Special Weather Statement issued January 23 at 3:16PM EST by NWS Charleston SC

Temperatures tonight are forecast to dip below freezing shortly
after nightfall, falling into the upper teens to low 20s tonight.
As a result many roadways will remain hazardous for travel with
refreezing liquid, compact snow/ice, and black ice. This includes
primary roads, secondary roads, and back roads, plus bridges and
overpasses.

Black ice is difficult to see and distinguish from dry surfaces.
The deceptive nature of black ice can catch you unaware while you
are driving or walking, causing you to lose control of your motor
vehicle or to slip and fall.