Black ice possible as temperatures plummet
Posted February 13, 2010
Updated February 14, 2010
Raleigh, N.C. — Warmer weather Saturday melted much of the snow, but cold temperatures overnight could create more problems Sunday morning.
There could be some freezing overnight, WRAL meteorologist Kim Deaner said, as temperatures dip into the lower 20s.
"We are expecting a very cold night, so black ice could be a problem overnight and Sunday morning," Deaner said. "Give yourself plenty of time to get where you are going on the roadways."
Black ice is the term for thin, clear ice that forms over black road surfaces as melting water flows across them and temperatures sink back below 32 degrees. It can be nearly impossible for drivers to see.
Due to the threat of black ice, the National Weather Service has put 31 counties east from Forsyth County to Currituck County under a winter weather advisory. The advisory runs until noon Sunday.
Black ice is most likely to develop on residential and less-frequently traveled roads or stretches that are shaded or hilly. By mid-morning, warmer temperatures will start to melt any ice.
The rest of Sunday will be partly cloudy and slightly warmer, with a high in the low 40s.
"There will be plenty of sunshine to melt what is left of the snow," Deaner said.
The next weather system will roll in Monday.
Deaner said that there will be a chance for periods of heavy to moderate rain Monday afternoon. However, no snow accumulation is expected, and temperatures will stay in the high 30s to the low 40s.
After the rain on Monday, the rest of the workweek looks clear with temperatures in the 40s.