# Forces MET

Geostrophic wind flows along straight isobars. As it is flowing in a straight line, the forces must be balanced. There are only two forces here (as you are above the friction layer): pressure gradient force and Coriolis.

Gradient wind flows along curved isobars. As it is flowing in a circle (or a curve) this is not a straight line and so the forces on it cannot be balanced!

Surface wind flows slightly across isobars towards the low. As it is flowing in a straight line, the forces must be balanced. As it is within the friction later, there are three forces here, pressure gradient force, friction and Coriolis.

Which forces are balanced in the case of geostrophic wind?
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