Why do most tornadoes in the United States form in May and June? A.
Warm air masses meet cold air masses during these months.

B.
The Coriolis effect is the strongest during these months.

C.
The temperatures are highest during these months.

During the months of May and June, tornado activity is as its peak in the southern Great Plains. The air mass then moves northward into the Northern Great Plains and the Great Lakes area, causing a tornado activity peak in these areas during the summer months.

Explanation:

The reason why tornadoes are more common in spring compared to other months is because the required atmospheric ingredients come together more often this time of year. Tornado outbreaks occur when a storm system propelled by a strong, southward dip in the jet stream punches into the Plains, Midwest or South.

the actual answers are a, b, and d.