Japanese weather officials say Tropical Storm Prapiroon will approach the southwestern region of Okinawa on Sunday night. They are warning of violent winds and high waves.
The Meteorological Agency says that as of noon on Sunday, Prapiroon was situated 280 kilometers south of Naha, Okinawa and was moving north northwest at 20 kilometers per hour.
The maximum wind speed recorded near the center of the storm is around 90 kilometers per hour.
Developed rainclouds will likely cover the Okinawa region and may bring 70 millimeters per hour of localized rain.
Localized heavy rain is also forecast for western Japan due to the inflow of warm and damp air from the storm.