Low pressure at the equator causes a Hadley cell to form.
Hadley cells bring warm trade winds
At the equator, trade winds from the Northern and Southern hemisphere meet, causing thunderstorms. Where these two winds meet is called the Inter-Tropical Convergence Zone (ITCZ).

Low pressure at the Tropics of Cancer and Capricorn cause Ferrel cells to form.
Ferrel cells bring warm southwesterly winds in the Northern hemisphere and northwesterly winds in the Southern hemisphere.
The Coriolis effect causes the cells to motion to the left in the Southern hemisphere and to the right in the Northern hemisphere.

The rotation of the Earth causes strong, high-altitude jet streams to form.
The tilt of the Earth causes the position of convection cells to shift seasonally.