In the United States, winter thunderstorms often occur ____ when cold air aloft moves over the region.
a. in Hawaii
b. in the northeast
c. along the east coast
d. along the west coast
e. in the Gulf Coast region
Question 2
Ordinary cell thunderstorms most frequently form
a. in the morning.
b. at noon.at noon.
c. in the afternoon.
d. in the evening.
e. at night.