Snow is expected across north Georgia this afternoon and tonight, according to the National Weather Service's winter weather advisory, which goes into effect at 1 p.m. and replaces the previous winter storm watch.
A "cold polar air mass" is expected to spread into north Georgia as widespread rain shifts south. The result: Rain will mix with and change over to snow across portions of north Georgia, including Cobb County.
The heaviest snowfall would be in the northeast Georgia mountains.
The winter weather advisory, which lapses Friday morning at 7, warns of light snow and black ice north of a Carrollton-to-Atlanta-to-Jefferson line and south of a Rome-to-Hiawassee line.
Less than 1 inch of the white stuff is expected to accumulate on grassy and elevated surface and could create nuisance driving conditions. Black ice also may form Thursday night and Friday morning when temps dip below freezing.
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Snow is expected to affect northwest Georgia by early afternoon and spread east through the early evening hours. While winds will continue to gust up to 30 mph, temps across north Georgia are expected to drop to the lower 30s by midnight.
A winter weather advisory for snow means that periods of snow may cause primary travel difficulties. Use caution while driving, NWS says.