• To get anything to accelerate we need a net unbalanced force in one direction


PGF= Change in Pressure
                Distance

Force - drives the winds
    Higher Potential energy (PE)  to Lower Potential Energy (PE)

PGF - if this was the only force - then air would move at right angles to the isobars in a straight line.

Greater the differences in the pressure the greater the windspeed
=> Isobars that are closer togther - stronger windspeed

Magnitude of the force - directly related to the gradient