What is an "isobar" on a weather map?

An isobar on a weather map is defined as a line that connects points of equal atmospheric pressure. This is important in meteorology because atmospheric pressure plays a critical role in weather patterns and forecasting. Isobars help in visualizing and understanding high and low-pressure systems, which can indicate different weather conditions.

When isobars are close together, it generally indicates a steep pressure gradient, which is often associated with strong winds. Conversely, widely spaced isobars suggest a gentle pressure gradient and typically indicate lighter winds. Knowing how to interpret isobars allows meteorologists and others interested in weather to assess storm movement and intensity, making this concept crucial for accurate weather prediction.