What type of weather front is drawn as semi-circles only and is known to move slowly?

The correct answer is the warm front, which is represented by semi-circles on weather maps. Warm fronts occur when warm air moves into an area occupied by cooler air, causing the warm air to rise gradually over the denser cool air. This process leads to the formation of clouds and precipitation ahead of the front. Because warm fronts have a more gradual slope compared to cold fronts and a slower rate of movement, they typically produce widespread and prolonged precipitation patterns.

The semi-circles on weather maps indicate the direction of the front's movement, which is generally from southwest to northeast in the Northern Hemisphere. This visual representation helps meteorologists quickly identify the presence of a warm front and anticipate the associated weather changes, such as shifts in temperature and atmospheric conditions.

Understanding the behavior of warm fronts is essential, as they can lead to long-duration rainfall and gradual temperature increases as the warm air replaces the cooler air. This is a distinct characteristic that differentiates warm fronts from other types of weather fronts, contributing to the accuracy of weather forecasting and analysis.