Question 1270Navigation General

The correct answer is D) warm front. When a warm air mass overtakes a cold air mass, the contact surface between the two air masses is called a warm front. This is because the warm air mass is advancing and pushing the cold air mass out of the way, with the warm air mass rising up and over the colder air below. The other options are incorrect because: A) A cold front occurs when a cold air mass overtakes a warm air mass. B) A water spout is a tornado that forms over water. C) A line squall is a narrow band of severe thunderstorms.