Tropical Cyclone Koji (16S) Tracking Southwestward16.6S 81.5E
Tropical Cyclone Koji (16S), located approximately 930 nm south-southeast of Diego Garcia, has tracked southwestward at 10 knots over the past six hours.
Animated infrared satellite imagery shows no significant change in the overall structure of the system except for a slight cooling of the associated convective tops. Upper level analysis indicates the cyclone has just crossed into the poleward side of the ridge axis in an area of rapidly increasing northwesterly vertical wind shear (VWS).
TC 16S is beginning to round the western edge of the steering subtropical ridge to the east, weakened by a mid-latitude trough that is currently digging in from the southwest. The cyclone is expected to track in a more poleward trajectory after TAU 12, gradually weaken, and dissipate by TAU 72 due to the strong VWS. Maximum significant wave height is 26 feet.