sidvind

Sidvind is a term used in Swedish (and related Scandinavian languages) to describe wind that comes from the side relative to a moving observer or object. In English, the closest general term is crosswind. The concept is used across meteorology, aviation, and nautical contexts to characterize winds that are perpendicular or nearly perpendicular to the direction of travel.

In aviation, sidvind can complicate takeoffs and landings because it can push an aircraft sideways during approach or liftoff. Pilots counter crosswinds with appropriate control inputs and techniques, such as using a sideslip or aligning the aircraft with the wind (crab approach) and then correcting before touchdown, if conditions allow. The crosswind component is a key factor in determining safe operating procedures and runway requirements.

In sailing and boating, sidvind refers to wind from the side, affecting stability and progress especially when sailing close to the wind or on tighter courses. Sailors adjust sail trim and course, often employing tacking or jibing to maintain the desired direction relative to the wind.

In ground transportation and motorsports, strong sidwinds can influence handling and stability, particularly for high-sided vehicles, caravans, or open-bodied race cars. Wind gusts from the side can cause sudden drift, requiring compensatory steering and speed adjustments.

Measurement and forecasting of sidwind focus on the crosswind component—the portion of wind perpendicular to the travel direction. Weather reports typically present wind direction and speed, with crosswind considerations derived from the angle between wind and planned path. Sidvind derives from sid (side) and vind (wind).