The storm accelerated north-northwestward after becoming embedded within fast air currents, which was as Floyd moved between a strong trough and a subtropical high pressure area.

A trough merged with the low-pressure area creating an even stronger trough over the eastern Gulf of Mexico.

A strong trough of low pressure turned the hurricane northeastward, and Carol later intensified into a major hurricane.

A strong trough ahead of Greta prevented significant strengthening as it moved westward across the Caribbean Sea.

The storm did not get stronger because of a very strong wind shear from a strong tropical upper tropospheric trough.

Later that day, the storm began to accelerate as it traveled northeast ahead of a strong trough located to the northwest of Luis.

As the high pressure system to its north weakened, a strong mid-latitude trough approached the area from the northwest.

Fausto slowly turned northwest into an area between two strong troughs.

On August 26, a strong frontal trough weakened the high pressure system to the storm's north, causing a turn to the north during the next few days.

It reached hurricane strength, then turned to the northeast and on November 6, as it was picked up by a strong trough.