Because the earth rotates in a clockwise direction, air which is drawn towards the centre of a high pressure system is deflected in an anti-clockwise direction in the Southern Hemisphere.
Kuba umhlaba ujikeleza ngokwe wotshi, umoya odontswa kumbindi wezixokelelwano ezinoxinzelelo oluphakamileyo luphambukisa ngokuchasene nendlela ehamba ngayo wotshi kwisiqingatha somhlaba sasezantsi.