Overall Orange alert Tropical Cyclone for CEMPAKA-21
in China
21 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 GFS
Exposed countries Taiwan
Exposed population No people in Category 1 or higher
Maximum wind speed 58 km/h
Maximum storm surge 0.3 m (21 Jul 17:30 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
GFS Current 58 km/h 0.3 m 103 mm 0.5
GFS Overall 144 km/h 1.2 m 795 mm 0.5

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

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Wind

144 km/h

Up to 30 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 12:00 UTC
CategoryCountryPopulation 
Tropical StormTaiwan25,705 

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 72 - - - - - - -
GREEN 2 19 Jul 2021 00:00 108 - - - - - - -
GREEN 3 19 Jul 2021 06:00 94 - - - - - - -
GREEN 4 19 Jul 2021 12:00 108 -
- - - - - China
GREEN 5 19 Jul 2021 18:00 112 - - - - - - -
GREEN 6 20 Jul 2021 00:00 144 -
- - - - - China
GREEN 7 20 Jul 2021 06:00 126 -
- - - - - China
GREEN 8 20 Jul 2021 12:00 119 -
- - - - - China
GREEN 9 20 Jul 2021 18:00 65 -
- - - - - China
GREEN 10 21 Jul 2021 00:00 54 - - - - - - -
GREEN 11 21 Jul 2021 06:00 58 - - - - - - -
GREEN 12 21 Jul 2021 12:00 61 -
- - - - - Taiwan
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 12:00 UTC
LevelCountryPopulation 
250-500 mmLaos, Philippines87,539
+
Laos109 
Philippines87,430 
100-250 mmChina, Vietnam, Laos, Thailand, Philippines15,429,220
+
China2,387,685 
Vietnam2,138,299 
Laos1,716,949 
Philippines7,563,503 
Thailand1,622,783 
50-100 mmChina, Taiwan, Vietnam, Laos, Philippines, Thailand, Cambodia66,235,081
+
China29,486,080 
Taiwan495,378 
Vietnam28,152,197 
Laos1,396,580 
Philippines1,918,668 
Thailand4,776,947 
Cambodia9,227 

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 18:00 142 80 thousand
- - - - Laos, Vietnam, Cambodia
Blue 2 19 Jul 2021 00:00 171 -
- - - - - Laos, Cambodia
Blue 3 19 Jul 2021 06:00 157 -
- - - - - Hong Kong, China
Blue 4 19 Jul 2021 12:00 126 - - - - - - -
Blue 5 19 Jul 2021 18:00 223 -
- - - - - Laos, Vietnam
Blue 6 20 Jul 2021 00:00 221 Few people
- - - - China, Laos, Thailand
Blue 7 20 Jul 2021 06:00 274 170 thousand
- - - - China
Blue 8 20 Jul 2021 12:00 187 440 thousand
- - - - China
Blue 9 20 Jul 2021 18:00 151 790 thousand
- - - - China
Blue 10 21 Jul 2021 00:00 75 -
- - - - - China
Blue 11 21 Jul 2021 06:00 66 -
- - - - - China
Blue 12 21 Jul 2021 12:00 254 15.5 million
- - - China, Taiwan, Vietnam, Laos, Philippines, 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 21 Jul 2021 17:30 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 12:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
21 Jul 2021 17:30 San Shah China  0.3
21 Jul 2021 17:30 Gaoshan China  0.3
21 Jul 2021 17:30 Ta-ch'iu China  0.3
21 Jul 2021 17:30 Beicuo China  0.3
21 Jul 2021 17:30 Guanjing China  0.3
21 Jul 2021 17:30 Cao Yu China  0.3
21 Jul 2021 17:30 Qingfeng China  0.3
21 Jul 2021 17:30 Pingtan China  0.3
21 Jul 2021 15:00 Huangge China  0.2
21 Jul 2021 15:00 Min-chung China  0.2
21 Jul 2021 15:00 Wan-ch'ing-sha China  0.2
21 Jul 2021 15:00 Jiang'ouwei China  0.2
21 Jul 2021 15:00 Cheng'anwei China  0.2
21 Jul 2021 15:00 Fumunchai China  0.2
21 Jul 2021 15:00 Fumuntschai China  0.2
21 Jul 2021 15:00 Baihao China  0.2
21 Jul 2021 15:00 Taiping China  0.2
21 Jul 2021 15:00 Sha-ching China  0.2
21 Jul 2021 15:00 Heping China  0.2
21 Jul 2021 14:30 Qishan China  0.2
21 Jul 2021 12:45 Nanping China  0.2
21 Jul 2021 12:45 Cuihengcun China  0.2
21 Jul 2021 12:45 Xiazha China  0.2
21 Jul 2021 12:45 Maogang China  0.2
21 Jul 2021 12:45 Macau Macau (China)  0.2
21 Jul 2021 12:45 Heung chau China  0.2
21 Jul 2021 12:45 Ch'i-ao China  0.2
21 Jul 2021 14:15 Taipa Macau (China)  0.2
21 Jul 2021 14:15 Coloane Macau (China)  0.2
21 Jul 2021 15:15 Dayang China  0.2
21 Jul 2021 15:15 Guanghai China  0.2
21 Jul 2021 15:15 Doushan China  0.2
21 Jul 2021 15:15 Tiantou China  0.2
21 Jul 2021 15:15 Tonggu China  0.2
21 Jul 2021 15:15 Chixi China  0.2
21 Jul 2021 14:45 Nantou China  0.2
21 Jul 2021 15:15 Shalan China  0.2
21 Jul 2021 15:15 Dalangwan China  0.2
21 Jul 2021 12:30 Fan Kwai Tong Hong Kong (China)  0.2
21 Jul 2021 14:30 Baijiao China  0.2
21 Jul 2021 14:30 San-tsao China  0.2
21 Jul 2021 16:30 Chiu-chieh China  0.2
21 Jul 2021 16:30 Shekou China  0.2
21 Jul 2021 13:15 Beidou China  0.2
21 Jul 2021 13:15 Chen-hai China  0.2
21 Jul 2021 13:15 Shen-ching China  0.2
21 Jul 2021 16:45 Castle Peak New Town Hong Kong (China)  0.2
21 Jul 2021 16:45 Tuen Mun Hong Kong (China)  0.2
21 Jul 2021 15:45 Luewei China  0.2
21 Jul 2021 15:45 Shadi China  0.2
21 Jul 2021 17:30 Houtian China  0.1
21 Jul 2021 16:00 Huangchong China  0.1
21 Jul 2021 16:00 Meige China  0.1
21 Jul 2021 16:00 Mashan China  0.1
21 Jul 2021 16:00 Mei-ko China  0.1
21 Jul 2021 16:00 Pingsha China  0.1
21 Jul 2021 16:00 Doumen China  0.1
21 Jul 2021 12:00 Lajiwei China  0.1
21 Jul 2021 16:00 Ching-an China  0.1
21 Jul 2021 16:00 Xiaolin China  0.1
21 Jul 2021 12:15 Tai Long Wan Hong Kong (China)  0.1
21 Jul 2021 12:15 Lau Fau Sha Hong Kong (China)  0.1
21 Jul 2021 12:15 Ngau Kwu Long Hong Kong (China)  0.1
21 Jul 2021 16:45 Taiping China  0.1
21 Jul 2021 16:45 Xianmai China  0.1
21 Jul 2021 16:45 Longshe China  0.1
21 Jul 2021 16:45 Dongli China  0.1
21 Jul 2021 16:30 Tung-li China  0.1
21 Jul 2021 16:30 Dongshan China  0.1
21 Jul 2021 12:00 Ham Tin Hong Kong (China)  0.1
21 Jul 2021 12:30 Yuen Long Hong Kong (China)  0.1
21 Jul 2021 12:30 Sz Pak Hong Kong (China)  0.1
21 Jul 2021 13:15 Wanshan China  0.1
21 Jul 2021 12:30 Dagou China  0.1
21 Jul 2021 12:30 Hsin-chou China  0.1
21 Jul 2021 15:00 Donghong China  0.1
21 Jul 2021 15:00 Jinghai China  0.1
21 Jul 2021 15:00 Haimen China  0.1
21 Jul 2021 15:00 Ch'ao-yang-hsien China  0.1
21 Jul 2021 15:00 Dahao China  0.1
21 Jul 2021 15:00 Aotou China  0.1
21 Jul 2021 15:00 Daitou China  0.1
21 Jul 2021 15:00 Guangao China  0.1
21 Jul 2021 15:00 Siwei China  0.1
21 Jul 2021 15:00 Houzhai China  0.1
21 Jul 2021 13:30 Raoping China  0.1
21 Jul 2021 13:30 Zhelin China  0.1
21 Jul 2021 13:30 Shenao China  0.1
21 Jul 2021 13:30 Nanao China  0.1
21 Jul 2021 13:30 Chelim China  0.1
21 Jul 2021 13:30 Gongkou China  0.1
21 Jul 2021 13:30 Dongshan China  0.1
21 Jul 2021 12:30 Jiangcheng China  0.1
21 Jul 2021 12:30 Baipu China  0.1
21 Jul 2021 17:00 Jiesheng China  0.1
21 Jul 2021 17:00 Tianqian China  0.1
21 Jul 2021 17:00 Zhelang China  0.1
21 Jul 2021 16:15 Dongjian China  0.1
21 Jul 2021 16:15 Houhu China  0.1
21 Jul 2021 16:15 Bengtang China  0.1
21 Jul 2021 16:15 Houhai China  0.1
21 Jul 2021 15:30 Shantou China  0.1
21 Jul 2021 12:00 Yuen Long Hong Kong (China)  0.1
21 Jul 2021 12:00 Tai Po Hong Kong (China)  0.1
21 Jul 2021 12:00 Tai Po Industrial Estate Hong Kong (China)  0.1
21 Jul 2021 12:00 Fung Yuen Hong Kong (China)  0.1
21 Jul 2021 12:00 Dabu Hong Kong (China)  0.1
21 Jul 2021 12:00 Sha Tau Kok China  0.1
21 Jul 2021 12:00 Cheung Kang Hong Kong (China)  0.1
21 Jul 2021 12:00 Imtin China  0.1
21 Jul 2021 12:00 Cheung Wo Hong Kong (China)  0.1
21 Jul 2021 12:00 Pak Sha Au Hong Kong (China)  0.1
21 Jul 2021 12:00 Long Ke Hong Kong (China)  0.1
21 Jul 2021 12:00 Khitschhung China  0.1
21 Jul 2021 12:15 Dapeng China  0.1
21 Jul 2021 12:15 Taipang China  0.1
21 Jul 2021 12:15 Shagang China  0.1
21 Jul 2021 12:15 Aotou China  0.1
21 Jul 2021 12:15 Luzui China  0.1
21 Jul 2021 14:15 Huanglong China  0.1
21 Jul 2021 13:00 Pinggang China  0.1