* WHAT...Significant icing, with additional impacts from accumulating sleet expected. Total sleet accumulations up to two inches and ice accumulations between four tenths and three quarters of an inch. * WHERE...Upstate South Carolina and the southern foothills and Piedmont of North Carolina, including Charlotte. * WHEN...From 1 PM Saturday to 1 PM EST Monday. * IMPACTS...Ice and snow covered roadways will become treacherous and impassable. Widespread power outages are likely due to the weight of the ice and snow on tree limbs and power lines. The outages could last for days in some areas. The hazardous conditions could impact the Monday morning commute. * ADDITIONAL DETAILS...Ice accumulation will develop Saturday afternoon and evening but will increase more rapidly on Sunday, tapering off early Monday morning.