The Charlotte area was a frigid 24 degrees at 5 a.m. Tuesday, although the day will be sunny and the temperature will warm to a high of 48, the National Weather Service reported.
Tuesday night will remain mostly clear, with an expected low of 29 degrees.
Temperatures will continue to fluctuate throughout the week, with a high of 55 forecast for Wednesday, 49 on Thursday, 44 on Friday and then 55 again on Saturday. Skies will remain partly to mostly sunny all week.
In the N.C. mountains, temperatures in the teens and lower 20s and recent rain and snow have created widespread black ice conditions on roads, making travel hazardous, the National Weather Service reported.
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Dangerous conditions will remain until temperatures warm above freezing later Tuesday morning. Avery County Schools are closed Tuesday, while several other mountain school systems are on delays.