Namtheun is located 228 km southwest of Minami Tori Shima, and has moved north-northeastward at 19 km/h (10 knots) over the past 6 hours. Namtheun is expected to track north-northeastward to northeastward through the forecast period under the steering influence of the subtropical ridge to the southeast.  Slight intensification is anticipated in 12 hours then a steady weakening trend through the remainder of the forecast as conditions gradually degrade.  Forecast guidance is in fair agreement with a 204 km spread in solutions at 2 days. The track guidance has come into better agreement over the past 12 hours lending medium confidence to the JTWC forecast track. Maximum significant wave height is 4.9 meters (16 feet).