Knoxville

Knoxville Shrouded in Dense Fog as NWS Warns of Low Visibility. Sweltering Heat on the Horizon

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Published on August 15, 2025
Knoxville Shrouded in Dense Fog as NWS Warns of Low Visibility. Sweltering Heat on the HorizonSource: Unsplash/ Mirza Babic

The National Weather Service in Knoxville reported heavy fog this morning, with visibility down to 0.15 miles. Humidity is at 100%, with temperatures around 72°F (22°C). The day ahead is expected to bring heat and a slight chance of rain.

This afternoon, there’s a 20 percent chance of showers and storms after 3 p.m. Temperatures will reach about 91°F, with the heat index pushing into the upper 90s.

The NWS says the hot weather will continue through the week, with highs in the low to mid-90s and lows in the low 70s. Light winds and little change in conditions mean Knoxville will stay hot and dry.

The NWS issued a special weather statement warning of dense fog in valleys and near rivers across northeast Tennessee and into southwest Virginia. Visibility may drop to a quarter mile or less, creating dangerous driving conditions. Drivers are advised to slow down, use low beams, and leave extra space between vehicles.

While the heat is set to continue, the NWS warning serves as a reminder to drive carefully in the fog. Sunshine will remain the region’s main weather pattern in the days ahead.