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

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	HWRF
Exposed countries	Vietnam, China
Exposed population	No people in Category 1 or higher
Maximum wind speed	47 km/h
Maximum storm surge	0.3 m (21 Jul 18:00 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	47 km/h	0.3 m	86 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 660 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

Category	Country	Population
Tropical Storm	Vietnam, China	660,813	+
	Vietnam	77,992
	China	582,821

See TC classification SSHS

Wind Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

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 18:00	68	-	-	-	-	-	-	-
2	19 Jul 2021 00:00	86	-		-	-	-	-	-	China
3	19 Jul 2021 06:00	101	-		-	-	-	-	-	China
4	19 Jul 2021 12:00	119	-		-	-	-	-	-	China
5	19 Jul 2021 18:00	122	-		-	-	-	-	-	China
6	20 Jul 2021 00:00	130	-		-	-	-	-	-	China
7	20 Jul 2021 06:00	137	Few people			-	-	-	-	China
8	20 Jul 2021 12:00	137	40 thousand			-	-	-	-	China
9	20 Jul 2021 18:00	104	-		-	-	-	-	-	China
10	21 Jul 2021 00:00	61	-		-	-	-	-	-	China
11	21 Jul 2021 06:00	43	-	-	-	-	-	-	-
12	21 Jul 2021 12:00	119	-		-	-	-	-	-	Vietnam, China

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

Level	Country	Population
750-1000 mm	China	432
500-750 mm	China	8,092
250-500 mm	China, Vietnam, Laos	406,631	+
	China	404,204
	Vietnam	966
	Laos	1,459
100-250 mm	China, Vietnam, Laos	6,375,978	+
	China	5,831,906
	Vietnam	460,057
	Laos	84,014
50-100 mm	China, Vietnam, Laos	12,426,451	+
	China	8,791,951
	Vietnam	3,407,539
	Laos	226,960

Rain Impact Timeline

people affected <=10000

10000< people affected <=100000

people affected >100000

N°	Date (UTC)	Max Rainfall (mm)	Pop >100mm or higher	100-250	250-500	500-750	750-1000	>1000	Countries
1	18 Jul 2021 18:00	150	-	-	-	-	-	-	China, Hong Kong
2	19 Jul 2021 00:00	178	-	-	-	-	-	-	China, Macao
3	19 Jul 2021 06:00	138	-	-	-	-	-	-	China
4	19 Jul 2021 12:00	274	-	-	-	-	-	-	China
5	19 Jul 2021 18:00	277	5 thousand		-	-	-	-	China
6	20 Jul 2021 00:00	290	550 thousand		-	-	-	-	China, Macao
7	20 Jul 2021 06:00	272	Few people		-	-	-	-	China, Hong Kong
8	20 Jul 2021 12:00	189	440 thousand		-	-	-	-	China
9	20 Jul 2021 18:00	228	630 thousand		-	-	-	-	China
10	21 Jul 2021 00:00	328	170 thousand		-	-	-	-	China, Vietnam
11	21 Jul 2021 06:00	111	3 thousand		-	-	-	-	China
12	21 Jul 2021 12:00	959	6.8 million					-	China, Vietnam, Laos

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 18:00 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 21 Jul 2021 12:00 UTC

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	21 Jul 2021 18:00	San Shah	China	0.3
	21 Jul 2021 18:00	Gaoshan	China	0.3
	21 Jul 2021 18:00	Ta-ch'iu	China	0.3
	21 Jul 2021 18:00	Beicuo	China	0.3
	21 Jul 2021 18:00	Guanjing	China	0.3
	21 Jul 2021 18:00	Cao Yu	China	0.3
	21 Jul 2021 18:00	Qingfeng	China	0.3
	21 Jul 2021 18:00	Pingtan	China	0.3
	21 Jul 2021 16:30	Huangge	China	0.2
	21 Jul 2021 16:30	Min-chung	China	0.2
	21 Jul 2021 16:30	Wan-ch'ing-sha	China	0.2
	21 Jul 2021 16:30	Jiang'ouwei	China	0.2
	21 Jul 2021 16:30	Cheng'anwei	China	0.2
	21 Jul 2021 16:30	Fumunchai	China	0.2
	21 Jul 2021 16:30	Fumuntschai	China	0.2
	21 Jul 2021 16:30	Baihao	China	0.2
	21 Jul 2021 16:30	Taiping	China	0.2
	21 Jul 2021 16:30	Sha-ching	China	0.2
	21 Jul 2021 16:30	Heping	China	0.2
	21 Jul 2021 12:00	Cuihengcun	China	0.2
	21 Jul 2021 12:00	Qishan	China	0.2
	21 Jul 2021 12:00	Ch'i-ao	China	0.2
	21 Jul 2021 12:00	Xiazha	China	0.2
	21 Jul 2021 16:45	Yuen Long	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Tai Po	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Tai Po Industrial Estate	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Fung Yuen	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Dabu	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Sha Tau Kok	China	0.2
	21 Jul 2021 16:45	Cheung Kang	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Imtin	China	0.2
	21 Jul 2021 16:45	Cheung Wo	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Pak Sha Au	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Long Ke	Hong Kong (China)	0.2
	21 Jul 2021 16:45	Khitschhung	China	0.2
	21 Jul 2021 18:00	Houtian	China	0.2
	21 Jul 2021 16:15	Nantou	China	0.2
	21 Jul 2021 17:00	Cheung Sha Wan	Hong Kong (China)	0.2
	21 Jul 2021 17:00	Tsz Wa Chan	Hong Kong (China)	0.2
	21 Jul 2021 17:00	Yau Ma Po	Hong Kong (China)	0.2
	21 Jul 2021 17:00	Sai Kung	Hong Kong (China)	0.2
	21 Jul 2021 14:45	Baijiao	China	0.2
	21 Jul 2021 14:45	San-tsao	China	0.2
	21 Jul 2021 14:45	Nanping	China	0.2
	21 Jul 2021 14:45	Macau	Macau (China)	0.2
	21 Jul 2021 14:45	Taipa	Macau (China)	0.2
	21 Jul 2021 14:45	Coloane	Macau (China)	0.2
	21 Jul 2021 15:15	Maogang	China	0.2
	21 Jul 2021 15:15	Heung chau	China	0.2
	21 Jul 2021 15:45	Tiantou	China	0.2
	21 Jul 2021 15:45	Chixi	China	0.2
	21 Jul 2021 15:45	Meige	China	0.2
	21 Jul 2021 15:45	Mashan	China	0.2
	21 Jul 2021 15:45	Pingsha	China	0.2
	21 Jul 2021 15:45	Doumen	China	0.2
	21 Jul 2021 16:45	Fan Kwai Tong	Hong Kong (China)	0.2
	21 Jul 2021 17:15	Huangchong	China	0.2
	21 Jul 2021 17:15	Mei-ko	China	0.2
	21 Jul 2021 18:00	Chiu-chieh	China	0.2
	21 Jul 2021 18:00	Shekou	China	0.2
	21 Jul 2021 15:45	Dapeng	China	0.2
	21 Jul 2021 15:45	Taipang	China	0.2
	21 Jul 2021 15:45	Shagang	China	0.2
	21 Jul 2021 17:45	Shalan	China	0.2
	21 Jul 2021 17:45	Dayang	China	0.2
	21 Jul 2021 17:45	Dalangwan	China	0.2
	21 Jul 2021 17:45	Guanghai	China	0.2
	21 Jul 2021 15:30	Aotou	China	0.2
	21 Jul 2021 15:30	Hsia-yung	China	0.2
	21 Jul 2021 15:30	Renshan	China	0.2
	21 Jul 2021 15:30	Jen-shan	China	0.2
	21 Jul 2021 15:15	Luzui	China	0.2
	21 Jul 2021 15:15	Fanhe	China	0.2
	21 Jul 2021 15:15	Pinghai	China	0.2
	21 Jul 2021 15:15	Tonggu	China	0.2
	21 Jul 2021 17:00	Ching-an	China	0.2
	21 Jul 2021 17:00	Xiaolin	China	0.2
	21 Jul 2021 13:15	Castle Peak New Town	Hong Kong (China)	0.2
	21 Jul 2021 13:15	Tuen Mun	Hong Kong (China)	0.2
	21 Jul 2021 16:00	Lau Fau Sha	Hong Kong (China)	0.2
	21 Jul 2021 16:00	Ngau Kwu Long	Hong Kong (China)	0.2
	21 Jul 2021 16:00	Lajiwei	China	0.2
	21 Jul 2021 18:00	Luewei	China	0.2
	21 Jul 2021 18:00	Shadi	China	0.2
	21 Jul 2021 18:00	Doushan	China	0.2
	21 Jul 2021 16:00	Tai Long Wan	Hong Kong (China)	0.2
	21 Jul 2021 16:00	Ham Tin	Hong Kong (China)	0.2
	21 Jul 2021 16:15	Yuen Long	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Sz Pak	Hong Kong (China)	0.1
	21 Jul 2021 15:00	Beidou	China	0.1
	21 Jul 2021 15:00	Chen-hai	China	0.1
	21 Jul 2021 15:00	Shen-ching	China	0.1
	21 Jul 2021 12:00	Ma-hsieh	China	0.1
	21 Jul 2021 12:00	Badongxu	China	0.1
	21 Jul 2021 12:00	Potou	China	0.1
	21 Jul 2021 12:00	Bengtang	China	0.1
	21 Jul 2021 12:00	Baisha	China	0.1
	21 Jul 2021 12:00	Shaoyao	China	0.1
	21 Jul 2021 12:00	Xingyou	China	0.1
	21 Jul 2021 12:00	Huangpo	China	0.1
	21 Jul 2021 12:00	Chiu-wu-ch'uan	China	0.1
	21 Jul 2021 13:45	Wanshan	China	0.1
	21 Jul 2021 13:30	Donghong	China	0.1
	21 Jul 2021 13:30	Jinghai	China	0.1
	21 Jul 2021 13:30	Haimen	China	0.1
	21 Jul 2021 16:15	Aberdeen	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Won Hang	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Tain Sha Tsui	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Central	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Kowloon	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Wan Chai	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Chung Hom Kok	Hong Kong (China)	0.1
	21 Jul 2021 16:15	North Point	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Chek Chue	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Crocodile Hill	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Tai Tam	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Stanley	Hong Kong (China)	0.1
	21 Jul 2021 16:15	San Wan Ho Shau	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Yau Tong	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Rennie's Mill	Hong Kong (China)	0.1
	21 Jul 2021 16:15	A Kung Ngam	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Chai Wan	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Sau Mau Ping	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Hok Tsui Wan	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Chik Sha	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Hang Hau	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Tei Tong Tsui	Hong Kong (China)	0.1
	21 Jul 2021 16:15	Tai Wan Tau	Hong Kong (China)	0.1
	21 Jul 2021 15:30	Houmen	China	0.1
	21 Jul 2021 12:45	Siwei	China	0.1
	21 Jul 2021 12:45	Huanglong	China	0.1
	21 Jul 2021 12:45	Houzhai	China	0.1
	21 Jul 2021 12:45	Zhelin	China	0.1
	21 Jul 2021 13:30	Ch'ao-yang-hsien	China	0.1
	21 Jul 2021 13:30	Shantou	China	0.1
	21 Jul 2021 13:30	Dahao	China	0.1
	21 Jul 2021 13:30	Aotou	China	0.1
	21 Jul 2021 13:30	Daitou	China	0.1
	21 Jul 2021 13:30	Guangao	China	0.1
	21 Jul 2021 16:15	Xiuying	China	0.1
	21 Jul 2021 16:15	Haikou	China	0.1
	21 Jul 2021 16:15	Puqian	China	0.1
	21 Jul 2021 15:30	Magong	China	0.1
	21 Jul 2021 15:30	Jizhongtuo	China	0.1
	21 Jul 2021 15:30	Shanwei	China	0.1
	21 Jul 2021 12:30	Shenao	China	0.1
	21 Jul 2021 12:30	Nanao	China	0.1
	21 Jul 2021 12:30	Chelim	China	0.1
	21 Jul 2021 12:30	Gongkou	China	0.1
	21 Jul 2021 13:45	Jieshi	China	0.1
	21 Jul 2021 13:45	Hudong	China	0.1
	21 Jul 2021 14:45	Gangkou	China	0.1
	21 Jul 2021 16:30	Lo Tik Wan	Hong Kong (China)	0.1
	21 Jul 2021 16:30	Lo So Shing	Hong Kong (China)	0.1
	21 Jul 2021 16:30	Pok Fu Lam	Hong Kong (China)	0.1
	21 Jul 2021 16:30	Wa Fu Estate	Hong Kong (China)	0.1
	21 Jul 2021 16:30	Kennedy Town	Hong Kong (China)	0.1
	21 Jul 2021 13:30	Jiesheng	China	0.1
	21 Jul 2021 13:30	Tianqian	China	0.1
	21 Jul 2021 13:30	Zhelang	China	0.1
	21 Jul 2021 15:45	Nam Wan	Hong Kong (China)	0.1
	21 Jul 2021 15:45	Hoi Pa	Hong Kong (China)	0.1
	21 Jul 2021 15:45	Tsuen Wan	Hong Kong (China)	0.1
	21 Jul 2021 15:45	Ha Kwai Chung	Hong Kong (China)	0.1
	21 Jul 2021 13:45	Hsing-ch'en	China	0.1
	21 Jul 2021 13:45	Chendai	China	0.1
	21 Jul 2021 13:45	Huqiu	China	0.1
	21 Jul 2021 13:45	Wutian	China	0.1
	21 Jul 2021 13:45	Chengguanzhen	China	0.1
	21 Jul 2021 13:45	Guleitou	China	0.1
	21 Jul 2021 13:45	Gangkou	China	0.1
	21 Jul 2021 13:45	Hsia-mei	China	0.1
	21 Jul 2021 13:15	Raoping	China	0.1
	21 Jul 2021 13:15	Dongshan	China	0.1
	21 Jul 2021 17:45	Chengcun	China	0.1
	21 Jul 2021 17:45	Santouzui	China	0.1
	21 Jul 2021 17:45	Hsi-t'ou	China	0.1
	21 Jul 2021 17:45	Lengzilin	China	0.1
	21 Jul 2021 17:45	Pinggang	China	0.1
	21 Jul 2021 17:45	Jiangcheng	China	0.1
	21 Jul 2021 17:45	Baipu	China	0.1
	21 Jul 2021 16:30	Dagou	China	0.1
	21 Jul 2021 12:15	Shenquan	China	0.1
	21 Jul 2021 14:15	Chencheng	China	0.1
	21 Jul 2021 14:15	Hsi-pu	China	0.1
	21 Jul 2021 16:00	Boshegang	China	0.1
	21 Jul 2021 12:30	Changqingwei	China	0.1

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.