Knoxville

Severe Thunderstorm Risk and Sweltering Heat Strike Knoxville and Surrounding Areas

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Published on July 12, 2025
Severe Thunderstorm Risk and Sweltering Heat Strike Knoxville and Surrounding AreasSource: Google Street View

The National Weather Service in Morristown has issued a hazardous weather outlook for parts of southwest North Carolina, east Tennessee, and southwest Virginia for today and tonight. The weather forecast does not just predict sunshine and butterflies; it also includes a warning for potential strong to severe thunderstorms in the afternoon and evening. According to the NWS, these storms may feature wind gusts up to 60 mph and could lead to heavy downpours, raising the risk for isolated flash flooding in the region.

In the Knoxville area, today's forecast suggests a 40 percent chance of showers and thunderstorms, mainly after 2pm, under mostly sunny skies with a high near 91 degrees. It's not just the showers that locals should be prepared for, but also the heat index values are expected to hit as high as 98 degrees, making for a sizzling scenario. The light breeze might offer little reprieve, as calm winds are projected to become westerly at around 5 mph in the afternoon.

As night falls, the chances of precipitation drop slightly, but it's still on the radar for late sleepers and early risers. There's a 30 percent chance of thunderstorms before 9 pm, then a slight risk of storms again after 5 am. Despite the potential for weather-induced interruptions, temperatures should hold steady with a low around 71 degrees, and the winds will remain tame.

Looking ahead through the rest of the week, East Tennesseans can expect a series of partly cloudy days and nights, punctuated by frequent chances of rain and thunderstorms—especially in the afternoon and evening hours. The daytime heat endures, creeping upwards to near 94 degrees by Monday. Though the "probability for widespread hazardous weather is low," as noted by the NWS report, residents should remain vigilant of the skies, particularly when the sun is high and the clouds grow dark. The NWS also urges the public to report any instances of severe weather or flooding, emphasizing the importance of community-provided information.