The central United States is a very good air mass source region.

Question

Quizplus · Accepted Answer

The central United States is not considered a very good air mass source region because it does not have the uniform characteristics typically associated with good source regions, such as vast, flat areas with consistent temperature and moisture levels. Good air mass source regions are usually large, flat areas with uniform surface characteristics, like the Arctic tundra, tropical oceans, or large deserts.

The Central United States Is a Very Good Air Mass