Overall Orange Tropical Cyclone alert for CEMPAKA-21 in China from 18 Jul 2021 18:00 UTC to 23 Jul 2021 12:00 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Orange alert Tropical Cyclone for CEMPAKA-21

in China

18 Jul 2021 00 UTC

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to select bulletin time

Meteorological source:

GDACS JTWC

Impact Single TC

GFS
HWRF
ECMWF

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	ECMWF
Exposed countries	China
Exposed population	No people in Category 1 or higher
Maximum wind speed	43 km/h
Maximum storm surge	0.2 m (18 Jul 08:00 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
ECMWF Current	43 km/h	0.2 m	100 mm	0.5
ECMWF Overall	72 km/h	0.8 m	923 mm	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track)

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Wind

72 km/h

Up to 20 thousand can be affected by wind speeds of Tropical Storm strength or above

Wind exposed population - AoIs

Estimations based on the bulletin of 18 Jul 2021 00:00 UTC

Category	Country	Population
Tropical Storm	China	18,273

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
	1	18 Jul 2021 00:00	68	-		-	-	-	-	-	China

Download:

Impact estimation for the next 72h

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Rainfall

Rain exposed population - AoIs

Estimations based on the bulletin of 18 Jul 2021 00:00 UTC

Level	Country	Population
250-500 mm	China, Philippines	39,785	+
	China	448
	Philippines	39,337
100-250 mm	China, Vietnam, Hong Kong, Macao, Laos, Thailand, Philippines, Cambodia	5,200,997	+
	China	1,783,980
	Vietnam	962,942
	Hong Kong	36,298
	Macao	579,652
	Laos	98,950
	Philippines	1,606,085
	Thailand	132,435
	Cambodia	652
50-100 mm	China, Taiwan, Vietnam, Hong Kong, Laos, Philippines, Thailand, Cambodia	52,081,995	+
	China	26,533,043
	Taiwan	60,691
	Vietnam	8,277,796
	Hong Kong	5,897,012
	Laos	2,179,404
	Philippines	7,448,444
	Thailand	1,523,255
	Cambodia	162,346

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
	1	18 Jul 2021 00:00	614	5.2 million				-	-	-	China, Taiwan, Vietnam, Hong Kong, Macao, Laos, Philippines, Thailand, Cambodia

Impact estimation for the next 72h

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StormSurge

0.2 m

The maximum Storm surge height is 0.2m in Dongjian, China. This height is estimated for 18 Jul 2021 08:00 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 18 Jul 2021 00:00 UTC

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	18 Jul 2021 08:00	Dongjian	China	0.2
	18 Jul 2021 08:00	Badongxu	China	0.2
	18 Jul 2021 08:00	Houhu	China	0.2
	18 Jul 2021 08:00	Bengtang	China	0.2
	18 Jul 2021 08:00	Houhai	China	0.2
	18 Jul 2021 08:00	Baisha	China	0.2
	18 Jul 2021 08:00	Shaoyao	China	0.2
	18 Jul 2021 08:00	Xingyou	China	0.2
	18 Jul 2021 08:00	Huangwu	China	0.2
	18 Jul 2021 08:00	Nayan	China	0.2
	18 Jul 2021 08:00	Doulongcun	China	0.2
	18 Jul 2021 07:30	Nanping	China	0.2
	18 Jul 2021 07:30	Maogang	China	0.2
	18 Jul 2021 07:30	Macau	Macau (China)	0.2
	18 Jul 2021 07:30	Taipa	Macau (China)	0.2
	18 Jul 2021 07:30	Coloane	Macau (China)	0.2
	18 Jul 2021 07:30	Heung chau	China	0.2
	18 Jul 2021 11:15	Xiazha	China	0.2
	18 Jul 2021 09:30	Dayang	China	0.2
	18 Jul 2021 09:30	Dalangwan	China	0.2
	18 Jul 2021 09:30	Guanghai	China	0.2
	18 Jul 2021 09:30	Tiantou	China	0.2
	18 Jul 2021 09:30	Tonggu	China	0.2
	18 Jul 2021 12:00	Luewei	China	0.2
	18 Jul 2021 12:00	Shalan	China	0.2
	18 Jul 2021 12:00	Shadi	China	0.2
	18 Jul 2021 11:30	Taiping	China	0.2
	18 Jul 2021 11:30	Xianmai	China	0.2
	18 Jul 2021 11:30	Longshe	China	0.2
	18 Jul 2021 11:30	Dongli	China	0.2
	18 Jul 2021 11:30	Tung-li	China	0.1
	18 Jul 2021 11:30	Dongshan	China	0.1
	18 Jul 2021 07:30	Ky Tan	Vietnam	0.1
	18 Jul 2021 07:30	Duc Pho	Vietnam	0.1
	18 Jul 2021 07:30	An Lac	Vietnam	0.1
	18 Jul 2021 12:00	Chixi	China	0.1
	18 Jul 2021 10:45	Dapeng	China	0.1
	18 Jul 2021 10:45	Taipang	China	0.1
	18 Jul 2021 10:45	Aotou	China	0.1
	18 Jul 2021 10:45	Luzui	China	0.1
	18 Jul 2021 10:45	Hsia-yung	China	0.1
	18 Jul 2021 08:45	Guanchang	China	0.1
	18 Jul 2021 08:45	Jinhe	China	0.1
	18 Jul 2021 08:45	Wai-lo	China	0.1
	18 Jul 2021 05:00	Renshan	China	0.1
	18 Jul 2021 05:00	Jen-shan	China	0.1
	18 Jul 2021 05:00	Fanhe	China	0.1
	18 Jul 2021 05:00	Pinghai	China	0.1
	18 Jul 2021 12:00	Cuihengcun	China	0.1
	18 Jul 2021 12:00	Qishan	China	0.1
	18 Jul 2021 12:00	Ch'i-ao	China	0.1
	18 Jul 2021 10:45	Mashan	China	0.1
	18 Jul 2021 10:45	Pingsha	China	0.1
	18 Jul 2021 09:30	Shagang	China	0.1
	18 Jul 2021 04:00	Houmen	China	0.1
	18 Jul 2021 08:45	Jiesheng	China	0.1
	18 Jul 2021 08:45	Tianqian	China	0.1
	18 Jul 2021 08:45	Zhelang	China	0.1
	18 Jul 2021 05:30	Yuen Long	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Tai Po	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Tai Po Industrial Estate	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Fung Yuen	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Dabu	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Sha Tau Kok	China	0.1
	18 Jul 2021 05:30	Cheung Kang	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Imtin	China	0.1
	18 Jul 2021 05:30	Cheung Wo	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Pak Sha Au	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Long Ke	Hong Kong (China)	0.1
	18 Jul 2021 05:30	Khitschhung	China	0.1
	18 Jul 2021 12:00	Wanshan	China	0.1
	18 Jul 2021 12:00	Lajiwei	China	0.1
	18 Jul 2021 12:00	Tai Long Wan	Hong Kong (China)	0.1
	18 Jul 2021 05:00	Baijiao	China	0.1
	18 Jul 2021 05:00	San-tsao	China	0.1
	18 Jul 2021 11:45	Cheung Sha Wan	Hong Kong (China)	0.1
	18 Jul 2021 11:45	Tsz Wa Chan	Hong Kong (China)	0.1
	18 Jul 2021 11:45	Yau Ma Po	Hong Kong (China)	0.1
	18 Jul 2021 11:45	Sai Kung	Hong Kong (China)	0.1
	18 Jul 2021 05:15	San Shah	China	0.1
	18 Jul 2021 05:15	Gaoshan	China	0.1
	18 Jul 2021 05:15	Ta-ch'iu	China	0.1
	18 Jul 2021 05:15	Beicuo	China	0.1
	18 Jul 2021 05:15	Guanjing	China	0.1
	18 Jul 2021 05:15	Cao Yu	China	0.1
	18 Jul 2021 05:15	Qingfeng	China	0.1
	18 Jul 2021 05:15	Pingtan	China	0.1
	18 Jul 2021 12:00	Aberdeen	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Won Hang	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Tain Sha Tsui	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Central	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Kowloon	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Wan Chai	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Chung Hom Kok	Hong Kong (China)	0.1
	18 Jul 2021 12:00	North Point	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Chek Chue	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Crocodile Hill	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Tai Tam	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Stanley	Hong Kong (China)	0.1
	18 Jul 2021 12:00	San Wan Ho Shau	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Yau Tong	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Rennie's Mill	Hong Kong (China)	0.1
	18 Jul 2021 12:00	A Kung Ngam	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Chai Wan	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Sau Mau Ping	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Hok Tsui Wan	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Chik Sha	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Hang Hau	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Tei Tong Tsui	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Tai Wan Tau	Hong Kong (China)	0.1
	18 Jul 2021 05:45	Meige	China	0.1
	18 Jul 2021 05:45	Doumen	China	0.1
	18 Jul 2021 06:00	An Thach	Vietnam	0.1
	18 Jul 2021 08:45	Zhanjiang	China	0.1
	18 Jul 2021 08:45	Ma-hsieh	China	0.1
	18 Jul 2021 04:00	Magong	China	0.1
	18 Jul 2021 04:00	Jizhongtuo	China	0.1
	18 Jul 2021 09:00	Dianbai	China	0.1
	18 Jul 2021 09:00	Danchang	China	0.1
	18 Jul 2021 09:00	Magang	China	0.1
	18 Jul 2021 09:00	Diancheng	China	0.1
	18 Jul 2021 08:45	Xiuying	China	0.1
	18 Jul 2021 08:45	Haikou	China	0.1
	18 Jul 2021 08:45	Puqian	China	0.1
	18 Jul 2021 06:30	Fan Kwai Tong	Hong Kong (China)	0.1
	18 Jul 2021 06:30	Lau Fau Sha	Hong Kong (China)	0.1
	18 Jul 2021 12:00	Xiaolin	China	0.1
	18 Jul 2021 10:15	Donghong	China	0.1
	18 Jul 2021 10:15	Jinghai	China	0.1
	18 Jul 2021 10:15	Ch'ao-yang-hsien	China	0.1
	18 Jul 2021 10:15	Haimen	China	0.1
	18 Jul 2021 10:15	Dahao	China	0.1
	18 Jul 2021 10:15	Aotou	China	0.1
	18 Jul 2021 10:15	Daitou	China	0.1
	18 Jul 2021 03:45	Ngau Kwu Long	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Ham Tin	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Sz Pak	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Nam Wan	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Hoi Pa	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Lo Tik Wan	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Tsuen Wan	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Lo So Shing	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Ha Kwai Chung	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Pok Fu Lam	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Wa Fu Estate	Hong Kong (China)	0.1
	18 Jul 2021 03:45	Kennedy Town	Hong Kong (China)	0.1
	18 Jul 2021 05:15	Pinggang	China	0.1
	18 Jul 2021 05:15	Jiangcheng	China	0.1
	18 Jul 2021 05:15	Baipu	China	0.1
	18 Jul 2021 05:15	Dagou	China	0.1
	18 Jul 2021 06:00	Potou	China	0.1
	18 Jul 2021 06:00	Huangpo	China	0.1
	18 Jul 2021 06:00	Chiu-wu-ch'uan	China	0.1
	18 Jul 2021 09:45	Shanwei	China	0.1
	18 Jul 2021 12:00	Rudong	China	0.1

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