This is the wind that gave its name to the hairdryer: the Föhn wind.
It is a unique atmospheric phenomenon that forms when cold air coming from the north encounters the natural barrier of the Alps.
Forced to rise along the mountain slopes, the air gains altitude and cools down, causing water vapor to condense and form clouds and precipitation on the northern side.
Once the air crosses the mountain ridge, however, conditions change dramatically.
Having lost much of its moisture, the air meets strong pressure differences that push it rapidly downward toward the valleys.
During this sudden descent, friction and compression against the rocky terrain cause the air to warm up quickly.
The result is a warm, dry, and often very strong wind, capable of rapidly increasing temperatures and drying the environment.
Because of these characteristics, the Föhn wind inspired the name of the hairdryer, a perfect symbol of this fascinating natural phenomenon.