The storm became slightly stronger as it moved over colder waters.

Laura slowly got tropical characteristics throughout the day as it moved over warmer waters.

Gradual weakening took place as the storm continued to move over open waters.

As the system moved over warmer waters, gale-force winds were measured.

However, as it moved over warmer waters, it began to gain strength.

Turning north of due west, Norbert then weakened as it moved over cooler waters.

Odile began to weaken as it moved over cooler waters on September 28.

After drifting for two days in the open ocean, it moved over cooler waters.

The weakening system was last noted later that day moving southward over open waters.

As the low moved over warmer waters, it was able to maintain an area of deep convection near its center.