Above the friction layer, with a prevailing pressure gradient, the wind direction is...
Domanda 28, Meteorology - PPL(A) English - Private Pilot License (Aircraft)
| Perpendicular to the isohypses |
| At an angle of 30° to the isobars towards low pressure. |
| Parallel to the isobars. |
| Perpendicular to the isobars. |
