Some East Tennessee counties are experiencing slick road conditions Monday morning after ice formed on secondary and untreated streets over the weekend.
Temperatures dipped into single digits early Sunday and are expected to remain below freezing until Monday afternoon.
The Tennessee Department of Transportation recommends anyone traveling to take extra caution on the roadways as black ice may not be visible to drivers right away.
Related: List of school closings and delays
More: Latest forecast
Map: Traffic conditions
"In the event that you do in fact have to be on the roadways give yourself some extra time to get where you have to go and perhaps the most important thing is give yourself some extra braking room," said Mark Nagi, with TDOT.
Here are the road conditions for several counties throughout East Tennessee as of 3:30 p.m. Sunday.
Anderson Co: Main roads mostly clear; secondary roads still experiencing very slick conditions
Blount Co: Main roads mostly clear; some slick spots on secondary roads
Campbell Co: Most roads are clear; some slick spots on secondary roads
Claiborne Co: Main roads mostly clear; some slick spots on secondary roads
Cocke Co: Patches of ice on main roads and secondary roads
Grainger: Main roads mostly clear; some slick spots on secondary roads
Greene: Main roads mostly clear; slick spots on secondary roads
Hamblen Co: Main roads mostly clear; icy conditions on secondary roads
Jefferson Co: Main roads are clear; some icy and slick spots on secondary roads
Knox Co: Main roads are clear; some slick spots on secondary roads
Loudon Co: Main roads mostly clear
McMinn Co: Main roads mostly clear; icy spots on secondary roads
Monroe Co: Main roads mostly clear; Tellico area near the river is experiencing very slick conditions
Morgan Co: Main roads are mostly clear; black ice in shaded areas; secondary roads in the northern part of the county are very slick
Roane Co: Main roads mostly clear
Scott Co: Main roads are clear; slick spots on secondary roads
Sevier Co: Wet and icy in the higher elevations; Main roads are mostly clear in Wears Valley and Waldens Creek areas but getting off the mountain is difficult because of slick conditions; Wiley Oakley area is slick and icy; Sky Harbor area in Pigeon Forge experiencing very slick and icy roads.
Union Co: Main roads are clear; slick spots on secondary roads