Typhoon Kompasu was noticed on August 28, the United States Air Force base in Okinawa, Japan, began preparing for what was then Tropical Storm 08W. Tropical Cyclone Condition of Readiness (TCCOR) level three was issued the following morning. By August 30, forecasts showed that a strengthening storm would strike the area, possibly bringing winds in excess of . Following this, the TCCOR level was increased to two. For the first time in over three years, TCCOR level one was declared on August 31. Military personnel and residents across the island were urged to complete their preparations and remain indoors for the duration of the typhoon. During the storm's passage on August 31, the highest warning level, TCCOR One-E (emergency) was declared. Following Kompasu's passage, the emergency warning was changed to recovery as conditions improved.