Initially, the system tracked southwestward before turning northwestward along the edge of a ridge.

The storm degenerated into a non-convective low late on July 3 as it turned northwestward.

Around that time, Calvin turned northwestward in response to an mid-tropospheric trough.

Later that day, the storm turned northwestward and later curved westward.

The typhoon subsequently weakened and turned northwestward as it approached the Philippines.

Two days later, the system attained tropical storm intensity and turned northwestward towards Cuba.

By September 9, a new ridge developed east of Linda, causing the storm to turn northwestward.

It passed about 175 miles to the south of the island before turning northwestward.

Between September 26 and 27, the storm continued to slow while turning northwestward.

By this time, the storm began turning northwestward in response to a subtropical ridge south of Japan.