What characterizes a warm front?

A warm front is characterized by the movement of warm air that rises over cooler air masses. This process often leads to the creation of clouds and precipitation, as the warm, moist air cools and condenses. Typically, before the arrival of a warm front, you will find warm air that contains high humidity, which can lead to thunderstorms and rain. This phenomenon occurs because warm air is less dense than cold air, allowing it to rise gradually.

The presence of high humidity is significant as it contributes to the likelihood of cloud formation and precipitation. Thunderstorms can develop ahead of the warm front due to the lifting of warm air over the cooler, denser air, creating unstable atmospheric conditions. Hence, the description of warm air with high humidity and the potential for thunderstorms accurately captures this characteristic of a warm front.