Typhoon Chaba (2016)

Typhoon Chaba, known in the Philippines as Super Typhoon Igme, was the fourth most intense tropical cyclone in 2016 and the strongest tropical cyclone to make landfall in South Korea since Sanba in 2012. Chaba also caused 7 deaths in the country. Typhoon Chaba was the eighteenth named storm and the eighth typhoon of the 2016 Pacific typhoon season. Chaba originated as a depression around the east-northeast of Guam. Being in a marginally favorable environment, JMA proceeds to name the system as ''Chaba''. On September 28, JTWC gave its identifier as ''Tropical Depression 21W''. Its LLCC starts to improve, prompting the JTWC to upgrade into a tropical storm. Chaba entered the Philippine Area of Responsibility, receiving the name ''Igme'' as it moved northwestwards. Chaba became more symmetrical which later ensued its rapid intensification.

Chaba later reached the peak intensity of 1-minute sustained winds of 280 km/h (175 mph) and a central pressure of 911 hPa (26.90 inHg), equivalent to a Category-5 super typhoon. Shortly after this, Chaba began to weaken into a Category-4 typhoon as it moved over the Yellow Sea on October 4. At 10:00 a.m. KST (01:00 UTC), Chaba made landfall in Busan as a weakening Category-1 typhoon. Shortly after landfall, it transitioned into an extratropical cyclone which prompted the JMA to issue its final advisory.

Meteorological history

On September 26, a tropical depression developed approximately east-northeast of Guam. Despite a marginally favorable environment, the Japan Meteorological Agency (JMA) upgraded the system to a tropical storm and assigned it the name ''Chaba'' late the next day. Early on September 28, the Joint Typhoon Warning Center (JTWC) gave the identifier of ''21W''. Flaring convection and improved overall convective structure prompted the JTWC to upgrade it to a tropical storm. By September 30, Chaba had intensified into a severe tropical storm after deep convection had evolved into a banding feature and very favorable conditions such as very low wind shear and sea surface temperatures (SSTs) of about 30 degrees Celsius. On October 1, Chaba entered the Philippine area of responsibility, with PAGASA assigning the local name ''Igme'', as it started to move in a northwestward direction. Several hours later, both agencies upgraded Chaba to a typhoon after its organization and structure had vastly improved. During the next day, Chaba became more symmetric as feeder bands wrapped into its deep central convection, signalling the onset of explosive intensification.

Continuing its strengthening trend, Chaba reached Category 5 super typhoon intensity with a sharp wide eye surrounded by a very intense convective core due to very warm SSTs. On October 3, Chaba reached its peak intensity with 10-minute sustained winds of , 1-minute sustained winds of , and a minimum central pressure of 905 mbar. Thereafter, the JTWC stated that Chaba began weakening, as its core became asymmetric, and Chaba weakened to a strong Category 4 typhoon by October 4. Later, significant weakening led the JTWC to downgrade Chaba further to a Category 2 typhoon, due to interaction with strong north-northeasterly winds. At 10:00 a.m. KST (01:00 UTC), Chaba struck Geojedo and then made landfall in Busan an hour later with winds of . At that time, Chaba started to undergo extratropical transition and the JTWC issued its final advisory a few hours later, while downgrading the system to a tropical storm. At the same time, the JMA downgraded Chaba to a severe tropical storm. Six hours later, the JMA issued its final advisory, as Chaba became extratropical.

Preparations and impact

EVA Air and China Airlines canceled flights to Okinawa that had been scheduled for 3 October, which was the day the typhoon was forecast to impact Okinawa. EVA Air had previously been criticized for operating flights to destinations affected by typhoons a week earlier, when Typhoon Megi was affecting the region.

The storm left widespread damage across the southern regions of South Korea, killing at least 7 and leaving 3 missing. Transportation was disrupted, with hundreds of flights canceled, while more than 220,000 households lost electricity. Chaba was the strongest typhoon to strike the country since Sanba. Flooding was also reported in the southern South Korea cities of Ulsan, Gyeongju, and Busan. Damages were reported at  billion (US$129 million).

See also

* Weather of 2016
* Tropical cyclones in 2016
* Typhoon Emma (1956) – which took a similar track to Sarah.
* Typhoon Sarah (1959) – one of the deadliest typhoons on record.
* Typhoon Maemi (2003) – the most powerful typhoon to strike South Korea since record-keeping in 1904
* Typhoon Sanba (2012) – a powerful and damaging typhoon that made landfall over South Korea in September 2012
* Typhoon Hinnamnor (2022) – a much more damaging typhoon that impacted South Korea in September 2022.

References

External links

Track of Typhoon Chaba (1618)
from Digital Typhoon
JMA Best Track Data
of Typhoon Chaba (1618) -->
21W.CHABA
from the U.S. Naval Research Laboratory

{{DEFAULTSORT:Chaba (2016)
2016 Pacific typhoon season
Typhoons in Japan
Typhoons in South Korea
Chaba