The term 10 on the Beaufort Scale refers to a STORM, GALE, or IDEAL wind speed. A STORM is classified as having wind speeds of 64-72 knots, a GALE is classified as having wind speeds of 48-55 knots, and an IDEAL wind speed is classified as having wind speeds of 8-12 knots. The Beaufort Scale is a system used to measure wind speed and classify it into categories. It was developed by Admiral Francis Beaufort in 1805 and is still used today.