Tracking changes in wind speed, humidity and temperature is crucial for predicting fire behavior and keeping firefighters safe. The new Kestrel Fire Line now includes models with built-in Probability of Ignition (PIG) and Fine Dead Fuel Moisture (FDFM) measurements along with every key fire-related environmental measurement. A Kestrel DROP D3FW is the perfect tool to track conditions and trends on a burn site or wildfire. Just leave it in place to log temperature and humidity round-the-clock to plan the best time to put fire on the ground or understand the round-the-clock weather patterns on a fire.