Capable of developing into hurricanes, for 10 points, identify these closed wind systems that circulate in the direction of the Earth's rotation and often feature a namesake "eye" at their center.
Vilhelm Bjerknes formulated an early theory of these systems, which became known as the Norwegian polar front model. These systems may form through interactions with local orography through a process called "lee troughing," in which a column of air descends down the lee side of a mountain. Low-level flow in baroclinic waves is dominated by the extra-tropical variety of these systems. The better-known tropical variety of these systems draw their energy from the release of the latent heat of water vapor condensation and feature a center with low humidity and low wind speeds, and all of these systems exhibit Coriolis circulation. Capable of developing into hurricanes, for 10 points, identify these closed wind systems that circulate in the direction of the Earth's rotation and often feature a namesake "eye" at their center.
Vilhelm Bjerknes formulated an early theory of these systems, which became known as the Norwegian polar front model.
cyclone [prompt on any specific cyclone such as hurricane or tornado]