Overall Green Tropical Cyclone alert for CHAN-HOM-20 in Japan from 04 Oct 2020 18:00 UTC to 06 Oct 2020 00:00 UTC

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GDACS JTWC

Impact Single TC

Impact based on all weather systems in the area

Impact

Tropical Cyclone CHAN-HOM-20 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

Meteorological source	GDACS
Exposed countries	Japan
Exposed population	No people in Category 1 or higher
Maximum wind speed	148 km/h
Maximum storm surge	0.6 m (01 Jan 00:00 UTC)
Vulnerability	Low (Japan)
Landfall	between 09 Oct 2020 00:00 - 10 Oct 2020 00:00 in Japan

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	148 km/h	0.6 m	n.a.	0.5
Overall	148 km/h	0.6 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

148 km/h Current Max.

Up to 100000 people in Category 1 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	04 Oct 2020 18:00	157	10.2 million	10 thousand	Japan
2	05 Oct 2020 00:00	157	13.2 million	40 thousand	Japan
3	05 Oct 2020 06:00	157	24.2 million	No people	Japan
4	05 Oct 2020 12:00	157	25.7 million	No people	Japan
5	05 Oct 2020 18:00	157	34.3 million	40 thousand	Japan
6	06 Oct 2020 00:00	148	57.3 million	100 thousand	Japan

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	04 Oct 2020 18:00	Tropical depression	46	no people	no people	22.5, 139.2
2	05 Oct 2020 00:00	Tropical storm	65	no people	no people	22.6, 139
3	05 Oct 2020 06:00	Tropical storm	65	no people	no people	22.3, 139
4	05 Oct 2020 12:00	Tropical storm	65	no people	no people	23, 139.2
5	05 Oct 2020 18:00	Tropical storm	74	no people	no people	23.5, 139.2
6	06 Oct 2020 00:00	Tropical storm	83	no people	no people	23.9, 138.4
6	06 Oct 2020 12:00	Tropical storm	93	no people	no people	24.4, 137.2
6	07 Oct 2020 00:00	Tropical storm	111	no people	95000 people	25, 135.3
6	07 Oct 2020 12:00	Category 1	120	no people	1.8 million people	26, 133.3
6	08 Oct 2020 00:00	Category 1	130	55000 people	13.4 million people	27, 132
6	09 Oct 2020 00:00	Category 1	148	76000 people	15.9 million people	28.8, 130.3
6	10 Oct 2020 00:00	Category 1	120	45000 people	56 million people	30.3, 130.4	Japan
6	11 Oct 2020 00:00	Tropical storm	93	no people	no people	32.4, 134.4

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

Provinces

Region Province	Country
Kyushu	Japan

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)
Kikai		6	Civ.	Paved	Yes	3900
Amami O Shima	ASJ	8	Civ.	Paved	Yes	6500
Tanegashima	TNE	97	Civ.	Paved	Yes	4900
Yakushima	KUM	37	Civ.	Paved	Yes	4900
Nishinoomote	IIN	unknown				0

Ports

Name	LOCODE	Country
Tokara Island		Japan

Dams

Reservoir	Dam Name	River	Year
Saikyo	Saikyo	Matanobugawa	1984

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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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StormSurge

0.6 m

The maximum Storm surge height is 0.6m in Segire, Japan. This height is estimated for UTC .

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 (77 locations). Calculation based on advisory number of 04 Oct 2020 18:00:00 UTC. (Simulation using minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
		Segire	Japan	0.6
		Kurio	Japan	0.6
		Nakama	Japan	0.5
		Nagata	Japan	0.5
		Kanda	Japan	0.5
		Tsunemi	Japan	0.5
		Yudomari	Japan	0.4
		Zhenhai	China	0.4
		Jiangjia	China	0.4
		Yukuhashi	Japan	0.4
		Daniwan	China	0.4
		Ligang	China	0.4
		Beiqigen	China	0.4
		Beilungang	China	0.4
		Nan'ao	China	0.4
		Ch'en-chia-lu	China	0.4
		Shigaotang	China	0.4
		Gaoting	China	0.4
		Nanfeng	China	0.4
		Hirauchi	Japan	0.4
		Kojima	Japan	0.4
		Xiaoli'ao	China	0.4
		Guoju	China	0.4
		Dinghai	China	0.4
		Chofu	Japan	0.4
		Onoaida	Japan	0.4
		Changtu	China	0.4
		Moji	Japan	0.4
		Shimonoseki	Japan	0.4
		Chung-tse	China	0.4
		Da'ao	China	0.4
		Chiao-t'ou	China	0.4
		P'u-t'o	China	0.3
		T'ien-hou-kung	China	0.3
		Nan 'ao	China	0.3
		Chou-hung-ch'iu	China	0.3
		Xining	China	0.3
		Lusi	China	0.3
		Hsiung-ting-yu	China	0.3
		Hsiao-an-chieh	China	0.3
		Hsieh-t'ang	China	0.3
		Haro	Japan	0.3
		Mugyu	Japan	0.3
		Ta-ch'u	China	0.3
		Kagawa	Japan	0.3
		Donggangcun	China	0.3
		Litang	China	0.3
		Tabe	Japan	0.3
		Tiantu	China	0.3
		Ganpu	China	0.3
		Huangwan	China	0.3
		Fangang	China	0.3
		Nakatsu	Japan	0.3
		Beikan	China	0.3
		Chiu-hsiang-chen	China	0.3
		Ta-chan	China	0.3
		Bianjiao'ao	China	0.3
		Chaoyang	China	0.3
		Luomen	China	0.3
		Dingqiao	China	0.3
		Higashiyoshitomi	Japan	0.3
		Changchuanba	China	0.3
		Qiancang	China	0.3
		Danmen	China	0.3
		Imazu	Japan	0.3
		Nanqinghe	China	0.3
		Niu-ch'iao-shih	China	0.3
		T'ai-an-chen	China	0.3
		Daxingzhen	China	0.3
		Ambo	Japan	0.3
		Funayuki	Japan	0.2
		Sanshan	China	0.2
		Nanbu	China	0.2
		Youcheqiao	China	0.2