Winter Weather in Calhoun, South Carolina

A band of snow and sleet moved through the county on the morning of the 10th. A COOP observer located northeast of Swansea reported a half inch of snow and sleet. As temperatures warmed aloft, snow and sleet transitioned to freezing rain by late morning into early afternoon. A COOP observer in St. Matthews measured 0.15 of average radial ice accumulation on branches.

A broad mid-level trough pushed across the eastern CONUS throughout January 10th. The associated surface low pressure and warm advection caused a brief band of heavy snow, sleet, and freezing rain to develop in the Central Savannah River Area and southern Midlands. As temperatures warmed aloft and cold air damming conditions strengthened at the surface, the freezing rain shifted northwards with portions of the central and northern Midlands receiving up to 0.25 ice overnight into January 11th.