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 HWRF
Exposed countries China
Exposed population 3 thousand in Category 1 or higher
Maximum wind speed 104 km/h
Maximum storm surge 0.6 m (23 Jul 15:15 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 104 km/h 0.6 m 228 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 3.8 million 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 
CAT. 1China2,698 
Tropical StormChina3,753,346 

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 18:00 130 3 thousand
- - - - China
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 20 Jul 2021 18:00 UTC
LevelCountryPopulation 
500-750 mmChina1,693 
250-500 mmChina2,910,429 
100-250 mmChina, Vietnam17,876,436
+
China17,850,771 
Vietnam25,664 
50-100 mmChina, Vietnam, Laos19,569,228
+
China19,328,076 
Vietnam239,994 
Laos1,157 

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 18:00 624 20.8 million
- - China, Vietnam, Laos




Impact estimation for the next 72h
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StormSurge

0.6 m

The maximum Storm surge height is  0.6m in San Shah, China. This height is estimated for 23 Jul 2021 15:15 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 18:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
23 Jul 2021 15:15 San Shah China  0.6
23 Jul 2021 15:15 Gaoshan China  0.6
23 Jul 2021 15:15 Ta-ch'iu China  0.6
23 Jul 2021 15:15 Beicuo China  0.6
23 Jul 2021 15:15 Guanjing China  0.6
23 Jul 2021 15:15 Cao Yu China  0.6
23 Jul 2021 15:15 Qingfeng China  0.6
23 Jul 2021 15:15 Pingtan China  0.6
20 Jul 2021 18:00 Beidou China  0.6
20 Jul 2021 18:00 Chen-hai China  0.6
20 Jul 2021 18:00 Shen-ching China  0.6
20 Jul 2021 18:00 Chixi China  0.5
20 Jul 2021 18:00 Huangchong China  0.5
20 Jul 2021 18:00 Meige China  0.5
20 Jul 2021 18:00 Mashan China  0.5
20 Jul 2021 18:00 Mei-ko China  0.5
20 Jul 2021 18:00 Pingsha China  0.5
20 Jul 2021 18:00 Doumen China  0.5
20 Jul 2021 18:00 Ching-an China  0.5
20 Jul 2021 18:00 Xiaolin China  0.5
23 Jul 2021 03:30 Paipu China  0.5
23 Jul 2021 03:30 Baimajing China  0.5
23 Jul 2021 03:30 Hsin-ying China  0.5
23 Jul 2021 03:30 Eman China  0.5
23 Jul 2021 03:30 Taan China  0.5
23 Jul 2021 03:30 Hsin-chou China  0.5
23 Jul 2021 15:15 Houtian China  0.4
20 Jul 2021 21:45 Jiangcheng China  0.4
20 Jul 2021 21:45 Baipu China  0.4
20 Jul 2021 21:45 Dagou China  0.4
20 Jul 2021 21:45 Hsin-chou China  0.4
20 Jul 2021 19:45 Diancheng China  0.4
20 Jul 2021 19:45 Rudong China  0.4
20 Jul 2021 18:00 Dayang China  0.4
20 Jul 2021 18:00 Guanghai China  0.4
20 Jul 2021 18:00 Doushan China  0.4
20 Jul 2021 18:00 Tiantou China  0.4
20 Jul 2021 18:00 Tonggu China  0.4
20 Jul 2021 19:15 Chengcun China  0.4
20 Jul 2021 19:15 Santouzui China  0.4
20 Jul 2021 19:15 Hsi-t'ou China  0.4
20 Jul 2021 19:15 Lengzilin China  0.4
20 Jul 2021 19:15 Pinggang China  0.4
20 Jul 2021 18:00 Shalan China  0.3
20 Jul 2021 18:00 Dalangwan 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
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 19:45 Shangyang China  0.3
20 Jul 2021 18:30 Cuihengcun China  0.3
20 Jul 2021 18:30 Min-chung China  0.3
20 Jul 2021 18:30 Wan-ch'ing-sha China  0.3
20 Jul 2021 18:30 Qishan China  0.3
20 Jul 2021 18:30 Cheng'anwei China  0.3
20 Jul 2021 18:30 Ch'i-ao China  0.3
20 Jul 2021 19:00 Xiazha China  0.3
22 Jul 2021 12:30 Bailong China  0.3
22 Jul 2021 12:30 Beimu China  0.3
22 Jul 2021 12:30 Yong'an China  0.3
22 Jul 2021 12:30 Shankou China  0.3
22 Jul 2021 12:30 Yingluo China  0.3
20 Jul 2021 21:15 Luewei China  0.3
20 Jul 2021 18:00 Heping China  0.3
20 Jul 2021 18:00 Huangge China  0.3
20 Jul 2021 18:00 Jiang'ouwei China  0.3
20 Jul 2021 18:00 Fumunchai China  0.3
20 Jul 2021 18:00 Fumuntschai China  0.3
20 Jul 2021 18:00 Baihao China  0.3
20 Jul 2021 18:00 Taiping China  0.3
20 Jul 2021 18:00 Sha-ching China  0.3
20 Jul 2021 18:00 Nanping China  0.3
20 Jul 2021 18:00 Maogang China  0.3
20 Jul 2021 18:00 Macau Macau (China)  0.3
20 Jul 2021 18:00 Heung chau China  0.3
20 Jul 2021 18:00 Fan Kwai Tong Hong Kong (China)  0.3
20 Jul 2021 18:00 Nantou China  0.3
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
20 Jul 2021 18:00 Shadi China  0.2
21 Jul 2021 04:30 Baijiao China  0.2
21 Jul 2021 04:30 San-tsao China  0.2
21 Jul 2021 04:30 Taipa Macau (China)  0.2
21 Jul 2021 04:30 Coloane Macau (China)  0.2
20 Jul 2021 18:00 Chiu-chieh China  0.2
20 Jul 2021 18:00 Shekou China  0.2
20 Jul 2021 18:00 Lau Fau Sha Hong Kong (China)  0.2
20 Jul 2021 18:00 Ngau Kwu Long Hong Kong (China)  0.2
20 Jul 2021 18:00 Castle Peak New Town Hong Kong (China)  0.2
20 Jul 2021 18:00 Tuen Mun Hong Kong (China)  0.2
20 Jul 2021 18:00 Luzui 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 18:00 Tai Long Wan Hong Kong (China)  0.2
22 Jul 2021 13:45 Gongche China  0.2
22 Jul 2021 13:45 Maoling China  0.2
22 Jul 2021 13:45 Kangxiling China  0.2
22 Jul 2021 13:45 Longmen China  0.2
22 Jul 2021 13:45 Jiuya China  0.2
22 Jul 2021 13:45 Dafanpo China  0.2
22 Jul 2021 13:45 Pingshan China  0.2
21 Jul 2021 00:15 Ma-hsieh China  0.2
21 Jul 2021 00:15 Badongxu China  0.2
21 Jul 2021 00:15 Potou China  0.2
21 Jul 2021 00:15 Bengtang China  0.2
21 Jul 2021 00:15 Baisha China  0.2
21 Jul 2021 00:15 Shaoyao China  0.2
21 Jul 2021 00:15 Xingyou China  0.2
21 Jul 2021 00:15 Huangpo China  0.2
21 Jul 2021 00:15 Chiu-wu-ch'uan China  0.2
20 Jul 2021 18:00 Ham Tin Hong Kong (China)  0.2
21 Jul 2021 23:15 Caotan China  0.2
21 Jul 2021 23:15 Longtousha China  0.2
21 Jul 2021 23:15 Yingzai China  0.2
20 Jul 2021 18:00 Yuen Long Hong Kong (China)  0.2
20 Jul 2021 18:00 Sz Pak Hong Kong (China)  0.2
23 Jul 2021 06:45 Nanluo China  0.2
23 Jul 2021 06:45 Haitou China  0.2
23 Jul 2021 09:15 Gancheng China  0.2
23 Jul 2021 09:15 Longyou China  0.2
22 Jul 2021 22:15 Ch'i-shui China  0.2
22 Jul 2021 22:15 Haikang China  0.2
22 Jul 2021 22:15 Liu-sha-ying China  0.2
23 Jul 2021 07:00 Haiwei China  0.2
22 Jul 2021 21:45 Shuiwei China  0.2
22 Jul 2021 21:45 Liusha China  0.2
22 Jul 2021 21:45 Mai-ch'en-hsu China  0.2
23 Jul 2021 09:15 Banqiao China  0.2
20 Jul 2021 22:30 Hsia-yung China  0.2
23 Jul 2021 04:00 Taiping China  0.2
23 Jul 2021 04:00 Xianmai China  0.2
23 Jul 2021 04:00 Longshe China  0.2
23 Jul 2021 04:00 Dongli China  0.2
20 Jul 2021 18:00 Lajiwei China  0.2
23 Jul 2021 09:45 Lingtou China  0.2
20 Jul 2021 18:00 Renshan China  0.2
20 Jul 2021 18:00 Jen-shan China  0.2
20 Jul 2021 18:00 Fanhe China  0.2
20 Jul 2021 18:00 Pinghai China  0.2
22 Jul 2021 11:00 Gaode China  0.2
22 Jul 2021 11:00 Guchengling China  0.2
22 Jul 2021 22:00 Maichen China  0.2
23 Jul 2021 03:30 Dongshan China  0.2
23 Jul 2021 03:45 Tung-li China  0.2
22 Jul 2021 08:00 Hsi-ch'ang-hsu China  0.2
22 Jul 2021 08:00 Hsi-ch'ang China  0.2
22 Jul 2021 08:00 Shagang China  0.2
22 Jul 2021 08:00 Beihai China  0.2
22 Jul 2021 08:00 Dangjiang China  0.2
22 Jul 2021 08:00 Qianjiang China  0.2
21 Jul 2021 00:30 Houmen China  0.2
23 Jul 2021 12:45 Foluo China  0.1
23 Jul 2021 18:00 Yung-lung Taiwan  0.1
23 Jul 2021 18:00 Hsin-chiang Taiwan  0.1
23 Jul 2021 18:00 Fu-hsing Taiwan  0.1
23 Jul 2021 18:00 Pu-tai Taiwan  0.1
23 Jul 2021 18:00 Chang-t'an Taiwan  0.1
23 Jul 2021 18:00 Wu-nan Taiwan  0.1
20 Jul 2021 23:45 Magong China  0.1
20 Jul 2021 23:45 Jizhongtuo China  0.1
21 Jul 2021 04:00 Wanshan China  0.1
23 Jul 2021 18:00 Chia-ho-ts'un Taiwan  0.1
23 Jul 2021 18:00 Fang-shan Taiwan  0.1
23 Jul 2021 18:00 Feng-chiang Taiwan  0.1
23 Jul 2021 18:00 She-liao Taiwan  0.1
23 Jul 2021 18:00 Che-cheng Taiwan  0.1
22 Jul 2021 21:45 Xinxing China  0.1
23 Jul 2021 17:45 Liu-chiu Hsu Taiwan  0.1
21 Jul 2021 06:15 Shuidong China  0.1
21 Jul 2021 06:15 Ch'i-ching China  0.1
21 Jul 2021 06:15 Dianbai China  0.1
21 Jul 2021 06:15 Danchang China  0.1
21 Jul 2021 06:15 Magang China  0.1
21 Jul 2021 00:15 Gangkou China  0.1
23 Jul 2021 18:00 Maobitou Taiwan  0.1
23 Jul 2021 18:00 Ta-kuang Taiwan  0.1
23 Jul 2021 18:00 T'ien-ch'ien-ts'o Taiwan  0.1
23 Jul 2021 18:00 Shui-ti-liao Taiwan  0.1
23 Jul 2021 17:45 Ta-lin-pu Taiwan  0.1
23 Jul 2021 17:45 Hou-ta-ts'o Taiwan  0.1
23 Jul 2021 17:45 I-jen Taiwan  0.1
23 Jul 2021 17:45 Tung-chiang Taiwan  0.1
23 Jul 2021 17:45 Wu-lung Taiwan  0.1
22 Jul 2021 21:45 Qiaotou 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
23 Jul 2021 18:00 Kao-hsiung Taiwan  0.1
23 Jul 2021 17:45 Kuei-shan Taiwan  0.1
23 Jul 2021 18:00 Hung-nan-li Taiwan  0.1
23 Jul 2021 18:00 Yung-an-ts'un Taiwan  0.1
23 Jul 2021 17:15 K'o-tzu-liao Taiwan  0.1
21 Jul 2021 00:00 Shanwei China  0.1
23 Jul 2021 18:00 Hai-pu Taiwan  0.1
22 Jul 2021 22:30 Xiuying China  0.1
23 Jul 2021 18:00 Chung-ho Taiwan  0.1
21 Jul 2021 01:00 Tei Tong Tsui Hong Kong (China)  0.1
21 Jul 2021 01:00 Tai Wan Tau Hong Kong (China)  0.1
23 Jul 2021 18:00 Hsia-lun Taiwan  0.1
23 Jul 2021 18:00 Sa-ti Taiwan  0.1
23 Jul 2021 18:00 Hai-kou Taiwan  0.1
23 Jul 2021 18:00 Chung-ch'i Taiwan  0.1
22 Jul 2021 21:15 Guangcun China  0.1
21 Jul 2021 16:15 Aberdeen Hong Kong (China)  0.1
21 Jul 2021 16:15 Won Hang Hong Kong (China)  0.1
21 Jul 2021 16:15 Tain Sha Tsui Hong Kong (China)  0.1
21 Jul 2021 16:15 Central Hong Kong (China)  0.1
21 Jul 2021 16:15 Kowloon Hong Kong (China)  0.1
21 Jul 2021 16:15 Wan Chai Hong Kong (China)  0.1
21 Jul 2021 16:15 Chung Hom Kok Hong Kong (China)  0.1
21 Jul 2021 16:15 North Point Hong Kong (China)  0.1
21 Jul 2021 16:15 Chek Chue Hong Kong (China)  0.1
21 Jul 2021 16:15 Crocodile Hill Hong Kong (China)  0.1
21 Jul 2021 16:15 Tai Tam Hong Kong (China)  0.1
21 Jul 2021 16:15 Stanley Hong Kong (China)  0.1
21 Jul 2021 16:15 San Wan Ho Shau Hong Kong (China)  0.1
21 Jul 2021 16:15 Yau Tong Hong Kong (China)  0.1
21 Jul 2021 16:15 Rennie's Mill Hong Kong (China)  0.1
21 Jul 2021 16:15 A Kung Ngam Hong Kong (China)  0.1
21 Jul 2021 16:15 Chai Wan Hong Kong (China)  0.1
21 Jul 2021 16:15 Sau Mau Ping Hong Kong (China)  0.1
21 Jul 2021 16:15 Hok Tsui Wan Hong Kong (China)  0.1
21 Jul 2021 16:15 Chik Sha Hong Kong (China)  0.1
21 Jul 2021 16:15 Hang Hau Hong Kong (China)  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 17:30 Dongjian China  0.1
23 Jul 2021 17:30 Houhu China  0.1
23 Jul 2021 17:30 Houhai China  0.1
22 Jul 2021 22:30 Haian China  0.1
23 Jul 2021 18:00 Chiang-chun Taiwan  0.1
21 Jul 2021 07:00 Ch'ao-yang-hsien China  0.1
21 Jul 2021 07:00 Haimen China  0.1
21 Jul 2021 07:00 Shantou China  0.1
21 Jul 2021 07:00 Dahao China  0.1
21 Jul 2021 07:00 Aotou China  0.1
21 Jul 2021 07:00 Daitou China  0.1
21 Jul 2021 07:00 Guangao China  0.1
22 Jul 2021 22:30 Haikou China  0.1
21 Jul 2021 12:45 Siwei China  0.1
21 Jul 2021 12:45 Huanglong China  0.1
21 Jul 2021 12:45 Houzhai China  0.1
21 Jul 2021 12:45 Zhelin China  0.1
21 Jul 2021 06:30 Donghong China  0.1
21 Jul 2021 06:30 Jinghai 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 22:30 Boshegang China  0.1
20 Jul 2021 23:15 Jieshi China  0.1
20 Jul 2021 23:15 Hudong China  0.1
23 Jul 2021 18:00 San-hsing Taiwan  0.1
23 Jul 2021 18:00 T'ai-hsi Taiwan  0.1
22 Jul 2021 22:30 Longtang China  0.1
22 Jul 2021 07:45 Guanjing China  0.1
22 Jul 2021 23:15 Puqian China  0.1
21 Jul 2021 12:30 Shenao China  0.1
21 Jul 2021 12:30 Nanao China  0.1
21 Jul 2021 12:30 Chelim China  0.1
21 Jul 2021 12:30 Gongkou China  0.1
23 Jul 2021 17:00 Huangwu China  0.1
23 Jul 2021 17:00 Nayan China  0.1
21 Jul 2021 18:45 Shenquan China  0.1
21 Jul 2021 13:45 Hsing-ch'en China  0.1
21 Jul 2021 13:45 Chendai China  0.1
21 Jul 2021 13:45 Huqiu China  0.1
21 Jul 2021 13:45 Wutian China  0.1
21 Jul 2021 13:45 Chengguanzhen China  0.1
21 Jul 2021 13:45 Guleitou China  0.1
21 Jul 2021 13:45 Gangkou China  0.1
21 Jul 2021 13:45 Hsia-mei China  0.1
23 Jul 2021 17:45 Sha-shan Taiwan  0.1
23 Jul 2021 17:45 Wang-kung Taiwan  0.1