China  0.1
23 Jul 2021 00:30 Danchang China  0.1
21 Jul 2021 14:00 Huanglong China  0.1
21 Jul 2021 14:00 Zhelin China  0.1
23 Jul 2021 01:00 Magang China  0.1
22 Jul 2021 14:45 Huangwu China  0.1
22 Jul 2021 14:45 Nayan China  0.1
21 Jul 2021 15:00 Shenao China  0.1
21 Jul 2021 15:00 Nanao China  0.1
21 Jul 2021 15:00 Chelim China  0.1
21 Jul 2021 15:00 Gongkou China  0.1