textproduct: Morristown

KEY MESSAGES

Updated at 702 AM EDT Sat Aug 29 2026 - Hot and humid weather arrives this weekend. Afternoon highs in the low to mid 90s with heat index values of 100-105 degrees seem plausible for the middle of next week.

- Dry conditions should prevail for most places through the coming week, though some isolated storms each day can't be ruled out. That being said, after this afternoon, the best chances will be over the Smokies.

DISCUSSION

Issued at 234 AM EDT Sat Aug 29 2026

It's a quiet night across eastern TN/southwestern VA/southern NC. The majority of this evening's convective activity has occurred off to the south and east of our forecast area. For tonight, temperatures cool into the low to mid 60s under mostly clear skies. Winds are light to calm and we could see areas of fog develop near the regions waterways. Any fog that does form will quickly burn off after sunrise Saturday morning.

Our weather pattern over the next week or so will be dominated by an upper level ridge feature that'll keep us hot, humid, and mostly dry. Any afternoon convection that does fire should form along the Smokies and drift east into the Carolinas. This upper level ridge will do a few things for us. First, we'll see warmer temperatures return. Highs in the 90s each day with some locations seeing temperatures in the mid to possibly upper 90s in SE TN. Second, it'll usher in higher surface dew points and that'll combine with the warmer temperatures to support higher heat indices in the 100 to 105 range each day. Lastly, outside of the Smokies it'll be pretty dry. While this ridge is strong, it isn't immune to the train of shortwave troughs guidance brings through over the next week or so. Looking ahead, there is some signal to support a stronger trough just in time for next weekend. That could help nudge this ridge back to the west and allow for slightly cooler and drier air to return. However, that's over a week away and guidance doesn't handle these types of upper level patterns too good imho. For now, sit back and enjoy the end of Summer.

AVIATION

(12Z TAFS) Issued at 702 AM EDT Sat Aug 29 2026

Persistence forecast with VFR conditions and light winds through the period. Light fog possible at TRI again tomorrow morning but concerns are not great enough to include any category reductions this far out.

PRELIMINARY POINT TEMPS/POPS

Chattanooga Airport, TN 93 72 92 71 / 10 0 20 0 Knoxville McGhee Tyson Airport, TN 91 70 91 70 / 10 0 10 0 Oak Ridge, TN 91 70 91 69 / 10 0 0 0 Tri Cities Airport, TN 88 65 88 67 / 10 0 0 0

MRX WATCHES/WARNINGS/ADVISORIES

NC...NONE. TN...NONE. VA...NONE.