Tennessee Alabama Border
Friday, August 21, 2026 · 10:29 PM
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Low thunderstorm chances Saturday, primarily across the Plateau and southern Middle Tennessee. Overall drier with slightly below-normal temperatures this weekend with patchy fog Saturday and Sunday mornings. Low to medium rain and storm chances next week with seasonal temperatures. Clear night sky and the winds go dead Ten to twenty percent chance overhead West of the ridge where the moist air creeps While the rest of Middle Tennessee sleeps Fog in the valley, fog on the hill Overnight quiet, heavy and still Upper level troffing in the eastern sky Weak front pushing as the day gets high Upper eighties rising up to ninety-two Here comes the spark breaking through Light up the Ridge with an isolated blast Drier air coming but it won't last Storms on the Plateau firing through the heat Tennessee Alabama border Sunday morning behind the frontal line Mid-to-upper eighties feeling real fine Light air blowing from the northern side Grab a cold drink, let the weekend ride Patchy morning mist fading out fast Cooler temperatures settling at last Light up the Ridge with an isolated blast Drier air coming but it won't last Storms on the Plateau firing through the heat Tennessee Alabama border Yeah, down on the border Plateau thunder Slightly below normal, Sunday feeling right Tennessee Alabama border
The forecast discussion
NEW SHORT TERM, LONG TERM
KEY MESSAGES
Updated at 1020 PM CDT Fri Aug 21 2026
- Low thunderstorm chances Saturday, primarily across the Plateau and southern Middle TN.
- Overall drier with slightly below-normal temperatures this weekend with patchy fog Saturday and Sunday mornings.
- Low to medium rain and storm chances next week with seasonal temperatures.
SHORT TERM
(Tonight through Sunday Night) Issued at 1020 PM CDT Fri Aug 21 2026
Quiet conditions are expected to prevail tonight with the only concern being fog.
Mostly clear skies and light winds will be supportive for fog overnight.
Highest confidence in fog is across the Plateau, and short-term models support this as well with only low probability of 10-20% for fog west of the Plateau.
Upper-level troughing remains in place over the eastern CONUS Saturday, and a weak front will allow for isolated thunderstorms to develop during the afternoon, mainly for areas near the TN/AL border and across the Plateau.
Otherwise, it'll be a fairly nice Saturday with most of the area staying dry and seasonable temperatures in the upper-80s to low-90s.
Upper-level troughing continues into Sunday and behind the front, Sunday promises to be a very nice day with dry conditions and slightly cooler temperatures in the mid to upper-80s.
LONG TERM
(Monday through next Saturday) Issued at 1020 PM CDT Fri Aug 21 2026
Slightly below normal temperatures continue into Monday, but the aforementioned trough moves east by Tuesday.
With ridging to the west, northwest flow sets up over Middle TN through the end of the week.
Temperatures will warm a few degrees, but will still be seasonably normal.
Northwest flow also allows for daily low to medium rain & thunderstorm chances to return Tuesday through the end of the week.