Which symbol on a chart represents a warm front?

The symbol representing a warm front on a chart is depicted as a red line with half circles on one side. This design indicates that warm air is moving into an area, lifting over the cooler air mass that it meets. The half circles are oriented in the direction that the warm front is progressing, visually demonstrating the transition from cooler to warmer air.

Understanding the symbols used in meteorological charts is crucial for navigation and weather forecasting, as recognizing warm fronts helps in predicting weather changes, such as the potential for rain or temperature shifts associated with the front's passage.