Final answer:
Arrows in weather patterns usually indicate the movement of air from high to low pressure areas, influenced by the Coriolis force, which causes hurricanes in the Northern Hemisphere to rotate counterclockwise and tropical cyclones in the Southern Hemisphere to rotate clockwise.
Step-by-step explanation:
The arrows depicted in weather patterns usually represent the direction of air flow. In the context of the descriptions provided, the arrows likely indicate that air moves from regions of high pressure to regions of low pressure, which is a fundamental principle in meteorology. This movement of air is significantly influenced by the Coriolis force, which is due to the Earth's rotation and affects the direction of wind flow across the planet. In the Northern Hemisphere, this deflection is to the right, causing storms such as hurricanes to rotate counterclockwise. Conversely, in the Southern Hemisphere, the deflection is to the left, leading to a clockwise rotation in storms, like tropical cyclones. Air moving towards a low pressure centre rises, cools, and forms clouds, making these systems visible from space, while high pressure zones are associated with clear skies due to sinking air.