Which statement best describes squall lines' hazards?

• A. They bring light rain and mild winds.
• B. They bring intense rain, strong winds, lightning, and sometimes hail or tornadoes.
• C. They bring snow and freezing rain only.
• D. They bring calm conditions.

Answer: (B)

Squall lines are lines of thunderstorms that move rapidly and can bring multiple severe hazards at once. The statement describing intense rain, strong winds, lightning, and sometimes hail or tornadoes best captures what they can produce. Heavy, concentrated rainfall can lead to flash flooding and reduced visibility; strong winds can cause downed trees and damage; frequent lightning poses danger to people and structures; hail can damage vehicles and property; and in some setups, tornadoes may develop within or near the line. The other options underestimate or mischaracterize squall lines—light rain and mild winds aren’t typical of these systems, snow and freezing rain describe winter weather rather than a squall line, and calm conditions are the opposite of what these storms bring.