Drivers hitting the roads Friday morning should be wary of black ice, according to the National Weather Service.
With low temperatures — in the teens and 20s — across southern New England on Thursday night, the threat of black ice is for the whole region, Kim Buttrick, a spokeswoman for the National Weather Service in Boston/Taunton, said.
“Fog will form, and with the sub-freezing temperatures, there is that potential for black ice,’’ she said.
Winds will be turning out of the northeast overnight, which will draw down cooler air, according to Buttrick. There will also be a maritime air mass coming in from the water, so more moisture will be spreading across the region in the form of low clouds, fog, and maybe even a spotty drizzle.
The greatest risk for the icy roads will be between 4 and 10 a.m. Friday.