NWCG: NWCG Fire Environment Poster

National Wildfire Coordinating Group (USFS/DOI) · 1 page

Sun, Heat, Wind Speed Humidity, and Rain and Wind Direction Clouds foretell The sun’s radiation heats fuels and lowers concerns about lightning and Cloud and Plume Indicators Poor air quality is a concern for firefighters Wind is the primary threat to safety on wildfires. Changes in windspeed and humidity. It creates a more unstable changing Smoke columns point out key and public. direction occur throughout the day based on the atmosphere. Bright, sunny days with above winds. the forces outlined

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