Final answer:
As the cyclone center approaches Detroit, the air pressure at the city falls, indicative of the low-pressure system of a cyclone which leads to its associated severe weather patterns.
Step-by-step explanation:
As the cyclone center approaches Detroit on either storm track, the air pressure at the city falls.
When a cyclone approaches, it brings with it a system of low pressure. As the low-pressure center nears, the air pressure in nearby areas begins to drop. This change in air pressure is due to the cyclonic system drawing in warm air from the surroundings, causing it to rise and resulting in a decrease in air pressure at the surface. This reduction in pressure is key to the development of the cyclone's destructive weather patterns, including heavy rainfall and high winds. In fact, changes in air pressure are one of the primary ways meteorologists predict and track the progress of such storm systems.