The National Weather Service has issued an ice storm warning for Dickson and surrounding counties effective until midnight Friday. The statement issued at 1:30 pm says accumulation of one-quarter to half an inch of ice is possible as rain begins to change over to sleet and ice as night falls. Travelers are warned that ice is especially likely to form on elevated surfaces such as bridges and overpasses. A warning means hazardous conditions are expected or already occurring. Early Friday afternoon there were already reports of ice forming on trees and shrubs in the north end of the county, but roads remained only wet. As temperatures begin to fall, there is the potential for dangerous travel conditions and power outages caused by an accumulation of ice on limbs and power lines. Saturday’s forecast is for a high below or at freezing while more rain and sleet is predicted for Sunday.