How does Katabatic Wind form?

In winter conditions, a downsloping wind can develope in the early morning when a pool of cold, high elevation air begins to descen from the highlands due to the high density of the cold air. The landscape can channel and force the airflow to converge, causing it to strengthen. They are driven down slope by gravity, but the slopes are much more steep.

The winds can reach heights of 500 to 600 meters (1640 to 1970 feet) above the surface, although this height varies. These types of winds can reach velocities of up to 4 meters per second. The rush of cold air down the slopes rapidly decreases the surrounding air temperature as it speeds down the topography to the valleys and planes below it.

Katabatic winds are mostly synoptically triggered or they are activated by large scale weather features such as a high pressure system over the high elevations. More.

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