 A short lived system , this cyclone followed in the wake of Ken . In fact , Ken 's outflow kept the thunderstorm activity significantly removed from the depression 's low level center for its entire existence . Moving northwest , numerous ship reports of 30 knots ( 56 km / h ) winds led to the indication of this depression during the afternoon of September 21 . The cyclone could not develop into a deep system due to the persistent wind shear as it began to round the western periphery of the subtropical ridge . By the afternoon of September 22 , the cyclone weakened into a low pressure area . This low developed into a small extratropical cyclone when it linked up with a frontal boundary southeast of Japan on September 24 . 
