Wind speed refers to how fast air is moving in the atmosphere, typically measured in miles per hour (mph) or kilometers per hour (km/h). It is an important factor in weather forecasting and can influence various activities, such as sailing, flying, and outdoor sports. Wind speed is often measured using an instrument called an anemometer. Wind speed can vary significantly depending on location and weather conditions. For example, during a storm, wind speeds can increase dramatically, leading to potential hazards like flying debris. Understanding wind speed helps meteorologists predict weather patterns and informs people about safe conditions for outdoor activities.