The fog was so thick that it covered the entire mountain.
How does fog form?
Condensation of water vapor in the air results in fog formation. Condensation begins at a relative humidity of less than 100%, and then fog occurs. Condensation accelerates with further increase in moisture. There is an increase in the already existing droplets and then the fog turns into fog. The relative humidity in the air during fog is between 80 and 100 percent. Even when temperatures are below freezing, the mist still consists of tiny droplets of well-chilled water in the air at the ground crust. Only at temperatures of −30 ° C do fogs contain a certain amount of ice crystals.