National Weather Service observations showed that even St. Simons Island off Georgia's coast was below freezing early Wednesday, with a temperature of 30 degrees.
High winds made it feel much colder, with wind chills as low as zero degrees in the northwest Georgia town of Calhoun before dawn Wednesday.
A U.S. Forest Service weather station on Brasstown Bald, Georgia's highest peak, recorded one of the state's coldest temperatures -- 7 degrees -- around 6 a.m.
The weather service was forecasting what could be the coldest temperatures of the week early Friday morning. Lows then are expected to be 15 in Atlanta; 13 in Rome; and 9 in Blairsville.
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