The storm is strengthening over the Atlantic, and could become a blizzard.

The next day, a ragged eye developed and the storm strengthened into a hurricane.

The storm made a broad turn to the north and slowly strengthened.

These conditions made it so the storm could not strengthen much.

By late on August 5, the storm strengthened into a hurricane.

The storm strengthened into a hurricane, though, late on September 11.

The storm quickly strengthened, becoming a hurricane only 12 hours later.

The storm continued generally northeast and strengthened into a hurricane.

By the time the coach arrived at the palace, the storm had strengthened.

The storm strengthened and by early on October 28, it became a hurricane.