Severe Tropical Storm Nanmadol, known in the Philippines as Severe Tropical Storm Emong, was a tropical cyclone that impacted southern Japan during July 2017. Nanmadol developed over in the Philippine Sea as a tropical depression on July 1, and strengthened into the third named storm of the 2017 typhoon season on July 3. After gaining organization, the system rapidly developed and intensified into a severe tropical storm and reached its peak intensity with a 10-minute maximum sustained winds of 100 km/h (65 mph) and a minimum barometric pressure of 985 hPa (29.09 inHg). On July 4, Nanmadol turned eastwards and made landfall near Nagasaki, Kyushu, just before it transitioned into an extratropical cyclone. Nanmadol dropped torrential rainfall across Kyushu, resulting in landslides, although the Fukuoka and Ōita Prefectures were the hardest hit. The city of Asakura, Fukuoka experienced a one-day rainfall surpassing the city's average total for July by 50%, with a rainfall of recorded within a 12-hour period on July 5. Landslides were recorded in 44 different locations and flooding in 38 locations, and from this, more than 2,600 homes were destroyed. In total, 42 people died from Nanmadol due to drowning from flash flooding or due to landslides. Total damages was estimated to have toppled to ¥190 billion (US$1.68 billion). Meteorological history During June 30, a tropical disturbance developed about 463 km (288 mi) to the north-northeast of Palau. Noting some organization within the system, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert (TCFA) early on July 1. Six hours later, the Japan Meteorological Agency (JMA) classified it as a tropical depression. Later that day, the JMA began to issue advisories, predicting that the system could intensify into a tropical storm within the next 24 hours. Shortly after, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) upgraded the system to a tropical depression, assigning the local name Emong. Early on July 2, the JMA upgraded the system to a tropical storm, and assigned the official name Nanmadol. The PAGASA also upgraded the system to a tropical storm. Soon after, the JTWC gave the system the internal designation of 05W. Satellite imagery depicted convective banding wrapping tightly into Nanmadol's low-level circulation center (LLCC), prompting the JTWC to upgrade it to a tropical storm in their next advisory. Nanmadol later entered a favorable environment with low vertical wind shear and high sea surface temperatures (SSTs)