Overall Green alert Tropical Cyclone for CHOI-WAN-21
in Japan, China, Philippines,
30 May 2021 18 UTC
click on to select bulletin time
Impact Single TC
Impact based on all weather systems in the area

Impact

Tropical Cyclone CHOI-WAN-21 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source GFS
Exposed countries Philippines
Exposed population No people in Category 1 or higher
Maximum wind speed 112 km/h
Maximum storm surge 0.2 m (30 May 22:45 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 112 km/h 0.2 m 224 mm 0.5
GFS Overall 112 km/h 0.7 m 668 mm 0.5

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

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Wind

112 km/h

Up to 2.8 million can be affected by wind speeds of Tropical Storm strength or above



Wind exposed population - AoIs

Estimations based on the bulletin of 30 May 2021 18:00 UTC
CategoryCountryPopulation 
Tropical StormPhilippines2,831,500 

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 29 May 2021 18:00 58 - - - - - - -
GREEN 2 30 May 2021 00:00 101 - - - - - - -
GREEN 3 30 May 2021 06:00 72 - - - - - - -
GREEN 4 30 May 2021 12:00 76 - - - - - - -
GREEN 5 30 May 2021 18:00 112 -
- - - - - Philippines
Download:





Impact estimation for the next 72h
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Rainfall





Rain exposed population - AoIs

Estimations based on the bulletin of 30 May 2021 18:00 UTC
LevelCountryPopulation 
250-500 mmPhilippines237,099 
100-250 mmChina, Taiwan, Philippines19,416,413
+
China10,279,223 
Taiwan1,149 
Philippines9,136,039 
50-100 mmChina, Japan, Taiwan, Hong Kong, Philippines93,869,369
+
China86,282,317 
Japan1,919 
Taiwan104,617 
Hong Kong3,514,181 
Philippines3,966,334 

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 29 May 2021 18:00 178 - - - - - - -
Blue 2 30 May 2021 00:00 192 - - - - - - -
Blue 3 30 May 2021 06:00 148 -
- - - - - Japan, Taiwan, China
Blue 4 30 May 2021 12:00 262 -
- - - - - Taiwan
Blue 5 30 May 2021 18:00 476 19.7 million
- - - China, Japan, Taiwan, Hong Kong, Philippines




Impact estimation for the next 72h
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StormSurge

0.2 m

The maximum Storm surge height is  0.2m in Dangjin, Republic of Korea. This height is estimated for 30 May 2021 22:45 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 30 May 2021 18:00 UTC
    
Alert Date (UTC) Name Country Storm surge height (m)
30 May 2021 22:45 Dangjin Republic of Korea  0.2
30 May 2021 22:45 Chunghung-ni Republic of Korea  0.2
30 May 2021 22:45 Kooni Republic of Korea  0.2
30 May 2021 22:45 Ahyon-ni Republic of Korea  0.2
30 May 2021 22:45 Anjung-ni Republic of Korea  0.2
30 May 2021 23:15 Gangkou China  0.2
30 May 2021 23:15 Hsia-mei China  0.2
30 May 2021 23:15 Jiuzhen China  0.2
30 May 2021 23:15 Liu'ao China  0.2
30 May 2021 23:15 Shentu China  0.2
30 May 2021 20:15 Ta-yu-chien China  0.2
30 May 2021 20:00 Shuangyangzha China  0.2
30 May 2021 20:00 T'ang-sheng-chiang China  0.2
30 May 2021 20:00 Dongxiaohai China  0.2
30 May 2021 22:15 Hasambong Republic of Korea  0.2
30 May 2021 22:15 Ch'ien-tung-hsu China  0.2
30 May 2021 22:15 Qiandong China  0.2
30 May 2021 22:15 Jingzhou China  0.2
30 May 2021 22:15 Huanglong China  0.2
30 May 2021 22:15 Huanggang China  0.2
30 May 2021 22:15 Raoping China  0.2
30 May 2021 22:15 Zhelin China  0.2
30 May 2021 22:15 Shenao China  0.2
30 May 2021 18:30 Dongxi Liandao China  0.2
30 May 2021 19:00 Hongshiya China  0.2
30 May 2021 19:00 Lingshanwei China  0.2
30 May 2021 19:00 Houwan China  0.2
30 May 2021 19:00 Yantaiqian China  0.2
30 May 2021 19:00 Xianlang China  0.2
30 May 2021 19:00 Beizhuang China  0.2
30 May 2021 19:00 Ch'ing-tao China  0.2
30 May 2021 19:00 Sifang China  0.2
30 May 2021 19:00 Qingdao China  0.2
30 May 2021 19:00 Fushansuo China  0.2
31 May 2021 00:00 Chihu China  0.2
31 May 2021 00:00 Fotan China  0.2
31 May 2021 00:00 Chen-hai China  0.2
30 May 2021 18:00 Xugou China  0.2
30 May 2021 21:30 Liulishe China  0.2
30 May 2021 21:30 Liu-tsao China  0.2
30 May 2021 21:30 Hsiao-yang-k'ou China  0.2
30 May 2021 21:30 Huangang China  0.2
30 May 2021 19:45 Liuduo China  0.2
30 May 2021 18:00 Yancangcheng China  0.2
30 May 2021 18:00 Hsing-chuang China  0.2
30 May 2021 18:00 Haitou China  0.2
30 May 2021 18:00 Hsia-k'ou China  0.2
30 May 2021 18:00 Jiuliqi China  0.2
30 May 2021 19:15 Yanweigang China  0.2
30 May 2021 18:00 Shiqiao China  0.2
30 May 2021 18:00 Che-wang China  0.2
30 May 2021 22:45 Houzhai China  0.2
30 May 2021 22:45 Nanao China  0.2
30 May 2021 22:45 Chelim China  0.2
30 May 2021 23:15 Gangwei China  0.2
30 May 2021 23:15 Daomei China  0.2
30 May 2021 23:30 Guleitou China  0.2
31 May 2021 00:00 Songyu China  0.2
31 May 2021 00:00 Xucuo China  0.2
31 May 2021 00:00 Gulangyu China  0.2
31 May 2021 00:00 Xiamen China  0.2
31 May 2021 00:00 Dianqian China  0.2
31 May 2021 00:00 Jiangtou China  0.2
31 May 2021 00:00 Zhenhai China  0.2
31 May 2021 00:00 Hecuo China  0.2
31 May 2021 00:00 Aotou China  0.2
31 May 2021 00:00 An-ting Taiwan  0.2
30 May 2021 22:00 Dongtaihezha China  0.2
30 May 2021 19:15 Huangshagang China  0.2
30 May 2021 23:30 Aotou China  0.2
30 May 2021 23:30 Siwei China  0.2
30 May 2021 19:45 Xinyanggang China  0.2
30 May 2021 18:00 Fenshui China  0.2
30 May 2021 18:00 Andongwei China  0.2
30 May 2021 18:00 Lanshantou China  0.2
30 May 2021 21:15 Chonghyon-dong Republic of Korea  0.2
30 May 2021 21:15 Masan-ni Republic of Korea  0.2
30 May 2021 21:15 Wonha-ri Republic of Korea  0.2
30 May 2021 21:15 Namyang Republic of Korea  0.2
30 May 2021 21:15 Incheon Republic of Korea  0.2
30 May 2021 23:45 Chin-men Taiwan  0.1
30 May 2021 23:45 Wangcun China  0.1
30 May 2021 23:45 Wali China  0.1
30 May 2021 23:45 Xingcun China  0.1
30 May 2021 23:45 Ta-shan China  0.1
30 May 2021 23:45 Dashan China  0.1
31 May 2021 00:00 Liuwudian China  0.1
31 May 2021 00:00 Xindian China  0.1
31 May 2021 00:00 Lianhe China  0.1
30 May 2021 22:30 Chawol-li Republic of Korea  0.1
30 May 2021 23:45 Wanggezhuang China  0.1
30 May 2021 23:45 Aoshanwei China  0.1
30 May 2021 21:15 Sansha China  0.1
30 May 2021 21:15 Huang-ch'i China  0.1
30 May 2021 21:15 Shacheng China  0.1
30 May 2021 23:00 Magtang Philippines  0.1
30 May 2021 23:00 Tandoc Philippines  0.1
30 May 2021 23:00 Lamon Philippines  0.1
30 May 2021 23:00 Union Philippines  0.1
30 May 2021 23:00 San Vicente Philippines  0.1
30 May 2021 23:00 Gongonan Philippines  0.1
30 May 2021 23:00 Mapid Philippines  0.1
30 May 2021 23:00 Balaton Philippines  0.1
30 May 2021 23:30 Dahao China  0.1
30 May 2021 23:30 Daitou China  0.1
31 May 2021 00:00 Ch'ing-hsu Taiwan  0.1
31 May 2021 00:00 Chin-men Tao Taiwan  0.1
31 May 2021 00:00 Yang-chai Taiwan  0.1
30 May 2021 23:45 Gongkou China  0.1
30 May 2021 20:45 Dongyuan China  0.1
30 May 2021 20:45 Zhangban China  0.1
30 May 2021 20:45 Wangchuan China  0.1
30 May 2021 20:45 Dawu China  0.1
30 May 2021 20:45 Fengwei China  0.1
30 May 2021 20:45 Hsiao-tso China  0.1
30 May 2021 20:30 Chien-chen China  0.1
30 May 2021 20:30 Ch'ang-sha China  0.1
30 May 2021 23:15 Shantou China  0.1
30 May 2021 23:15 Guangao China  0.1
30 May 2021 21:15 Nankan China  0.1
30 May 2021 21:15 Beikan China  0.1
30 May 2021 18:45 Sinsong Republic of Korea  0.1
30 May 2021 18:45 Chungjang Republic of Korea  0.1
30 May 2021 18:45 Tongmokp Republic of Korea  0.1
30 May 2021 18:45 Mongmal Republic of Korea  0.1
30 May 2021 18:45 Songch'on Republic of Korea  0.1
30 May 2021 18:45 Haksong-ni Republic of Korea  0.1
30 May 2021 18:45 Taechon-ni Republic of Korea  0.1
30 May 2021 18:00 Taolekow China  0.1
30 May 2021 21:00 Tung-ch'ung China  0.1
30 May 2021 21:00 Xinan China  0.1
30 May 2021 21:00 Nantang China  0.1
30 May 2021 21:00 Xiahu China  0.1
30 May 2021 21:00 Hanjiang China  0.1
30 May 2021 21:00 Changchun China  0.1
30 May 2021 21:00 Wuqu China  0.1
30 May 2021 21:00 Luxia China  0.1
30 May 2021 23:30 Fengcheng China  0.1
30 May 2021 23:30 Dongshan China  0.1
30 May 2021 20:45 Zhongmen China  0.1
30 May 2021 20:45 P'u-hsi China  0.1
30 May 2021 20:45 P'u-hsi-ch'eng China  0.1
30 May 2021 23:30 Sidu China  0.1
30 May 2021 23:30 Gongqiancun China  0.1
30 May 2021 23:30 Chencheng China  0.1
30 May 2021 19:15 Liujiazhai China  0.1
30 May 2021 19:15 Shijiusuo China  0.1
30 May 2021 20:15 Guhuai China  0.1
30 May 2021 20:15 Chiang-t'ien China  0.1
30 May 2021 20:15 Chang-chiang China  0.1
30 May 2021 20:15 Chin-feng China  0.1
30 May 2021 20:15 Wuhang China  0.1
30 May 2021 20:00 Guanjing China  0.1
30 May 2021 20:00 Qingfeng China  0.1
30 May 2021 20:00 Pingtan China  0.1
30 May 2021 20:00 Houtian China  0.1
31 May 2021 00:00 Shazikou China  0.1
30 May 2021 23:00 Chengguanzhen China  0.1
30 May 2021 21:00 Fengting China  0.1
30 May 2021 21:00 Dongsha China  0.1
30 May 2021 21:00 Lingchuan China  0.1
30 May 2021 22:45 Chendai China  0.1
30 May 2021 22:45 Hsi-pu China  0.1
31 May 2021 00:00 Chin-chia-k'ou China  0.1
30 May 2021 22:45 Ch'ao-yang-hsien China  0.1
30 May 2021 22:45 Haimen China  0.1
30 May 2021 18:15 Longtian China  0.1
30 May 2021 18:15 Gangtou China  0.1
30 May 2021 18:15 San Shah China  0.1
30 May 2021 18:15 Gaoshan China  0.1
30 May 2021 18:15 Beicuo China  0.1
30 May 2021 23:30 Ts'ang-k'ou China  0.1
30 May 2021 23:30 Hsien-chia-chai China  0.1
31 May 2021 00:00 Qiganshi China  0.1
31 May 2021 00:00 Ju-shan-k'ou China  0.1
31 May 2021 00:00 Hai-yang-so China  0.1
31 May 2021 00:00 Nanhong China  0.1
31 May 2021 00:00 Baishatan China  0.1
30 May 2021 18:00 Jiangjing China  0.1
30 May 2021 18:00 Haikou China  0.1
30 May 2021 21:00 Meizhou China  0.1
30 May 2021 23:15 Donghong China  0.1
30 May 2021 23:15 Jinghai China  0.1
30 May 2021 21:15 Hushi China  0.1
30 May 2021 18:00 Hsia-ho-ch'eng China  0.1
30 May 2021 18:00 Xiahecheng China  0.1
30 May 2021 23:00 Langnuankou China  0.1
30 May 2021 23:00 Xiaoguan China  0.1
30 May 2021 23:00 Xilangnuan China  0.1
30 May 2021 21:15 Xiaguan China  0.1
30 May 2021 21:15 Pucheng China  0.1
30 May 2021 18:00 Zhangjialou China  0.1
31 May 2021 00:00 Cao Yu China  0.1
30 May 2021 18:45 Linao Philippines  0.1
30 May 2021 18:45 Bisagu Philippines  0.1
30 May 2021 18:45 Aparri Philippines  0.1
30 May 2021 18:45 Alilinu Philippines  0.1
30 May 2021 18:45 Punta Philippines  0.1
30 May 2021 18:45 Balza Philippines  0.1
30 May 2021 18:45 Buguey Philippines  0.1
30 May 2021 23:15 Shijing China  0.1
30 May 2021 23:15 Weitou China  0.1
30 May 2021 23:15 Chin-ching China  0.1
30 May 2021 23:30 Wuleidao China  0.1
30 May 2021 23:30 Zeku China  0.1
30 May 2021 23:30 Gaocun China  0.1
30 May 2021 20:30 Placer Philippines  0.1
30 May 2021 20:30 Kinabutan Philippines  0.1
30 May 2021 20:30 Gigaquit Philippines  0.1
30 May 2021 20:30 Talavera Philippines  0.1
30 May 2021 20:30 Claver Philippines  0.1
30 May 2021 20:30 Urbistondo Philippines  0.1
30 May 2021 20:30 Taganito Philippines  0.1
30 May 2021 20:30 Pamosaingan Philippines  0.1
30 May 2021 19:00 Doko-ri Republic of Korea  0.1
30 May 2021 19:00 Ant'ae Republic of Korea  0.1
30 May 2021 19:00 Ach'on Republic of Korea  0.1
30 May 2021 18:45 Yongning China  0.1
30 May 2021 18:45 Shihu China  0.1
30 May 2021 18:45 Hsiang-chih China  0.1
30 May 2021 18:45 Qian'an China  0.1
30 May 2021 18:45 Chongwu China  0.1
30 May 2021 21:30 Pag-aguasan Philippines  0.1
30 May 2021 21:30 Concepcion Philippines  0.1
30 May 2021 21:30 Alabat Philippines  0.1
30 May 2021 21:30 Mascarina Philippines  0.1
30 May 2021 21:30 Apad Philippines  0.1
30 May 2021 21:30 Gumaca Philippines  0.1
30 May 2021 21:30 Argosino Philippines  0.1
30 May 2021 22:30 Santa Maria Philippines  0.1
30 May 2021 22:30 Zamboanga Philippines  0.1
30 May 2021 22:30 Boalan Philippines  0.1
30 May 2021 22:30 Culianan Philippines  0.1
30 May 2021 22:30 Masinloc Philippines  0.1
30 May 2021 22:30 Manicahan Philippines  0.1
30 May 2021 22:30 Bolong Philippines  0.1
30 May 2021 22:30 Curuan Philippines  0.1
30 May 2021 21:30 Atimonan Philippines  0.1
30 May 2021 21:15 Mauban Philippines  0.1
30 May 2021 21:15 San Jose Philippines  0.1
30 May 2021 21:15 Calamias Philippines  0.1
30 May 2021 22:15 Saiku Japan  0.1
30 May 2021 22:15 Obata Japan  0.1
30 May 2021 22:15 Akeno Japan  0.1
30 May 2021 22:15 Muramatsu Japan  0.1
30 May 2021 22:15 Ise Japan  0.1
30 May 2021 22:15 Ominato Japan  0.1
30 May 2021 22:15 Futami Japan  0.1
30 May 2021 22:15 Matsuo Japan  0.1
30 May 2021 22:15 Toba Japan  0.1
30 May 2021 21:45 Ma-chiang China  0.1
30 May 2021 18:00 Ikkum-ni Republic of Korea  0.1
30 May 2021 18:00 Soko-ri Republic of Korea  0.1
30 May 2021 18:00 Hwadong-ni Republic of Korea  0.1
30 May 2021 18:00 Ch'al-tong Republic of Korea  0.1
30 May 2021 18:00 Mogpo Republic of Korea  0.1
30 May 2021 23:15 Tung-shih China  0.1
30 May 2021 23:15 Yakou China  0.1
30 May 2021 21:00 Sipitang Malaysia  0.1
30 May 2021 21:00 Kampong Suasa Malaysia  0.1
30 May 2021 21:00 Mesapol Malaysia  0.1
30 May 2021 21:00 Weston Malaysia  0.1
30 May 2021 22:15 Kadena Japan  0.1
30 May 2021 22:15 Atsuta Japan  0.1
30 May 2021 22:15 Ishikawa Japan  0.1
30 May 2021 22:15 Henna Japan  0.1
30 May 2021 22:15 Kin Japan  0.1
30 May 2021 22:15 Ichi Japan  0.1
30 May 2021 22:15 Teima Japan  0.1