Overall Green Tropical Cyclone alert for OMAIS-21 in Japan, Marshall Islands from 10 Aug 2021 12:00 UTC to 21 Aug 2021 00:00 UTC

21 Aug 2021 00 UTC

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Meteorological source:

GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

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

Meteorological source	GDACS
Exposed countries	Japan, Marshall Islands
Exposed population	No people in Category 1 or higher
Maximum wind speed	93 km/h
Maximum storm surge
Vulnerability	High (Marshall Is.)
Landfall	between 23 Aug 2021 00:00 - 24 Aug 2021 00:00 in Republic of Korea

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
Current	93 km/h	0.0 m	n.a.	0.5
Overall	93 km/h	0.0 m	n.a.	0.5
Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track) based on GDACS impact

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Wind

93 km/h Current Max.

Up to 11.7 million people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

N°	Date (UTC)	Max Winds (km/h)	Population in Tropical Storm or higher	Population in Cat 1. or higher	Countries
1	10 Aug 2021 12:00	65	No people	No people
2	10 Aug 2021 18:00	65	No people	No people
3	11 Aug 2021 00:00	65	No people	No people
4	11 Aug 2021 06:00	65	No people	No people
5	11 Aug 2021 12:00	56	No people	No people
6	11 Aug 2021 18:00	56	No people	No people
7	12 Aug 2021 00:00	56	No people	No people
8	12 Aug 2021 06:00	56	No people	No people
9	12 Aug 2021 12:00	74	No people	No people
10	12 Aug 2021 18:00	74	4 thousand	No people	Guam
11	13 Aug 2021 00:00	83	160 thousand	No people	Guam
12	13 Aug 2021 06:00	111	170 thousand	No people	Guam
13	13 Aug 2021 12:00	120	170 thousand	No people	Guam
14	13 Aug 2021 18:00	120	170 thousand	No people	Guam
15	14 Aug 2021 00:00	130	160 thousand	No people	Guam
16	14 Aug 2021 06:00	139	170 thousand	No people	Marshall Islands, Guam
17	14 Aug 2021 12:00	139	170 thousand	No people	Marshall Islands, Guam
18	14 Aug 2021 18:00	139	170 thousand	No people	Marshall Islands, Guam
19	15 Aug 2021 00:00	139	160 thousand	No people	Marshall Islands, Guam
20	15 Aug 2021 06:00	148	160 thousand	No people	Marshall Islands, Guam
21	15 Aug 2021 12:00	139	Few people	No people	Marshall Islands
22	15 Aug 2021 18:00	139	Few people	No people	Marshall Islands
23	16 Aug 2021 00:00	139	Few people	No people	Marshall Islands
24	16 Aug 2021 06:00	139	Few people	No people	Marshall Islands
25	16 Aug 2021 12:00	139	Few people	No people	Marshall Islands
26	16 Aug 2021 18:00	139	Few people	No people	Marshall Islands
27	17 Aug 2021 00:00	130	Few people	No people	Marshall Islands
28	17 Aug 2021 06:00	37	Few people	No people	Marshall Islands
29	19 Aug 2021 12:00	74	10 thousand	No people	Japan, Marshall Islands
30	19 Aug 2021 18:00	83	1.3 million	No people	Japan, Marshall Islands
31	20 Aug 2021 00:00	83	430 thousand	No people	Japan, Marshall Islands
32	20 Aug 2021 06:00	74	60 thousand	No people	Japan, Marshall Islands
33	20 Aug 2021 12:00	74	110 thousand	No people	Japan, Marshall Islands
34	20 Aug 2021 18:00	74	170 thousand	No people	Japan, Republic of Korea, Marshall Islands
35	21 Aug 2021 00:00	93	11.7 million	No people	Japan, Republic of Korea, Marshall Islands

Bulletin Timeline

N°	Date (UTC)	Category (SSHS)	Max winds (km/h)	Population in Cat.1 or higher	Population in Tropical Storm or higher	Location (lat, lon)	Countries
1	10 Aug 2021 12:00	Tropical depression	46	no people	no people	12.2, 179
2	10 Aug 2021 18:00	Tropical depression	56	no people	no people	12.3, 178
3	11 Aug 2021 00:00	Tropical depression	56	no people	no people	12.3, 177.2
4	11 Aug 2021 06:00	Tropical depression	56	no people	no people	12.4, 176.6
5	11 Aug 2021 12:00	Tropical depression	56	no people	no people	12.1, 175.9
6	11 Aug 2021 18:00	Tropical depression	56	no people	no people	12.1, 175
7	12 Aug 2021 00:00	Tropical depression	46	no people	no people	12.1, 174
8	12 Aug 2021 06:00	Tropical depression	46	no people	no people	12.8, 172.7
9	12 Aug 2021 12:00	Tropical depression	56	no people	no people	12.6, 171.3
10	12 Aug 2021 18:00	Tropical depression	56	no people	no people	12.6, 169.9
11	13 Aug 2021 00:00	Tropical storm	65	no people	no people	12.7, 168.6
12	13 Aug 2021 06:00	Tropical storm	65	no people	no people	12.8, 167
13	13 Aug 2021 12:00	Tropical storm	65	no people	no people	12.8, 166.2
14	13 Aug 2021 18:00	Tropical depression	56	no people	no people	12.5, 164.9
15	14 Aug 2021 00:00	Tropical depression	56	no people	no people	12.5, 163.2
16	14 Aug 2021 06:00	Tropical storm	65	no people	<1000 people	12.3, 161.7
17	14 Aug 2021 12:00	Tropical storm	65	no people	no people	12.3, 160.3
18	14 Aug 2021 18:00	Tropical storm	65	no people	no people	12.3, 159
19	15 Aug 2021 00:00	Tropical depression	56	no people	no people	12.5, 157
20	15 Aug 2021 06:00	Tropical depression	56	no people	no people	12.7, 154.7
21	15 Aug 2021 12:00	Tropical depression	46	no people	no people	12.8, 154.4
22	15 Aug 2021 18:00	Tropical depression	46	no people	no people	12.9, 152.9
23	16 Aug 2021 00:00	Tropical depression	46	no people	no people	13.1, 151.3
24	16 Aug 2021 06:00	Tropical depression	37	no people	no people	13.6, 149.8
25	16 Aug 2021 12:00	Tropical depression	37	no people	no people	13.5, 148.2
26	16 Aug 2021 18:00	Tropical depression	37	no people	no people	12.9, 146.3
27	17 Aug 2021 00:00	Tropical depression	37	no people	no people	13.3, 145.1
28	17 Aug 2021 06:00	Tropical depression	37	no people	no people	13.4, 143.9
29	19 Aug 2021 12:00	Tropical depression	46	no people	no people	18.4, 132.9
30	19 Aug 2021 18:00	Tropical depression	56	no people	no people	18.5, 132.2
31	20 Aug 2021 00:00	Tropical depression	56	no people	no people	19, 130.9
32	20 Aug 2021 06:00	Tropical depression	56	no people	no people	19.1, 130.1
33	20 Aug 2021 12:00	Tropical depression	56	no people	no people	19.2, 129.5
34	20 Aug 2021 18:00	Tropical storm	65	no people	no people	20, 129.1
35	21 Aug 2021 00:00	Tropical storm	83	no people	no people	21.4, 128.2
35	21 Aug 2021 12:00	Tropical storm	93	no people	99000 people	23.3, 126.7
35	22 Aug 2021 00:00	Tropical storm	93	no people	99000 people	25, 125.4	Japan
35	22 Aug 2021 12:00	Tropical storm	83	no people	no people	27.1, 124.8
35	23 Aug 2021 00:00	Tropical storm	65	no people	11.7 million people	29.6, 124.5
35	24 Aug 2021 00:00	Tropical depression	37	no people	no people	36.6, 128.9	Republic of Korea

Actual track of the current bulletin

The alert for forecast greater than 3 days is limited to Orange level.

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Exposed population - AoIs

Exposed population in the potential affected countries, provinces and populated places

Countries

Country
Japan
South Korea
Marshall Is.

Provinces

Region Province	Country
Okinawa	Japan
Cheju-do	Republic of Korea
Cholla-namdo	Republic of Korea
Kyongsang-namdo	Republic of Korea
Kwangju-jikhalsi	Republic of Korea
Pusan-jikhalsi	Republic of Korea
Cholla-bukto	Republic of Korea
Kyongsang-bukto	Republic of Korea
Taegu-jikhalsi	Republic of Korea
Ch'ungch'ong-namdo	Republic of Korea
Ch'ungch'ong-bukto	Republic of Korea
Kangwon-do	Republic of Korea
Marshall Is.	Marshall Islands

Populated places

Name	Region Province	Country	City class	Population
Ishigaki	Okinawa	Japan	City	45000 people
Moseulpo	Cheju-Do	Republic of Korea	City	-
Cheju	Cheju-Do	Republic of Korea	City	330000 people
Yeosu	Chollanam-Do	Republic of Korea	City	200000 people
Samcheongpo	Kyongsangnam-Do	Republic of Korea	City	-
Suncheon	Chollanam-Do	Republic of Korea	City	190000 people
Sacheon	Kyongsangnam-Do	Republic of Korea	City	67000 people
Chinhae	Kyongsangnam-Do	Republic of Korea	City	130000 people
Jinju	Kyongsangnam-Do	Republic of Korea	City	-
Kwangju	Kwangju	Republic of Korea	Major city	1.2 million people
Masan	Kyongsangnam-Do	Republic of Korea	City	350000 people
Daegu	Taegu	Republic of Korea	Major city	2.6 million people
Gyeongju	Kyongsangbuk-Do	Republic of Korea	City	-
Yangmog	Kyongsangbuk-Do	Republic of Korea	City	-
Pohang	Kyongsangbuk-Do	Republic of Korea	City	300000 people
Gimcheon	Kyongsangbuk-Do	Republic of Korea	City	-
Gumi	Kyongsangbuk-Do	Republic of Korea	City	-
Yeongdong	Chungchongbuk-Do	Republic of Korea	City	-
Andong	Kyongsangbuk-Do	Republic of Korea	City	130000 people
Yecheon	Kyongsangbuk-Do	Republic of Korea	City	-

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)
Hirara	MMY	45	Civ.	Paved	Yes	6500
Shimojishima	SHI	16	Civ.	Paved	Yes	9800
		9				0
Ishigaki	ISG	26	Civ.	Paved	Yes	4900
Aviation College 2		360				0
Cheju International	CJU	38	Civ.	Paved	Yes	9800
Yeosu	SYS	21	Civ.	Paved	Yes	5000
Yosu	RSU	unknown				0
Geoje Heliport	JGE	unknown				0
Sachon	HIN	8	Mil.	Paved	Yes	8900
R 813	CHF	2	Mil.	Paved	No	3600
Pusan Gimhae International	PUS	4	Civ.	Paved	Yes	8900
R 802		34				0
Onyang Highway Strip		100				0
R 806		26				0
Daegu AB	TAE	35	Mil.	Paved	Yes	9000
Chonju	CHN	unknown				0
Pohang	KPO	21	Mil.	Paved	Yes	7000
R 522		166				0
Yechon AB	YEC	108	Mil.	Paved	Yes	8900
Enewetak Aux Af	ENT	4	Mil.	Paved	No	7700

Ports

Name	LOCODE	Country
Myako Island		Japan
Hirara		Japan
Ishigaki		Japan
Ishigaki Island		Japan
Sonsan Po		South Korea
Cheju	KRCHA	South Korea
Kumnyong		South Korea
Yosu	KRYOS	South Korea
Samcheon Po		South Korea
Okpo	KROKP	South Korea
Chinhai		South Korea
Masan	KRMAS	South Korea
Pohang	KRKPO	South Korea
Ulchin		South Korea
Eniwetok		Marshall Islands

Dams

Reservoir	Dam Name	River	Year
Sokobaru	Sokobaru	Sokobarugawa	1992
Maezato	Maezato	Miyaragawa	1982
Nagura	Nagura	Naguragawa	1996
	Yangchon	Trib. Samsan	1961
	Samjung	Trib. Samjung	1985
	Suo	Suo	1978
	Isacheon	Isa	1992
	Namgang	Nam	1970
Junam Reservoir	Junam	Chuchon	1958
	Hapchon	Wi	1989
	Talchang	Chachon	n/a
	Unmun	Tongchang	n/a
	Munchon	Kumho	1959
	Songju	Taega	n/a
	Angye	Taehwa	1971
	Yongchon	Trib. Angye	1959
	Sanmak	Yeongdong	1963
	Otae	Trib. Dong	1959
	Imha	Panbyon	1993
	An Dong	Nakdong	1977

Nuclear plants

Name	Country	Reactors
ULCHIN	REPUBLIC OF KOREA	6

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Rainfall

Rainfall accumulation of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.

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The JRC has developed an experimental global storm surge model. 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.

Locations affected by Storm surge (0 locations). Calculation based on advisory number 4 of 11 Aug 2021 06:00:00 UTC. (Simulation using 0.5 minute resolution)

Alert

Date (UTC)

Name

Country

Storm surge height (m)