Knoxville is starting Thursday near 70 degrees under partly cloudy skies, but the city is headed for a hot afternoon near 90. Showers and thunderstorms could arrive after 3 p.m., giving outdoor plans a narrow window before the weekend heat takes over.
Storms Arrive Late Thursday
Partly sunny skies and light southwest winds should carry temperatures into the upper 80s before scattered showers and thunderstorms become possible later in the afternoon. The rain chance is about 30%, and most locations could see less than a tenth of an inch, though a few storms may bring brief heavy rain or gusty winds.
Storm chances continue Thursday evening and into the first part of the night, with a 40% chance overall and a low near 69 degrees. The latest forecast from the National Weather Service lists no watches, warnings or advisories for the Knoxville area.
Friday Offers Another Storm Window
Friday will be mostly sunny with a high near 89, but another round of showers and thunderstorms may develop after 3 p.m. The rain chance is around 30%, with light north winds and a low near 67 Friday night.
A slight evening storm chance should fade quickly, leaving Friday night mostly clear. Saturday then looks like the weekend's cleanest outdoor day, with sunny skies, calm winds and a high near 90.
Heat Builds Into Next Week
Mostly sunny weather returns Sunday and Monday, with highs near 91 and 92 degrees, followed by about 93 on Tuesday. Wednesday could reach 94, with only a slight chance of an afternoon thunderstorm.
Forecasters expect heat-index values between 100 and 105 degrees across much of the Tennessee Valley through the end of the outlook. Hydration, shade and breaks from the afternoon heat will become increasingly important as Knoxville shifts from pop-up storms to a hotter, drier stretch.
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