* WHAT...Significant icing expected. Total sleet accumulations up to one inch and ice accumulations between one tenth and one quarter inch in the valleys, and between one half and one inch in the higher elevations. Winds gusting as high as 45 mph. * WHERE...A portion of the mountains of western North Carolina near the Tennessee border, including northern Jackson County. * WHEN...Until 1 PM EST Monday. * IMPACTS...Widespread power outages are likely due to the weight of the ice and snow on tree limbs and power lines. Trees and large limbs could fall on structures, posing threat to life and property. The outages could last for days in some areas. Ice and snow covered roadways will become treacherous and impassable. The hazardous conditions could impact the Monday morning commute. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Ice and sleet accumulations will likely increase rapidly overnight. A transition to rain is expected in the valleys of the Tennessee border counties as early as Sunday morning. The rain may change to light snow Sunday night and early Monday morning, while very cold temperatures could result in roads refreezing Sunday night.