Tropical Storm Yun-yeung

{{Storm path|Yun-yeung 2023 path.png|colors=new}}On 6:00 UTC on September 4, the Joint Typhoon Warning Center (JTWC) began tracking a low-pressure area far east of Luzon.{{Cite web |title=Tropical Storm 12W (Yun-yeung) Best Track Data |url=https://www.ssd.noaa.gov/PS/TROP/DATA/ATCF/JTWC/bwp122023.dat |access-date=3 June 2024 |website=National Oceanic and Atmospheric Administration |archive-date=16 November 2023 |archive-url=https://web.archive.org/web/20231116122952/https://www.ssd.noaa.gov/PS/TROP/DATA/ATCF/JTWC/bwp122023.dat |url-status=live }} As the disturbance was in a favorable environment with low vertical wind shear and warm SSTs of {{Convert|29-30|C|F|abbr=on}}, the JTWC issued a Tropical Cyclone Formation Alert (TCFA) on the system a day later.{{Cite JTWC|date=September 5, 2023|type=tcfa|designation=99W|time=02Z|url=https://archive.today/20230905042723/https://tgftp.nws.noaa.gov/data/raw/wt/wtpn21.pgtw..txt}} Soon after, the Japan Meteorological Agency (JMA) stated that the disturbance had developed into a tropical depression due to Dvorak readings.{{Cite web |date=2023-09-04 |title=RSMC TROPICAL CYCLONE PROGNOSTIC REASONING REASONING NO. 1 FOR TD LOCATED AT 20.0N 129.9E |url=https://tgftp.nws.noaa.gov/data/raw/wt/wtpq30.rjtd..txt |access-date=2024-07-04 |website=Japan Meteorological Agency |archive-date=2023-09-04 |archive-url=https://archive.today/20230904033021/https://tgftp.nws.noaa.gov/data/raw/wt/wtpq30.rjtd..txt |url-status=bot: unknown }} At the time, the disturbance was located in the Philippine Area of Responsibility (PAR), causing the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) to designate the system as a tropical depression, naming it Ineng.{{Cite web |last= |date=September 2023 |title=PAGASA Tropical Cyclone Bulletins for Tropical Cyclone Ineng, 23-TC09|url=https://archive.org/details/pagasa-23-TC09/PAGASA_23-TC09_Ineng_TCB%2305-FINAL |access-date=2024-06-05 |website=PAGASA |language=en}}

Tracking northwestward due to the influence of a subtropical ridge,{{Cite JTWC|date=6 Sep 2023|type=prognostic|category=TS|designation=12W|no=3|name=Yun-yeung|time=03Z|url=https://archive.today/20230906042722/https://tgftp.nws.noaa.gov/data/raw/wd/wdpn31.pgtw..txt}} on 18:00 UTC on September 5, both the JTWC and JMA recognized the system as a tropical cyclone, with the latter agency naming it Yun-yeung as according to them, it had gale-force winds at the time.{{Cite web |title=YUN-YEUNG (2313) TROPICAL CYCLONE BEST TRACK |url=https://tgftp.nws.noaa.gov/data/raw/ax/axpq20.rjtd..txt |archive-url=https://archive.today/20231130080120/https://tgftp.nws.noaa.gov/data/raw/ax/axpq20.rjtd..txt |archive-date=30 November 2023 |website=Japan Meteorological Agency}} The next day, the JTWC upgraded Yun-yeung into a tropical storm. Later that day, the depression exited the PAR, causing PAGASA to cease advisories on the system. Yun-yeung steadily intensified, and early on September 7, the JMA's surface observations and Dvorak intensity estimates revealed that it had peaked with 10-minute sustained winds of {{Convert|70|km/h|mph|abbr=on|round=5}}.{{Cite web |date=2023-09-08 |title=RSMC TROPICAL CYCLONE PROGNOSTIC REASONING REASONING NO. 17 FOR TS 2313 YUN-YEUNG (2313) |url=https://tgftp.nws.noaa.gov/data/raw/wt/wtpq30.rjtd..txt |access-date=2024-07-04 |website=Japan Meteorological Agency |archive-date=2023-09-08 |archive-url=https://archive.today/20230908033444/https://tgftp.nws.noaa.gov/data/raw/wt/wtpq30.rjtd..txt |url-status=bot: unknown }}

Due to a binary interaction with the remnants of Kirogi, Yun-yeung began to slow down and track slightly south, crossing into an environment with wind shear in excess of {{Convert|70|km/h|mph|abbr=on|round=5}}. Despite that, due to the system's diffluent outflow, conditions were still favorable for the system to intensify.{{Cite JTWC|date=7 Sep 2023|type=prognostic|category=TS|designation=12W|no=8|name=Yun-yeung|time=09Z|url=https://archive.today/20230907093021/https://tgftp.nws.noaa.gov/data/raw/wd/wdpn31.pgtw..txt}} As a result, later that day, it peaked with 1-minute sustained winds of {{Convert|80|km/h|mph|abbr=on|round=5}} according to the JTWC. It began drifting eastward instead of north-eastward, rapidly weakening due to the increasing shear.{{Cite JTWC|date=8 Sep 2023|type=prognostic|category=TS|designation=12W|no=12|name=Yun-yeung|time=09Z|url=https://archive.today/20230908093348/https://tgftp.nws.noaa.gov/data/raw/wd/wdpn31.pgtw..txt#selection-9.3466-9.3476}} On September 8, Yun-yeung made landfall as a weak tropical depression along the northern shoreline of Suruga Bay, degenerating into a wave-like feature.{{Cite JTWC|date=8 Sep 2023|type=warning|category=TD|designation=12W|no=14|name=Yun-yeung|time=21Z|url=https://archive.today/20230909141631/https://tgftp.nws.noaa.gov/data/raw/wt/wtpn31.pgtw..txt}} The JTWC kept monitoring it until it had degenerated into a remnant low the net day.

File:2023_JTWC_12W_IR_satellite_imagery.jpg

When Yun-yeung was initially developing far from the Philippines, it with Haikui primarily enhanced the southwest monsoon, causing heavy rains in portions of Luzon.{{cite web |title='Ineng' exits PAR, but continues to influence 'habagat' |url=https://www.philstar.com/headlines/2023/09/06/2294242/ineng-exits-par-continues-influence-habagat |website=philstar.com |publisher=Philstar Global |access-date=6 June 2024 |date=2023-09-06 |archive-date=2024-06-03 |archive-url=https://web.archive.org/web/20240603141717/https://www.philstar.com/headlines/2023/09/06/2294242/ineng-exits-par-continues-influence-habagat |url-status=live }} PAGASA issued a gale warning for the seaboards of portions of Northern Luzon due to the system. Yun-yeung itself caused scattered showers in Batanes, Abra, Apayao, Cagayan and Isabela.{{Cite news |date=September 6, 2023 |title=Ineng exits PAR but 'habagat' to bring rains in next 3 days |url=https://www.pna.gov.ph/articles/1209292 |work=Philippine News Agency |access-date=June 4, 2024 |archive-date=June 4, 2024 |archive-url=https://web.archive.org/web/20240604015048/https://www.pna.gov.ph/articles/1209292 |url-status=live }}

In the Chiba and Ibaraki prefectures, heavy rain was recorded, with record high levels of rain ({{Convert|371.5|mm|in|abbr=on}} in Mobara and {{Convert|249.5|mm|in|abbr=on}} in Kamogawa) seen on September 8. Some train lines were impacted in the Kanto region, since JR East suspended some lines and limited express trains.{{cite web | title=Tropical Storm Yun-yeung brings heavy rain to Kanto region | date=September 8, 2023 | access-date=September 8, 2023 | url=https://www.japantimes.co.jp/news/2023/09/08/japan/tropical-storm-heavy-rain/}} Additionally, rides in the Tokaido Line, Uchibo Line and Gaibo Line were temporarily suspended.{{Cite web |last= |first= |date=2023-09-08 |title=Typhoon Yun-yeung weakens into tropical depression |url=https://english.kyodonews.net/news/2023/09/e977a5675778-typhoon-yun-yeung-expected-to-make-landfall-fri-in-eastern-japan.html |access-date=2024-06-03 |website=Kyodo News+ |archive-date=2024-06-03 |archive-url=https://web.archive.org/web/20240603144435/https://english.kyodonews.net/news/2023/09/e977a5675778-typhoon-yun-yeung-expected-to-make-landfall-fri-in-eastern-japan.html |url-status=live }} Osaka recorded {{Convert|323|mm|in|abbr=on}} of rainfall. Due to the storm, nearly 10,000 households had temporarily lost power in Japan. Additionally, 32 local flights had to be cancelled due to Yun-yeung.{{Cite web |last=EFE |first=Agencia |date=2023-09-08 |title=Tropical storm causes heavy rain, flooding in eastern Japan |url=https://efe.com/en/other-news/2023-09-08/tropical-storm-causes-heavy-rain-flooding-in-eastern-japan/ |access-date=2024-06-03 |website=EFE Noticias |language=en-US |archive-date=2024-06-03 |archive-url=https://web.archive.org/web/20240603150637/https://efe.com/en/other-news/2023-09-08/tropical-storm-causes-heavy-rain-flooding-in-eastern-japan/ |url-status=live }}

In Shinjuku Station, water leaked in an underground passage and flooded around {{Convert|15|meter|ft}} of walkway.{{Cite web |title=Tropical storm Yun-yeung approaching central Japan {{!}} NHK WORLD-JAPAN News |url=https://www3.nhk.or.jp/nhkworld/en/news/backstories/2704/ |access-date=2024-06-03 |website=NHK WORLD |language=en |archive-date=2024-06-03 |archive-url=https://web.archive.org/web/20240603150637/https://www3.nhk.or.jp/nhkworld/en/news/backstories/2704/ |url-status=live }} Over 2,800 homes suffered some damage,{{Cite web |title=Digital Typhoon: Typhoon 202313 (YUN-YEUNG) - Disaster Information |url=http://agora.ex.nii.ac.jp/cgi-bin/dt/dsummary.pl?id=202313&basin=wnp&lang=en |access-date=2024-07-15 |website=agora.ex.nii.ac.jp |archive-date=2024-07-08 |archive-url=https://web.archive.org/web/20240708184102/http://agora.ex.nii.ac.jp/cgi-bin/dt/dsummary.pl?id=202313&basin=wnp&lang=en |url-status=live }} while 77 buildings were flooded.{{Cite news |date=2023-09-09 |title=2 dead, dozens of buildings flooded in 3 Japan prefs. in wake of Typhoon Yun-yeung |url=https://mainichi.jp/english/articles/20230909/p2a/00m/0na/003000c |access-date=2024-07-08 |work=Mainichi Daily News |language=en |archive-date=2024-07-08 |archive-url=https://web.archive.org/web/20240708184241/https://mainichi.jp/english/articles/20230909/p2a/00m/0na/003000c |url-status=live }} A total of 19 houses were destroyed. In Iwaki alone, 9 rivers overflowed their banks while at least 7 cars were submerged, Economic losses from the storm were in the tens of millions according to Aon.{{Cite web |last=Čejka |first=Tomáš |last2=Elizondo |first2=Antonio |last3=Hotový |first3=Ondřej |last4=Lörinc |first4=Michal |date=June 16, 2024 |title=2024 Climate and Catastrophe Insight |url=https://assets.aon.com/-/media/files/aon/reports/2024/climate-and-catastrophe-insights-report.pdf |access-date=June 16, 2024 |website=assets.aon.com |archive-date=June 3, 2024 |archive-url=https://web.archive.org/web/20240603055425/https://assets.aon.com/-/media/files/aon/reports/2024/climate-and-catastrophe-insights-report.pdf |url-status=live }} A total of 3 people died due to the storm.{{Cite web |date=2023-09-11 |title=Japan - Tropical Cyclone YUN-YEUNG, update (media, JMA, GDACS) (ECHO Daily Flash of 11 September 2023) - Japan {{!}} ReliefWeb |url=https://reliefweb.int/report/japan/japan-tropical-cyclone-yun-yeung-update-media-jma-gdacs-echo-daily-flash-11-september-2023 |access-date=2024-06-03 |website=reliefweb.int |language=en}} These were an elderly man who fell into a drainage ditch in Iwaki,{{Cite news |title=Elderly Man Dies as Typhoon Yun-yeung Wreaks Havoc in 3 Prefectures |url=https://japannews.yomiuri.co.jp/society/general-news/20230909-135606/ |date=2023-09-09 |access-date=2024-07-04 |work=The Yomiuri Shimbun |archive-date=2024-07-13 |archive-url=https://web.archive.org/web/20240713182346/https://japannews.yomiuri.co.jp/society/general-news/20230909-135606/ |url-status=live }} a young man who drowned in a river,{{Cite news |title=Missing Man Confirmed Dead Due to Typhoon Yun-yeung in Ibaraki Pref. |url=https://japannews.yomiuri.co.jp/society/general-news/20230909-135623/ |date=2023-09-09 |access-date=2024-07-04 |work=The Yomiuri Shimbun |archive-date=2024-07-15 |archive-url=https://web.archive.org/web/20240715184315/https://japannews.yomiuri.co.jp/society/general-news/20230909-135623/ |url-status=live }} and a police officer who fell off a building.

{{Reflist}}

• [https://www.ssd.noaa.gov/PS/TROP/DATA/ATCF/JTWC/bwp122023.dat JTWC Best Track Data]
• [https://archive.today/20231130080120/https://tgftp.nws.noaa.gov/data/raw/ax/axpq20.rjtd..txt JMA Best Track Data]
• [https://archive.org/details/pagasa-23-TC09/PAGASA_23-TC09_Ineng_TCB%2305-FINAL/ PAGASA Tropical Cyclone Bulletins]

Category:2023 Pacific typhoon season

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