Typhoon Jebi, was generated over the sea near Minamitorishima at 9 on August 28, 2018, and traveled westward, then northwest over the southern seas of Japan with rapidly developing, and made landfall in the southern part of Tokushima prefecture at around 1200JST on September 4 at 950 hPa. Then, it made landfall again near Kobe City, Hyogo Prefecture around 1400JST September 4, causing record-breaking strong wind in Shikoku and the Kinki region. The very strong winds found around the landed typhoons are affected by the atmospheric environment, surface conditions, and the formation and disappearance of internal mesoscale structures. The strong winds associated with the landed typhoons have been reported in relation with topography, but it is not clear how the specific strong winds occurred and their internal structure. Therefore, the purpose of this study was to clarify the structure of the inner core of a typhoon that caused a severe gust.

From the data of the Japan Meteorological Agency, it was found that a very strong wind was present for short time around 1400 JST on September 4 near Kobe Airport in Kobe City, Hyogo Prefecture. The phased array weather radar and X-band polarimetric radars observes Jebi around that time. As a result of analysis of radar observation, it was found that he vortex of the eyes inside Chevy was tilted, and that Kobe Airport was located near the wall cloud of the eyes of the typhoon.

Therefore, it was speculated that almost at the same time as Jebi landed in Kobe, the passage of cloud walls in the eyes and the effects of surface friction caused short-term gusts at Kobe Airport and Kobe.