A Red-Flag Warning has been issued for Jasper County and the surrounding area. The NWS doesn't often send out this type of notice the evening before, so it looks like their confidence level is pretty high.
Definition: A Red Flag Warning also known as a Fire Weather Warning is a forecast warning issued by the United States National Weather Service to inform area firefighting and land management agencies that conditions are ideal for wildland fire combustion, and rapid spread. After drought conditions, when humidity is very low, and especially when high or erratic winds which may include lightning are a factor, the Red Flag Warning becomes a critical statement for firefighting agencies. These agencies often alter their staffing and equipment resources dramatically to accommodate the forecast risk. To the public, a Red Flag Warning means high fire danger with increased probability of a quickly spreading vegetation fire in the area within 24 hours.