calm air - wind moving at less than 1 knot; 0 on the Beaufort scale

light air - wind moving 1-3 knots; 1 on the Beaufort scale

light breeze - wind moving 4-7 knots; 2 on the Beaufort scale

gentle breeze - wind moving 8-12 knots; 3 on the Beaufort scale

moderate breeze - wind moving 13-18 knots; 4 on the Beaufort scale

fresh breeze - wind moving 19-24 knots; 5 on the Beaufort scale

strong breeze - wind moving 25-31 knots; 6 on the Beaufort scale

moderate gale, near gale - wind moving 32-38 knots; 7 on the Beaufort scale

fresh gale - wind moving 39-46 knots; 8 on the Beaufort scale

strong gale - wind moving 47-54 knots; 9 on the Beaufort scale

whole gale - wind moving 55-63 knots; 10 on the Beaufort scale

storm, violent storm - a violent weather condition with winds 64-72 knots (11 on the Beaufort scale) and precipitation and thunder and lightening

hurricane - a severe tropical cyclone usually with heavy rains and winds moving a 73-136 knots (12 on the Beaufort scale)

graduated table, ordered series, scale, scale of measurement - an ordered reference standard; "judging on a scale of 1 to 10"