Which of the following is NOT a factor that affects forecast accuracy?

• A. Cloud cover
• B. Forecast time range
• C. Size of forecast area
• D. Variable terrain

Answer: (A)

Forecast accuracy in fire weather predictions is mainly influenced by how far ahead you’re predicting, how large an area you’re forecasting, and how complex the terrain is. Each of these factors adds uncertainty: predicting weather farther in the future gives more opportunities for change, a larger forecast area contains more spatial variability, and variable terrain creates microclimates and localized wind/fire behavior differences that are harder to predict consistently. Cloud cover, while it’s a forecast element you report, doesn’t by itself determine the overall reliability of the forecast in this context. The predictability issues come from time horizon, area size, and terrain complexity, not specifically from whether clouds will be present.