Overall Green Tropical Cyclone alert for YUN-YEUNG-23 in Japan from 05 Sep 2023 12:00 UTC to 18:00

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 Green alert Tropical Cyclone for YUN-YEUNG-23

in Japan

05 Sep 2023 18 UTC

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Meteorological source:

GDACS JTWC

Impact Single TC

GFS
HWRF
ECMWF

Impact based on all weather systems in the area

Impact

Tropical Cyclone YUN-YEUNG-23 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	74 km/h
Maximum storm surge	0.2 m (07 Sep 23:00 UTC)
Vulnerability	Low (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	102 km/h	0.2 m	n.a.	0.5
Overall	74 km/h	0.2 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

102 km/h Current Max.

Up to 940000 people in Tropical Storm strength or higher (see SSHS)

Impact Timeline

Alert	N°	Date (UTC)	Max Winds (km/h)	Population in Tropical Storm or higher	Population in Cat 1. or higher	Countries
	1	05 Sep 2023 12:00	102	60 thousand	No people	Japan
	2	05 Sep 2023 18:00	102	940 thousand	No people	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)
1	05 Sep 2023 12:00	Tropical depression	46	no people	no people	22.9, 132.4
2	05 Sep 2023 18:00	Tropical depression	56	no people	no people	23.9, 133.1
2	06 Sep 2023 06:00	Tropical storm	65	no people	no people	26, 134.6
2	06 Sep 2023 18:00	Tropical storm	74	no people	no people	28.1, 136.4
2	07 Sep 2023 06:00	Tropical storm	93	no people	<1000 people	30, 138.3
2	07 Sep 2023 18:00	Tropical storm	102	no people	940000 people	31.6, 139.8
2	08 Sep 2023 18:00	Tropical storm	83	no people	930000 people	34.4, 141.7
2	09 Sep 2023 18:00	Tropical storm	65	no people	no people	36.2, 144.1
2	10 Sep 2023 18:00	Tropical depression	46	no people	no people	37, 146.8

Actual track of the current bulletin

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

Download:

Exposed population - AoIs

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

Countries

Country	Population in Tropical Storm or higher strength
Japan	880000 people

Provinces

Region Province	Country	Population in Tropical Storm or higher strength
Kanto	Japan	880000 people

Populated places

Name	Region Province	Country	City class	Population
Mitsune	Shizuoka	Japan	City	-
Tateyama	Chiba	Japan	City	49000 people
Chikura	Chiba	Japan	City	-
Ohara	Chiba	Japan	City	20000 people
Mobara	Chiba	Japan	City	96000 people
Katakai	Chiba	Japan	City	-
Naruto	Chiba	Japan	City	22000 people
Choshi	Chiba	Japan	City	84000 people

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)
Hachijo Jima	HAC	92	Civ.	Paved	Yes	5900
Miyake Jima	MYE	20	Civ.	Paved	Yes	3900
Tateyama		3				0

Ports

Name	LOCODE	Country
Tori Island		Japan
Aoga Island		Japan
Yaene		Japan
Mikura		Japan
Miyake		Japan
Tateyama	JPTTY	Japan
Katsuura Ko		Japan
Choshi	JPCHO	Japan

Dams

Reservoir	Dam Name	River	Year
Sakuma	Sakuma	Okuzuregawa	1990
Kameyamako	Kameyama	Obitsugawa	1980
Takatakiko	Takataki	Yorogawa	1990

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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

0.2 m

The maximum Storm surge height is 0.2m in Aogashima, Japan. This height is estimated for 07 Sep 2023 23:00 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 (30 locations). Calculation based on advisory number 2 of 05 Sep 2023 18:00:00 UTC. (Simulation using 6 minute resolution)

Alert	Date (UTC)	Name	Country	Storm surge height (m)
	07 Sep 2023 23:00	Aogashima	Japan	0.2
	07 Sep 2023 23:00	Yasundogo	Japan	0.2
	09 Sep 2023 00:00	Hokota	Japan	0.1
	09 Sep 2023 00:00	Katsuori	Japan	0.1
	09 Sep 2023 00:00	Taiyo	Japan	0.1
	09 Sep 2023 00:00	Otake	Japan	0.1
	09 Sep 2023 00:00	Dainigorisawa	Japan	0.1
	09 Sep 2023 00:00	Muyokama	Japan	0.1
	09 Sep 2023 00:00	Omi	Japan	0.1
	09 Sep 2023 00:00	Kyochikama	Japan	0.1
	09 Sep 2023 00:00	Hamatsuga	Japan	0.1
	09 Sep 2023 00:00	Aotsuka	Japan	0.1
	09 Sep 2023 00:00	Kyuchu	Japan	0.1
	09 Sep 2023 00:00	Kashima	Japan	0.1
	09 Sep 2023 00:00	Koya	Japan	0.1
	09 Sep 2023 00:00	Asahi Yokaichiba	Japan	0.1
	09 Sep 2023 00:00	Okunoya	Japan	0.1
	09 Sep 2023 00:00	Yatabe	Japan	0.1
	09 Sep 2023 01:00	Choshi	Japan	0.1
	09 Sep 2023 01:00	Asahi	Japan	0.1
	09 Sep 2023 01:00	Oyagaw	Japan	0.1
	09 Sep 2023 01:00	Ogushi	Japan	0.1
	09 Sep 2023 01:00	Natsumi	Japan	0.1
	09 Sep 2023 01:00	Kamigama	Japan	0.1
	09 Sep 2023 01:00	Noda	Japan	0.1
	09 Sep 2023 01:00	Nagasuna	Japan	0.1
	09 Sep 2023 01:00	Shirane	Japan	0.1
	09 Sep 2023 01:00	Toyooka	Japan	0.1
	09 Sep 2023 01:00	Kuji	Japan	0.1
	09 Sep 2023 01:00	Nakaminato	Japan	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.