on September 13, the JTWC and JMA estimated winds of . Although data from the JTWC suggested that this was Irma's highest intensity, the JMA increased the intensity of Irma to on September 15. Following Hal northward along a subtropical ridge, Irma slowly weakened, and later on September 15, the JTWC issued its last warning. A little over 24 hours later, the JMA ceased keeping an eye on Irma. Tropical Storm Jeff (Lusing) A TUTT developed south of a subtropical ridge, which triggered inflow that later resulted in the development in an area of disturbed weather at 00:00 UTC on September 11. Six hours later, the JMA classified the disturbance as a tropical depression, and on September 13, the agency upgraded the depression into a tropical storm. Dvorak estimates of T2.5/ prompted the JTWC to follow suit the following morning. However, further organization was slow to occur due to strong wind shear caused by Jeff's proximity to Typhoon Hal; all deep convection was restricted to the southern semicircle. On September 14, both the JTWC and JMA agree that Jeff reached its peak intensity of . Late on September 15, the JTWC dropped warnings on Jeff. Just over 24 hours later, the JMA stopped tracking it as well. Severe Tropical Storm Kit (Maring) An eastward extension of the monsoon trough resulted in an area of disturbed weather around east of Manila on September 18. A combination of increased convection, enhanced outflow aloft, and a Dvorak estimate of T2.0/ resulted in the JTWc upgraded the disturbance into a tropical depression; the JMA followed suit around this time. Even though the depression tracked westward over Luzon, the depression gradually intensified, and at 18:00 UTC on September 19, the JTWC upgraded Kit into a tropical storm. Eighteen hours later, the JMA did the same, making Kit the sixth out of eight tropical storm that month. Tracking over the open waters of the South China Sea, an expansion of the storm's southwesterly outflow channel promoted further intensification. On the morning of September 21, both the JTWC and JMA reported that Kit attained peak intensity of respectively. On September 22, the storm made landfall along the northeast of Hong Kong; at the time of landfall, the JMA estimated winds of . Several hours later, the JMA ceased following the cyclone. According to press reports, torrential rain occurred near Shantou, where Kit moved ashore. Eight people were