Late on August 19, an area of low pressure developed north of Palau. Early on August 20, the system became more better organized and developed a low-level circulation center. The system then turned north and continued to drift north until on August 21, when the JMA upgraded the low pressure area to a tropical depression east of Philippines. The JTWC also issued a Tropical Cyclone Formation Alert (TCFA) on the system reporting that the system was becoming more well organized. Later that day, the PAGASA started monitoring the system as a tropical depression and named it "Mina". Late on August 22, the system became more well organized prompting the JTWC to initiate advisories on the system, designating it with "14W". On August 23, the JMA upgraded 14W to a tropical storm, naming it "Nanmadol". Overnight, the system continued to intensify and early on August 24, the JMA upgraded Nanmadol to a severe tropical storm. Later that day, convective banding improved and Nanmadol developed an eye-like feature. As a result, Nanmadol continued to intensify rapidly and became a typhoon, by midnight, that day. Nanmadol continued to drift northeast and made landfall over Gonzaga, Cagayan, Philippines with strong winds of over . Nanmadol weakened significantly after interacting with land and early on August 28, the JMA downgraded Nanmadol to a severe tropical storm. Late on August 28, Nanmadol made its second landfall over Taimali in the Taitung County of Taiwan and started weakening. Landfall weakened the system rapidly prompting the JMA to downgrade Nanmadol to a tropical storm with winds of under . Soon it started experiencing strong wind shear and continued weakening. The shear pushed convection about south of the LLCC. The system also accelerated towards China at and weakened to a minimal tropical storm. After its third landfall over Fujian, China, Nanmadol weakened rapidly prompting both the JTWC and the JMA to issue their final warnings on the system.
On August 27, five people died after Nanmadol caused landslides. At least two Filipino fishermen were reported to be missing after Nanmadol's strong winds whipped up large waves.
Late on August 22, an area of low pressure developed to the west of Guam. At midnight that day, the system became sufficiently well organized that the JMA started tracking it as a tropical depression. On August 23, the system moved into an environment of low wind shear and warm sea surface temperatures prompting the JTWC to issued a TCFA on it. By August 25, the system grew strong enough that the JMA upgraded it to a tropical storm, naming it "Talas". Later that day, the JTWC followed suit and initiated advisories on Talas. Talas continued to strengthen and by midnight that day, it became a severe tropical storm. Over the next few days, Talas continued to drift north very slowly until late on August 29, when the JMA upgraded Talas to a typhoon. Soon, a subtropical ridge to the west of the storm weakened and the subtropical ridge to the east of the system pushed Talas to the west. As a result, Talas accelerated towards the west maintaining strength and outflow. An upper-level cyclone over the system suppressed the convection and kept it from reaching the center. Therefore, Talas remained weak and did not strengthen further. Convection never managed to consolidate the center and convective banding remained well away from the fully exposed low-level circulation center. The convective banding continued to expand more and more with the outer rainbands already brushing parts of Japan. Coastal areas in the nation have already reported gale-force winds several hours before landfall, while the Omega block continued to drive Talas towards the nation. Land interaction weakened Talas, prompting the JMA to downgrade Talas from a typhoon to a severe tropical storm with winds of under . Early on September 3, Talas made landfall over Aki, Japan. After landfall, Talas accelerated north at over and its central convection became significantly eroded and was displaced to the northeast as Talas was exposed to a very strong wind shear of over that made the LLCC very distorted and difficult to pin-point. Talas was embedded in a baroclinic zone and the JTWC anticipated an extratropical transition, which prompted them to issue their final warning on the system. On September 5, the JMA issued their final warning on the system, reporting that Talas has become extratropical on the Sea of Japan.
On September 1, a low pressure area formed to the northeast of Guam. On the next day, the JMA started monitoring the low pressure area as a tropical depression. Soon, the system developed a well-defined but partially exposed low-level circulation center (LLCC), prompting the JTWC to issue a tropical cyclone formation alert. On September 3, the central convection around the LLCC deepened with favorable equatoward outflow prompting the JTWC to initiate advisories on the system, designating it with "16W". Soon, 16W accelerated north at over with its LLCC being being consolidated by convection. Also, data from an ASCAT scatterometer pass revealed that the LLCC was tightly wrapped with winds prompting the JTWC to upgrade 16W to a tropical storm. An Aqua microwave imagery depicted that the LLCC remained partially exposed though consolidated with deep central convection. Albeit in an area of moderate vertical wind shear, an anticyclone enhanced northeastward outflow while a tropical upper tropospheric trough (TUTT cell) suppressed the outflow towards the west. As 16W continued to accelerate north at a staggering , convective banding became fragmented and detached behind the main area of central convection. However, the outflow to the southeast of the storm remained favorable and 16W continued to strengthen, prompting the JMA upgraded the system to a tropical storm, naming it "Noru".
Late on September 4, Noru's LLCC that remained partially exposed since formation unexpectedly became elongated and started weakening. However, data from an ASCAT scatterometer pass depicted that the LLCC had an expansive area of strong tropical storm force winds along the eastern and northern peripheries. A TUTT cell wrapped the east and northeastern sides of Noru suppressing its outflow. Soon, the convective banding, which was already fragmented started becoming disorganized causing Noru to start weakening. A new TUTT cell developed over the system and started restraining outflow. As a result, the LLCC became fully exposed and virtually lacked convection. The TUTT cell moved over Noru snuffing outflow in all directions and sheared the remnant central convection, prompting the JTWC to downgrade Noru to a tropical depression. However, data from an scatterometer pass depicted that Noru had winds of over near the center, prompting the JTWC to reupgrade the system to a tropical storm. On September 5, Noru started to appear like a hybrid system, primarily showing subtropical characteristics. The JTWC added that Noru was undergoing an extratropical transition and would become an extratropical cyclone within 24 hours. Noru continued to transition into an extratropical cyclone with a broadening LLCC and weaker winds at the core, being embedded in an upper-level trough that suppressed the formation of convection within the LLCC. With the extratropical transition well underway, Noru drifted into an area of low sea surface temperatures and started weakening, prompting the JTWC to downgrade Noru to a tropical depression. On September 6, Noru finished the extratropical transition becoming an extratropical cyclone east-southeast of Hokkaido, Japan, prompting the JMA and the JTWC to issue their final warning on the system.