Tropical Storm Aere (2016)

Severe Tropical Storm Aere (Julian)

Severe tropical storm (JMA scale)
Tropical storm (Saffir–Simpson scale)
Severe Tropical Storm Aere near peak intensity on October 7
Formed	October 4, 2016
Dissipated	October 14, 2016
(Remnant low after October 10, and re-generated on October 13)
Highest winds	10-minute sustained: 110 km/h (70 mph) 1-minute sustained: 100 km/h (65 mph)
Lowest pressure	975 hPa (mbar); 28.79 inHg
Fatalities	35 total
Damage	$112 million (2016 USD)
Areas affected	Philippines, Taiwan, South China, Vietnam, Laos, Thailand, Cambodia
Part of the 2016 Pacific typhoon season

Severe Tropical Storm Aere, known in the Philippines as Tropical Storm Julian, was a long-lived tropical cyclone that struck Central Vietnam in October 2016. The nineteenth named storm of the annual typhoon season, Aere formed on October 4, 2016 as a tropical depression to the east of Luzon, Philippines shortly after the JMA had started tracking Songda. On the next day, the system had become a tropical storm and it moved into South China Sea. During October 7, it intensified into a severe tropical storm and reached peak intensity with 10-minute winds of 110 km/h (70 mph). Shortly thereafter, due to remaining in almost the same area for hours, Aere began to weaken to a tropical storm, and on October 10, it weakened to a tropical depression, before weakening to a low-pressure area late on October 11. On October 13, Aere re-generated into a tropical depression and it made landfall in Huế, Vietnam late that day. The system moved towards Laos and Thailand before it fully dissipated on October 14.

Aere affected parts of Southeast Asia in October 2016, but its impact was most severe in Vietnam. Heavy flooding triggered by the remnants of Aere from October 13 to October 17, 2016 in North-Central Vietnam caused severe damage. A total of 35 people were killed and total damage reached US$112 million. The remnants of Aere also caused heavy rains in northeast Thailand.

At the start of October 2016, a broad area of atmospheric convection persisted, to the east-southeast of Anderson Air Force Base on Guam. The system was located within a favourable environment for further development, with low vertical wind shear and warm sea surface temperatures. Over the next couple of days the system moved north-westwards and started to consolidate, as it developed a low level circulation centre. It was subsequently classified as a tropical depression during October 4, by the Japan Meteorological Agency (JMA), while it was located about 1,000 km (620 mi) to the northeast of Manila in the Philippines, to the east to the Babuyan Group of Islands. Later that day, PAGASA had named the system Julian. The JTWC started issuing advisories on the system while it moved westward during October 5, with the designation of 22W. Despite Julian having a disorganised structure while crossing the Luzon Strait, the system was located in an area of light to moderate wind shear and very warm sea surface temperatures. After satellite imagery had depicted a significant increase of convection, all agencies upgraded Julian to a tropical storm, with the JMA naming it as Aere. Hours later, when Aere had emerged to the extreme northern part of the South China Sea, Aere reached peak intensity with 10-minute winds of 110 km/h (70 mph), just shy of typhoon strength, after it remained nearly stationary between two subtropical ridges. Shortly thereafter, due to remaining in almost the same area for hours, Aere began to weaken and the JMA downgraded it to a tropical storm. By October 10, Aere's LLCC became exposed due to southwesterly wind shear and both the JMA and JTWC issued their final advisory three hours later. The JMA tracked its remnants as it moved southwestward until it weakened to a low-pressure area late on October 11.