As a cold front moves into a warm air mass
A)there is a substantial horizontal pressure gradient at heights of a kilometer or more above the surface of the two air masses.
B)the cold front has a smaller vertical pressure gradient than does the warm air.
C)the cold front slopes backward at a ratio of between 1:5 and 1:20.
D)the warm air subsides and is overrun by the cold front.

Question

Quizplus · Accepted Answer

When a cold front moves into a warm air mass, there is a substantial horizontal pressure gradient at heights of a kilometer or more above the surface of the two air masses. This is because the cold air is denser and creates a steep pressure gradient that can result in strong winds.

As a Cold Front Moves into a Warm Air Mass