Rib - A strong ridge on the surface of the shell.

A strong ridge of high pressure to the system's north forced Charley to change track quickly to the west-northwest.

There is a strong ridge running between the pectoral and pelvic fins on each side of the body.

With a strong ridge to the north, the depression tracked steadily westward.

Further organization occurred as the depression moved around the southern periphery of a strong subtropical ridge.

The trough broke down and was replaced by a strong ridge.

It moved quickly to the west-northwest due to a strong ridge to its north.

A strong ridge situated north of the depression steered the system steadily westward.

A strong ridge of high pressure continued to push the system west, towards the Caribbean Sea.

The system was forced west due to a strong ridge in the eastern Atlantic.