n. The direction of the wind vector.
In fire behavior modeling, wind direction is the direction the wind is pushing the fire and is indicated by the direction the smoke plume is traveling. Wind direction can be specified with respect to true north or with respect to the upslope direction. In weather applications, wind direction is the direction the wind is coming from (that is, opposite the direction the wind vector). For example, a south wind blows from south to north, so the wind direction for fire modeling is north.