HIDE Special Weather Statement issued February 21 at 12:01AM EST by NWS Greenville-Spartanburg
...PATCHY BLACK ICE EXPECTED BY EARLY FRIDAY MORNING...
Temperatures are expected to fall below freezing late tonight
across the mountains. Any water running off or left standing from
the rain and light snow we received late Thursday will freeze on
untreated road surfaces during the pre-dawn hours on Friday.
Patchy black ice can be expected, especially on secondary roads
and residential streets, during the morning commute on Friday.
Temperatures are expected to climb back above freezing around noon
or 1 pm in the mountain valleys, but will probably stay below
freezing all day above 3500 feet.