Which of the following is NOT a key step in developing a basic fire behavior forecast during suppression?

• A. Gather weather, fuels, and topography data
• B. Observe current fire behavior
• C. Update models and communicate plans
• D. Ignore atmospheric stability and wind trends

Answer: (D)

When creating a basic fire behavior forecast during suppression, you start with the essential inputs that shape how a fire will move: weather, fuels, and topography. Gathering up-to-date weather data—temperature, humidity, wind speed and direction, and atmospheric stability—lets you estimate how easily flames will spread and how the fire’s behavior may change with the day’s conditions. Assessing fuels—types, moisture levels, loading, and continuity—tells you how readily the fuel will ignite and burn, which controls flame length and rate of spread. Topography, such as slope and terrain features, influences airflow and the speed and direction of spread, with steeper slopes typically driving faster uphill fire movement.

Observing current fire behavior is crucial because real-time observations confirm or challenge your forecasts, showing where spread is accelerating or slowing, where flame fronts are, and where spotting may occur. You then update models with new data and communicate plans to suppression crews and incident leadership, ensuring decisions stay aligned with evolving conditions and safety considerations.

Ignoring atmospheric stability and wind trends would undermine the forecast, since stability and winds are key factors that drive how quickly and where the fire will move.