In terms of wind speed, what is typical for downslope winds?

Downslope winds, often referred to as katabatic winds, typically exhibit speeds in the range of 5-10 mph. These winds are formed when cold, dense air flows down from elevated terrain such as mountains or hills. As the air descends, it accelerates due to gravity, but the terrain and thermal effects often moderate these speeds, keeping them within the 5-10 mph range.

Understanding downslope wind behavior is critical in wildland fire management because these winds can significantly influence fire behavior, including spread and intensity. When winds are in this moderate range, they can help transport embers and effectively change the location and spread of the fire. Recognizing the typical wind speeds helps fire personnel anticipate fire behavior in various terrains and conditions, which is essential for making informed operational decisions.