You find low pressure at the bottom center of a hurricane.  Surface winds will blow counterclockwise in the northern hemisphere and clockwise in the southern hemisphere.  Hurricanes form in the subtropics.  The trade winds blow from the east in both hemispheres at those latitudes.


A force pointed in the direction of an object's motion will cause a moving object to speed up.  If the force is pointed opposite the object's motion (such as friction would do) the object will slow down.

The pressure gradient force (PGF) is perpendicular to the contours and points toward low.  This is true in both the northern and southern hemispheres.


The PGF will start stationary air moving.  Thus the direction of the intial motion and the PGF will both point in the same direction.  The PGF is perpendicular to the contours and points toward low pressure.

In #10, the direction of the initial motion is always toward low pressure (in the same direction as the PGF).

Remember you must look in the direction the wind is blowing (look downstream) and then point to the left or right when drawing the direction of the Coriolis force.