An isobar is a line on a weather map that connects points of equal atmospheric pressure. Meteorologists use isobars to visualize pressure patterns in the atmosphere, which helps in predicting weather changes. When isobars are close together, it indicates strong winds, while widely spaced isobars suggest lighter winds. Isobars are often found on maps that display weather systems, such as high-pressure systems and low-pressure systems. Understanding isobars is essential for interpreting weather forecasts and understanding how different weather phenomena, like storms, develop and move across regions.