Which of the following is NOT an indicator of wild-land fire behavior?

Smoke color is not considered a direct indicator of wildland fire behavior, primarily because it does not provide specific information about the fire's intensity, rate of spread, or potential for growth. While smoke can indicate combustion efficiency and type of fuel burning, it does not correlate directly with fire behavior metrics such as flame length, flaring, or sudden increases in fire activity, referred to as blowups.

Flame length is crucial for understanding the heat output and potential for the fire to spread, while flaring can indicate active fire growth and changes in wind conditions. Blowups represent rapid intensification of a fire, demanding immediate attention from fire management personnel. Thus, smoke color, while valuable for assessing smoke dispersion and air quality, does not effectively predict the behavior of the fire itself in the way the other indicators do.