National Weather Service United States Department of Commerce
On Monday, August 21st, 2017, all of of North America experienced a solar eclipse of the sun.  The path of the total solar eclipse was from the Plateau to much of southeast Tennessee to southwest North Carolina.  The maximum solar eclipse occurred between 233 and 236 pm ET.  Due to the moon’s blockage of the suns solar radiation, temperatures (red line) dropped as much as 10 degrees between 2 and 3 pm Monday afternoon.  However, the temperature drop varied greatly across east Tennessee, southwest Virginia, and southwest North Carolina.  
The dewpoint temperature (green line), which is measure of moisture in the air, generally increased during the eclipse.  The graphs below show the different temperature and dewpoint observation traces across southwest Virginia, east Tennessee, and southwest North Carolina.


Eclipse Observed Temperature Curves on Monday, August 21st 2017
Athens, TN Temperature Graph
Cleveland, TN Temperature Graph
Andrews, NC Temperature Graph
Chattanooga, TN Temperature Graph
Pigeon Forge, TN Temperature Graph
Knoxville, TN Temperature Graph
Morristown, TN Temperature Graph
Oak Ridge, TN Temperature Graph
Jacksboro, TN Temperature Graph
Tri-Cities, TN Temperature Graph
Abingdon, VA Temperature Graph
Wise, VA Temperature Graph