The French league had different values at different times: 10 000, 12 000, 13 200 and 14 400 French feet, about 3.25 km to about 4.68 km. It was used for a while together with the metric system but it is not used now. The nautical league was three nautical miles.
Why does precipitation fall mainly on the windward side of a mountain? When humid winds blow from the oceans toward mountains they must rise up to pass over the mountains. The rising warm air cools when it rises and its water vapor condenses, forming clouds rain or snow falls on the windward side of the mountain. microclimate Climate within a small area that differs significantly from the climate of the surrounding area
Other mountain ranges such as the Rocky and Sangre de Christo Mountains have the west side as the windward and in some circumstances have the east side as the windward side. When the winds are from an easterly component, upslope slope occurs in the high plains.The best upslope conditions develop when there is a strong area of low pressure in the southern plains. To the north of the low, winds have a strong easterly component.he dewpoint and temperature convergence upon each other when the air is rising (temperature decreases faster with height than the dewpoint decreases with height in a rising parcel of air). Upslope flow is responsible for phenomena such as mountain summertime convection and upslope enhanced snow.