Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China
23 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 HWRF
Exposed countries Vietnam, Laos
Exposed population No people in Category 1 or higher
Maximum wind speed 61 km/h
Maximum storm surge 0.3 m (23 Jul 11:00 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 61 km/h 0.3 m 122 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)

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Wind

137 km/h

Up to 50 thousand can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 23 Jul 2021 06:00 UTC
CategoryCountryPopulation 
Tropical StormVietnam, Laos47,190
+
Vietnam46,889 
Laos300 

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 58 - - - - - - -
GREEN 14 22 Jul 2021 00:00 61 - - - - - - -
GREEN 15 22 Jul 2021 06:00 58 - - - - - - -
GREEN 16 22 Jul 2021 12:00 58 - - - - - - -
GREEN 17 22 Jul 2021 18:00 65 -
- - - - - Vietnam
GREEN 18 23 Jul 2021 00:00 68 -
- - - - - Vietnam
GREEN 19 23 Jul 2021 06:00 76 -
- - - - - Vietnam, Laos
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 23 Jul 2021 06:00 UTC
LevelCountryPopulation 
500-750 mmLaos2,278 
250-500 mmVietnam, Laos, China233,333
+
Vietnam14,109 
Laos219,142 
China82 
100-250 mmVietnam, Laos, China, Thailand8,472,644
+
Vietnam5,649,015 
Laos1,462,168 
China131,773 
Thailand1,229,686 
50-100 mmVietnam, Laos, China, Thailand, Cambodia10,908,667
+
Vietnam5,967,757 
Laos1,050,356 
China907,517 
Thailand2,982,745 
Cambodia290 

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 18:00 175 230 thousand
- - - - China
Blue 14 22 Jul 2021 00:00 285 9 thousand
- - - - China
Blue 15 22 Jul 2021 06:00 146 2 thousand
- - - - China, Vietnam
Blue 16 22 Jul 2021 12:00 139 3 thousand
- - - - Vietnam, China
Blue 17 22 Jul 2021 18:00 166 -
- - - - - Vietnam, Laos
Blue 18 23 Jul 2021 00:00 147 -
- - - - - China, Vietnam, Laos
Blue 19 23 Jul 2021 06:00 635 8.7 million
- - Vietnam, Laos, China, Thailand, Cambodia




Impact estimation for the next 72h
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StormSurge

0.3 m

The maximum Storm surge height is  0.3m in San Shah, China. This height is estimated for 23 Jul 2021 11:00 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 23 Jul 2021 06:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
23 Jul 2021 11:00 San Shah China  0.3
23 Jul 2021 11:00 Gaoshan China  0.3
23 Jul 2021 11:00 Ta-ch'iu China  0.3
23 Jul 2021 11:00 Beicuo China  0.3
23 Jul 2021 11:00 Guanjing China  0.3
23 Jul 2021 11:00 Cao Yu China  0.3
23 Jul 2021 11:00 Qingfeng China  0.3
23 Jul 2021 11:00 Pingtan China  0.3
25 Jul 2021 22:00 Sha-fan-chieh China  0.3
25 Jul 2021 22:00 Jinxiang China  0.3
25 Jul 2021 22:00 Pucheng China  0.3
23 Jul 2021 11:00 Houtian China  0.2
25 Jul 2021 20:45 Shacheng China  0.2
25 Jul 2021 20:45 Xiaguan China  0.2
25 Jul 2021 20:30 Huang-ch'i China  0.2
25 Jul 2021 20:45 Xiahu China  0.2
25 Jul 2021 20:45 Da'ao China  0.2
25 Jul 2021 20:45 Changchun China  0.2
25 Jul 2021 20:45 Luxia China  0.2
25 Jul 2021 20:30 Yacheng China  0.2
25 Jul 2021 20:30 Sansha China  0.2
23 Jul 2021 07:00 Paipu China  0.2
23 Jul 2021 07:00 Baimajing China  0.2
23 Jul 2021 07:00 Hsin-ying China  0.2
23 Jul 2021 07:00 Eman China  0.2
23 Jul 2021 07:00 Taan China  0.2
23 Jul 2021 07:00 Hsin-chou China  0.2
25 Jul 2021 21:00 Wuqu China  0.2
25 Jul 2021 22:15 Bili China  0.2
25 Jul 2021 22:15 Chien-chiang China  0.2
25 Jul 2021 22:15 Anhai China  0.2
25 Jul 2021 22:15 Tung-ch'ung China  0.2
25 Jul 2021 21:30 Xinan China  0.2
25 Jul 2021 22:00 Ting-hai China  0.2
25 Jul 2021 21:45 Ch'ang-t'an-wo Taiwan  0.2
25 Jul 2021 01:45 Tung-tai China  0.1
25 Jul 2021 01:45 Baisheng China  0.1
25 Jul 2021 01:45 Mabi China  0.1
25 Jul 2021 01:45 Guanban China  0.1
25 Jul 2021 01:45 Langqi China  0.1
25 Jul 2021 01:45 Changmen China  0.1
25 Jul 2021 01:45 Fengwo China  0.1
25 Jul 2021 01:45 Yunlong China  0.1
23 Jul 2021 22:45 Wangchuan China  0.1
23 Jul 2021 22:45 Fengting China  0.1
23 Jul 2021 22:45 Dawu China  0.1
23 Jul 2021 22:45 Fengwei China  0.1
23 Jul 2021 22:45 Hsiao-tso China  0.1
23 Jul 2021 22:45 Zhongmen China  0.1
25 Jul 2021 01:45 Tantou China  0.1
25 Jul 2021 01:45 Chin-feng China  0.1
25 Jul 2021 01:45 Wuhang China  0.1
23 Jul 2021 06:00 Yingluo China  0.1
23 Jul 2021 06:00 Caotan China  0.1
23 Jul 2021 06:00 Longtousha China  0.1
23 Jul 2021 06:00 Yingzai China  0.1
23 Jul 2021 23:00 P'u-hsi China  0.1
23 Jul 2021 23:00 P'u-hsi-ch'eng China  0.1
23 Jul 2021 23:00 Meizhou China  0.1
23 Jul 2021 10:30 Bailong China  0.1
23 Jul 2021 10:30 Beimu China  0.1
23 Jul 2021 10:30 Yong'an China  0.1
23 Jul 2021 10:30 Shankou China  0.1
25 Jul 2021 01:15 Chiang-t'ien China  0.1
25 Jul 2021 01:15 Chang-chiang China  0.1
25 Jul 2021 02:00 Guhuai China  0.1
23 Jul 2021 22:00 Lianhe China  0.1
23 Jul 2021 22:00 Ch'ing-hsu Taiwan  0.1
23 Jul 2021 22:00 Shijing China  0.1
23 Jul 2021 22:00 Chin-men Tao Taiwan  0.1
23 Jul 2021 22:00 Yang-chai Taiwan  0.1
23 Jul 2021 22:00 Anhai China  0.1
23 Jul 2021 22:00 Tung-shih China  0.1
23 Jul 2021 22:00 Weitou China  0.1
23 Jul 2021 22:00 Chin-ching China  0.1
25 Jul 2021 17:30 Nanri China  0.1
25 Jul 2021 17:30 Fuye China  0.1
23 Jul 2021 22:00 Chin-men Taiwan  0.1
23 Jul 2021 23:15 Dongsha China  0.1
23 Jul 2021 23:15 Lingchuan China  0.1
23 Jul 2021 23:15 Hushi China  0.1
23 Jul 2021 22:00 Lu-kang Taiwan  0.1
23 Jul 2021 22:00 Ching-shui Taiwan  0.1
24 Jul 2021 23:00 Chiang-k'ou China  0.1
24 Jul 2021 23:00 Daitou China  0.1
24 Jul 2021 23:00 Tangbian China  0.1
24 Jul 2021 23:00 Shicheng China  0.1
24 Jul 2021 23:00 Jiangjing China  0.1
24 Jul 2021 23:00 Gangtou China  0.1
23 Jul 2021 06:30 Basuo China  0.1
23 Jul 2021 06:30 Gancheng China  0.1
23 Jul 2021 06:30 Banqiao China  0.1
23 Jul 2021 06:30 Longyou China  0.1
23 Jul 2021 22:00 Shih-shih China  0.1
23 Jul 2021 22:00 Yakou China  0.1
23 Jul 2021 22:00 Yongning China  0.1
23 Jul 2021 22:00 Shihu China  0.1
23 Jul 2021 22:00 Dongyuan China  0.1
23 Jul 2021 22:00 Hsiang-chih China  0.1
23 Jul 2021 22:00 Zhangban China  0.1
23 Jul 2021 22:00 Qian'an China  0.1
23 Jul 2021 22:00 Chongwu China  0.1
23 Jul 2021 10:00 Haikou China  0.1
23 Jul 2021 10:00 Puqian China  0.1
23 Jul 2021 09:00 Xiuying China  0.1
25 Jul 2021 17:15 Pinghai China  0.1
24 Jul 2021 22:45 Yuxi China  0.1
24 Jul 2021 22:45 Longtian China  0.1
23 Jul 2021 21:45 Hua-hsu Taiwan  0.1
23 Jul 2021 06:15 Duntou China  0.1
23 Jul 2021 06:45 Ch'i-shui China  0.1
23 Jul 2021 06:45 Haikang China  0.1
23 Jul 2021 22:00 Chi-pei Taiwan  0.1
23 Jul 2021 21:30 Wai-an Taiwan  0.1
23 Jul 2021 22:15 Hai huang Taiwan  0.1
23 Jul 2021 22:15 Yuan-li Taiwan  0.1
23 Jul 2021 22:15 Tung-hsiao Taiwan  0.1
23 Jul 2021 22:15 Ch'i-ting Taiwan  0.1
23 Jul 2021 06:45 Guangcun China  0.1
23 Jul 2021 06:45 Xinxing China  0.1
23 Jul 2021 22:00 Ch'ang-an Taiwan  0.1
24 Jul 2021 06:15 Luc Linh Vietnam  0.1
24 Jul 2021 06:15 Nam Dong Vietnam  0.1
23 Jul 2021 12:00 Siwei China  0.1
23 Jul 2021 12:00 Huanglong China  0.1
23 Jul 2021 12:00 Houzhai China  0.1
23 Jul 2021 12:00 Zhelin China  0.1
23 Jul 2021 09:45 Boshegang China  0.1
23 Jul 2021 07:45 Gaode China  0.1
23 Jul 2021 07:45 Guchengling China  0.1
23 Jul 2021 22:00 Chu-kao-wan Taiwan  0.1
23 Jul 2021 07:45 Beihai China  0.1
25 Jul 2021 15:30 Taiping China  0.1
25 Jul 2021 15:30 Xianmai China  0.1
25 Jul 2021 15:30 Longshe China  0.1
25 Jul 2021 15:30 Dongli China  0.1
23 Jul 2021 06:30 Mong Cai Vietnam  0.1
23 Jul 2021 06:30 Jiangpingxu China  0.1
23 Jul 2021 06:30 Jiangping China  0.1
23 Jul 2021 06:30 Wanwei China  0.1
25 Jul 2021 16:15 Dongshan China  0.1
25 Jul 2021 16:00 Tung-li China  0.1
23 Jul 2021 12:30 Huangge China  0.1
23 Jul 2021 12:30 Min-chung China  0.1
23 Jul 2021 12:30 Wan-ch'ing-sha China  0.1
23 Jul 2021 12:30 Jiang'ouwei China  0.1
23 Jul 2021 12:30 Cheng'anwei China  0.1
23 Jul 2021 12:30 Fumunchai China  0.1
23 Jul 2021 12:30 Fumuntschai China  0.1
23 Jul 2021 12:30 Baihao China  0.1
23 Jul 2021 12:30 Taiping China  0.1
23 Jul 2021 12:30 Sha-ching China  0.1
23 Jul 2021 12:30 Heping China  0.1
23 Jul 2021 21:45 Sha-shan Taiwan  0.1
23 Jul 2021 21:45 Wang-kung Taiwan  0.1
23 Jul 2021 22:00 Feng-kuei-li Taiwan  0.1
23 Jul 2021 22:00 P'eng-hu-erh-ts'un Taiwan  0.1
23 Jul 2021 09:30 Qiaotou China  0.1
23 Jul 2021 06:45 Beili China  0.1
23 Jul 2021 06:45 Changhua China  0.1
23 Jul 2021 09:30 Haian China  0.1
23 Jul 2021 07:00 Haiwei China  0.1
23 Jul 2021 07:00 Nanluo China  0.1
23 Jul 2021 07:00 Haitou China  0.1
24 Jul 2021 06:30 Longmen China  0.1
24 Jul 2021 06:30 Dafanpo China  0.1
24 Jul 2021 06:30 Hsi-niu-chiao China  0.1
24 Jul 2021 06:30 Pingshan China  0.1
23 Jul 2021 06:30 Lingtou China  0.1
24 Jul 2021 22:00 Fugong China  0.1
24 Jul 2021 22:00 Haicang China  0.1
24 Jul 2021 22:00 Gangwei China  0.1
24 Jul 2021 22:00 Songyu China  0.1
24 Jul 2021 22:00 Hsing-lin China  0.1
24 Jul 2021 22:00 Xucuo China  0.1
24 Jul 2021 22:00 Gulangyu China  0.1
24 Jul 2021 22:00 Xiamen China  0.1
24 Jul 2021 22:00 Chen-hai China  0.1
24 Jul 2021 22:00 Daomei China  0.1
24 Jul 2021 22:00 Dianqian China  0.1
24 Jul 2021 22:00 Jiangtou China  0.1
24 Jul 2021 22:00 Zhenhai China  0.1
24 Jul 2021 22:00 Hecuo China  0.1
24 Jul 2021 22:00 Liuwudian China  0.1
23 Jul 2021 22:00 Ch'eng-ch'ien Taiwan  0.1
23 Jul 2021 11:45 Dahao China  0.1
23 Jul 2021 11:45 Aotou China  0.1
23 Jul 2021 11:45 Daitou China  0.1
23 Jul 2021 11:45 Guangao China  0.1
24 Jul 2021 06:45 Dang Noi Vietnam  0.1
24 Jul 2021 06:45 Dam Ha Vietnam  0.1
23 Jul 2021 10:00 Longtang China  0.1