Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China
23 Jul 2021 00 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, China, Laos
Exposed population No people in Category 1 or higher
Maximum wind speed 68 km/h
Maximum storm surge 0.3 m (23 Jul 13:15 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 68 km/h 0.3 m 147 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 180 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 00:00 UTC
CategoryCountryPopulation 
Tropical StormVietnam, China, Laos183,423
+
Vietnam183,036 
China195 
Laos191 

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 00:00 101 -
- - - - - Vietnam, China, Laos
Download:





Impact estimation for the next 72h
TOP

Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 23 Jul 2021 00:00 UTC
LevelCountryPopulation 
500-750 mmVietnam, Laos276,680
+
Vietnam275,267 
Laos1,412 
250-500 mmVietnam, Laos, China527,118
+
Vietnam405,311 
China6,192 
Laos115,614 
100-250 mmChina, Vietnam, Laos, Thailand6,180,106
+
Vietnam4,258,376 
China1,103,603 
Laos810,351 
Thailand7,775 
50-100 mmVietnam, China, Laos, Thailand, Cambodia9,571,307
+
Vietnam6,491,051 
China1,331,296 
Laos921,032 
Thailand827,035 
Cambodia891 

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 00:00 718 7 million
- - Vietnam, China, Laos, 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 13:15 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 23 Jul 2021 00:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
23 Jul 2021 13:15 San Shah China  0.3
23 Jul 2021 13:15 Gaoshan China  0.3
23 Jul 2021 13:15 Ta-ch'iu China  0.3
23 Jul 2021 13:15 Beicuo China  0.3
23 Jul 2021 13:15 Guanjing China  0.3
23 Jul 2021 13:15 Cao Yu China  0.3
23 Jul 2021 13:15 Qingfeng China  0.3
23 Jul 2021 13:15 Pingtan China  0.3
25 Jul 2021 05:00 Sha-fan-chieh China  0.2
25 Jul 2021 05:00 Jinxiang China  0.2
25 Jul 2021 05:00 Pucheng China  0.2
24 Jul 2021 12:00 Bailong China  0.2
24 Jul 2021 12:00 Beimu China  0.2
24 Jul 2021 12:00 Yong'an China  0.2
24 Jul 2021 12:00 Shankou China  0.2
24 Jul 2021 12:00 Yingluo China  0.2
23 Jul 2021 15:30 Houtian China  0.2
25 Jul 2021 05:45 Shacheng China  0.2
25 Jul 2021 05:45 Xiaguan China  0.2
25 Jul 2021 06:00 Huang-ch'i China  0.2
25 Jul 2021 08:15 Xiahu China  0.2
25 Jul 2021 08:15 Da'ao China  0.2
25 Jul 2021 08:15 Changchun China  0.2
25 Jul 2021 08:15 Luxia China  0.2
25 Jul 2021 15:45 Taiping China  0.2
25 Jul 2021 15:45 Xianmai China  0.2
25 Jul 2021 15:45 Longshe China  0.2
25 Jul 2021 15:45 Dongli China  0.2
25 Jul 2021 05:30 Yacheng China  0.2
25 Jul 2021 05:30 Sansha China  0.2
24 Jul 2021 06:15 Luc Linh Vietnam  0.2
24 Jul 2021 06:15 Nam Dong Vietnam  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 15:45 Tung-li China  0.2
25 Jul 2021 15:45 Dongshan China  0.2
24 Jul 2021 11:00 Caotan China  0.2
24 Jul 2021 11:00 Longtousha China  0.1
25 Jul 2021 05:45 Wuqu China  0.1
25 Jul 2021 07:30 Tung-ch'ung China  0.1
25 Jul 2021 07:30 Xinan China  0.1
25 Jul 2021 08:00 Bili China  0.1
25 Jul 2021 08:00 Chien-chiang China  0.1
25 Jul 2021 08:00 Anhai China  0.1
25 Jul 2021 08:00 Ting-hai China  0.1
25 Jul 2021 08:00 Wangchuan China  0.1
25 Jul 2021 08:00 Fengting China  0.1
25 Jul 2021 08:00 Dawu China  0.1
25 Jul 2021 08:00 Fengwei China  0.1
25 Jul 2021 08:00 Hsiao-tso China  0.1
25 Jul 2021 08:00 Zhongmen China  0.1
25 Jul 2021 08:00 P'u-hsi China  0.1
25 Jul 2021 08:00 P'u-hsi-ch'eng China  0.1
25 Jul 2021 08:00 Meizhou China  0.1
25 Jul 2021 08:30 Ch'ang-t'an-wo Taiwan  0.1
23 Jul 2021 02:00 Ch'i-shui China  0.1
23 Jul 2021 02:00 Haikang China  0.1
23 Jul 2021 05:15 Yingzai China  0.1
25 Jul 2021 08:15 Dongsha China  0.1
25 Jul 2021 08:15 Lingchuan China  0.1
25 Jul 2021 08:15 Hushi China  0.1
25 Jul 2021 09:15 Yuxi China  0.1
25 Jul 2021 09:15 Tangbian China  0.1
25 Jul 2021 09:15 Jiangjing China  0.1
25 Jul 2021 09:15 Longtian China  0.1
25 Jul 2021 09:15 Gangtou China  0.1
25 Jul 2021 08:45 Tung-tai China  0.1
25 Jul 2021 08:45 Baisheng China  0.1
25 Jul 2021 08:45 Mabi China  0.1
25 Jul 2021 08:45 Guanban China  0.1
25 Jul 2021 09:30 Chiang-k'ou China  0.1
25 Jul 2021 09:30 Daitou China  0.1
25 Jul 2021 09:30 Shicheng China  0.1
24 Jul 2021 14:00 Langqi China  0.1
24 Jul 2021 14:00 Changmen China  0.1
24 Jul 2021 14:00 Fengwo China  0.1
24 Jul 2021 14:00 Yunlong China  0.1
24 Jul 2021 14:00 Tantou China  0.1
25 Jul 2021 09:00 Chin-feng China  0.1
25 Jul 2021 09:00 Wuhang China  0.1
25 Jul 2021 09:30 Nanri China  0.1
25 Jul 2021 09:30 Fuye China  0.1
25 Jul 2021 15:15 Dongjian China  0.1
25 Jul 2021 15:15 Houhu China  0.1
25 Jul 2021 15:15 Bengtang China  0.1
25 Jul 2021 15:15 Houhai China  0.1
25 Jul 2021 09:15 Chiang-t'ien China  0.1
25 Jul 2021 09:15 Chang-chiang China  0.1
23 Jul 2021 11:00 Mong Cai Vietnam  0.1
23 Jul 2021 11:00 Jiangpingxu China  0.1
23 Jul 2021 11:00 Jiangping China  0.1
23 Jul 2021 11:00 Wanwei China  0.1
25 Jul 2021 09:30 Guhuai China  0.1
24 Jul 2021 06:15 An Co Vietnam  0.1
24 Jul 2021 06:15 Dai Loc Vietnam  0.1
25 Jul 2021 09:30 Pinghai China  0.1
23 Jul 2021 04:15 Haikou China  0.1
23 Jul 2021 04:15 Puqian China  0.1
23 Jul 2021 02:15 Liu-sha-ying 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 04:30 Xiuying China  0.1
24 Jul 2021 11:30 Gaode China  0.1
24 Jul 2021 11:30 Guchengling China  0.1
25 Jul 2021 14:15 Shaoyao China  0.1
25 Jul 2021 14:15 Huangwu China  0.1
25 Jul 2021 14:15 Nayan China  0.1
23 Jul 2021 04:30 Dong Cay Vietnam  0.1
23 Jul 2021 04:30 Ban Sen Vietnam  0.1
24 Jul 2021 10:15 Hsi-ch'ang-hsu China  0.1
24 Jul 2021 10:15 Hsi-ch'ang China  0.1
24 Jul 2021 10:15 Shagang China  0.1
24 Jul 2021 10:15 Beihai China  0.1
24 Jul 2021 10:15 Dangjiang China  0.1
24 Jul 2021 10:15 Qianjiang China  0.1
23 Jul 2021 06:45 Guangcun China  0.1
23 Jul 2021 06:45 Xinxing China  0.1
23 Jul 2021 06:45 Duntou China  0.1
24 Jul 2021 06:00 Cuu Doi Vietnam  0.1
23 Jul 2021 10:45 Bailong China  0.1
23 Jul 2021 10:45 Jiangshan China  0.1
24 Jul 2021 10:00 Guanjing China  0.1
23 Jul 2021 01:45 Shuiwei China  0.1
25 Jul 2021 06:30 Lianhe China  0.1
25 Jul 2021 06:30 Ch'ing-hsu Taiwan  0.1
25 Jul 2021 06:30 Shijing China  0.1
25 Jul 2021 06:30 Chin-men Tao Taiwan  0.1
25 Jul 2021 06:30 Yang-chai Taiwan  0.1
25 Jul 2021 06:30 Anhai China  0.1
25 Jul 2021 06:30 Tung-shih China  0.1
25 Jul 2021 06:30 Weitou China  0.1
25 Jul 2021 06:30 Chin-ching China  0.1
23 Jul 2021 04:00 Dam Ha Vietnam  0.1
23 Jul 2021 04:00 Cai Kien Vietnam  0.1
23 Jul 2021 02:15 Liusha China  0.1
23 Jul 2021 02:15 Mai-ch'en-hsu China  0.1
24 Jul 2021 06:15 Hoang Chau Vietnam  0.1
24 Jul 2021 10:00 Hsi-niu-chiao China  0.1
24 Jul 2021 10:00 Pingshan China  0.1
23 Jul 2021 06:45 Beili China  0.1
23 Jul 2021 06:45 Changhua China  0.1
23 Jul 2021 04:00 Vinh Thuc Vietnam  0.1
25 Jul 2021 06:45 Chin-men Taiwan  0.1
23 Jul 2021 06:30 Lingtou China  0.1
24 Jul 2021 08:30 Hai Phong Vietnam  0.1
24 Jul 2021 08:30 Thuy U Vietnam  0.1
24 Jul 2021 08:30 Quang Yen Vietnam  0.1
24 Jul 2021 10:30 Longmen China  0.1
24 Jul 2021 10:30 Dafanpo China  0.1
23 Jul 2021 04:00 Dang Noi Vietnam  0.1
24 Jul 2021 10:45 Qiaotou China  0.1
23 Jul 2021 04:00 Boshegang China  0.1
25 Jul 2021 09:00 Qian'an China  0.1
25 Jul 2021 09:00 Chongwu China  0.1
25 Jul 2021 13:45 Doulongcun China  0.1
25 Jul 2021 13:45 Guanchang China  0.1
25 Jul 2021 13:45 Jinhe China  0.1
25 Jul 2021 13:45 Wai-lo China  0.1
24 Jul 2021 07:00 Gia Luan Vietnam  0.1
24 Jul 2021 07:00 Dong Vang Vietnam  0.1
24 Jul 2021 07:00 Hon Gay Vietnam  0.1
24 Jul 2021 07:00 Lang Bang Vietnam  0.1
24 Jul 2021 07:00 Ha Tou Vietnam  0.1
23 Jul 2021 02:45 Foluo China  0.1
25 Jul 2021 13:00 Zhanjiang China  0.1
25 Jul 2021 13:00 Ma-hsieh China  0.1
25 Jul 2021 13:00 Badongxu China  0.1
25 Jul 2021 13:00 Baisha China  0.1
25 Jul 2021 13:00 Xingyou China  0.1