The heat remains the big weather story Thursday across the Cumberland Plateau and Tennessee Valley, with a Heat Advisory in effect. Sunshine will push the high to around 94 on the plateau, where the heat index could reach 99. The Tennessee Valley will be even hotter, with a high near 97 and a heat index around 103. Thursday night stays mostly clear and warm, with lows in the lower to middle 70s.

Friday brings another hot day, especially in the Tennessee Valley, where the high reaches around 97 with a heat index as high as 104. The Cumberland Plateau will be near 93, with a small chance for an afternoon shower or thunderstorm. A few storms are possible Saturday afternoon in both regions, with severe storms possible in the Tennessee Valley. Otherwise, sunshine remains plentiful, with highs around 91 on the plateau and 95 in the valley.

Temperatures finally begin backing off Sunday and Labor Day. Sunday stays sunny with highs in the upper 80s on the Cumberland Plateau and lower 90s in the Tennessee Valley. Labor Day brings a 30 percent chance for afternoon showers and thunderstorms in both regions, along with noticeably lower temperatures. Highs will reach the middle 80s on the plateau and upper 80s in the valley.

CLIMATE & ALMANAC

Normal High: 81°

Normal Low: 60°

Record High: 94° — 2011

Record Low: 47° — 2017

Record Rainfall: 2.00 inches — 1988

Sunrise: 6:13 AM

Sunset: 7:04 PM

Daylight: 12 hours, 51 minutes

Daylight is decreasing by about 2 minutes, 11 seconds each day.

SKY & SEASONS

Moon: Waning Gibbous, about 60% illuminated.

Next Full Moon: Saturday, September 26 at 11:49 AM

Next New Moon: Thursday, September 10 at 10:27 PM.

Next Season Change: Fall begins Tuesday, September 22 at 7:05 PM.

Daylight Saving Time: Ends Sunday, November 1. Clocks fall back one hour at 2:00 AM.

Forecast information provided by the National Weather Service. Climate information is based on National Weather Service and NOAA records. Astronomical information is based on established astronomical calculations.