What do isobars represent on a weather chart?

Isobars are lines on a weather chart that connect points of equal atmospheric pressure. These lines are crucial for understanding weather patterns, as they indicate areas of high and low pressure in the atmosphere. High-pressure areas are typically associated with clear skies and calm weather, while low-pressure areas can lead to stormy conditions and precipitation. By analyzing the spacing between isobars, pilots can gauge wind speed; closely spaced isobars indicate stronger winds, while wider spacing suggests lighter winds. This understanding of isobars is fundamental in meteorology and essential for flight planning and safety.