| In meteorology, a warm front is an area where warm air is displacing cold air. Since warm air is less dense than cold air, it pushes above the cold air as it moves forward. This motion is a bit less severe than in cold fronts, but more widespread in area. Therefore, warm fronts generally consist of a long duration of fairly light precipitation. Sometimes, if cold air is trapped in low areas, warm fronts can create freezing rain. Warm fronts are marked by a slow, steady increase of clouds, which lower as the front approaches
Warm fronts are depicted on weather maps as a red line with half-circles on the forward-moving side of the front. After a warm front passes, you can expect the weather to become warmer. However, cold fronts tend to follow behind warm fronts. If the cold front catches up with the warm front, it may create an occluded front. | 
