The latest typhoon bulletin on the morning of May 31st from the Japan Meteorological Association said that Typhoon Jangmi is forecast to strengthen into a major typhoon when it makes landfall in southern Okinawa prefecture at 9 am on June 1st.
The storm, also known as Typhoon No. 6 in Japan, is expected to enter western Japan with the storm's affected area in this area until June 3rd and then is likely to move east of Japan.
The latest storm news from the Philippine Atmospheric, Geophysical and Astronomical Services Administration on the morning of May 31st said that Typhoon Jangmi (Philippines name Domeng) is moving north-northwest over the Philippine Sea.
On the morning of May 31, Typhoon Jangmi was estimated to be 670km east of Basco, Batanes. Maximum sustained winds of 120 km/h near the storm center, gusts up to 150 km/h, and central pressure 975 hPa.
The storm is moving north-northwest at a speed of 20 km/h. Storm-level winds spread to 560km from the storm center.
Philippine storm forecasters believe that heavy rain and strong winds may still occur in areas outside the forecast area. In addition, the path of Typhoon Jangmi may still change within the forecast area.
Forecasters pointed out that Typhoon Jangmi will continue to move north-northwest until June 1 before changing direction to south of Japan during the remaining forecast period. The typhoon is unlikely to make landfall in the Philippines and will leave the Philippine Area of Responsibility (PAR) in the afternoon of June 1.
Typhoon Jangmi is continuing to strengthen and will reach its maximum intensity on June 1 while still in the Philippine Sea. After that, the typhoon will gradually weaken but still maintain its typhoon intensity throughout the forecast period.