ATPL: The conditions most favourable to the formation of mountain waves are
Domanda 319, Meteorology - ATPL - Airline Transport Pilot license
| Wind speed less than 15 kt and wind direction at right angles to mountains - intense radiation cooling at night particularly at the higher levels |
| Wind direction parallel to the general alignment of the mountain range - wind speed increasing with height - intense surface heating |
| Wind direction parallel to the mountain range - wind speed increasing with height - extensive isothermal layer between mountain crests and the tropopause |
| Wind direction approximately at right angles to the mountain range - wind speed 30 kt and steadily increasing with height - an inversion just above the crest level with less stable air above and below |
