What are the two weather conditions that most influence wildland fires?

The two weather conditions that most influence wildland fires are moisture and wind. Moisture content in the environment, particularly in vegetation, plays a critical role in determining how easily a fire can ignite and how intensely it will burn. Low moisture levels typically lead to drier fuels, which are more susceptible to ignition and combustion.

Wind is another crucial factor affecting wildland fires. It can carry embers and flames, sometimes resulting in rapid fire spread to new areas. Wind can also influence the direction in which a fire burns, often intensifying its impact by supplying fresh oxygen, which enhances combustion. Together, moisture and wind significantly impact fire behavior and the management of wildland fires, making them the most influential weather conditions.

In contrast, while temperature and barometric pressure can have effects on weather patterns, they are not as direct in influencing fire behavior as moisture levels and wind speed.