In the figure below,the area known as tornado alley forms because polar air masses frequently collide with ________.
A) tropical air masses from the Gulf of Mexico
B) dry air masses from the desert southwest
C) moist Pacific air masses
D) dry air masses descending from the Rocky Mountains

Question

In the figure below,the area known as tornado alley forms because polar air masses frequently collide with ________. 
A) tropical air masses from the Gulf of Mexico 
B) dry air masses from the desert southwest 
C) moist Pacific air masses 
D) dry air masses descending from the Rocky Mountains

Quizplus · Accepted Answer

Tornado alley is a region in the central United States, including parts of Texas, Oklahoma, Kansas, Nebraska, and South Dakota, which experiences a high frequency of tornadoes. This area is formed when cold polar air masses from the north collide with warm, moist air masses from the Gulf of Mexico, creating strong atmospheric instability and favorable conditions for thunderstorms and tornadoes to form. The combination of these air masses is unique to the region, leading to the formation of tornado alley. Therefore, the correct choice is A, as tropical air masses from the Gulf of Mexico collide with polar air masses.

In the Figure Below,the Area Known as Tornado Alley Forms