Fire Weather Prediction Tool (IMAGE) USDA Forest Service - Northern Research Station Caption The USDA Forest Service collaborated with St. Cloud State University to develop the Hot-Dry-Windy Index (HDW), a new fire-weather prediction tool based on the key atmospheric variables that affect wildland fire: temperature, moisture, and wind. To test the new tool, scientists compared its predictions with fire behavior recorded during four recent wildfires, including the Pagami Creek Fire on the Superior National Forest in Minnesota. Credit Superior National Forest Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.