How do air masses move at a warm front ?

Question

Question ATPL - Airline Transport Pilot license - Meteorology

QuizVDS · Accepted Answer

Warm air overrides a cold air mass

QuizVDS · Answer

Cold air overrides a warm air mass

QuizVDS · Answer

Warm air undercuts a cold air mass

QuizVDS · Answer

Cold air undercuts a warm air mass

Id 532 - ATPL - How do air masses move at a warm front ?