textproduct: Morristown

KEY MESSAGES

Updated at 721 PM EDT Sat Aug 29 2026 - 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 135 PM EDT Sat Aug 29 2026

Currently the afternoon convection has started in the far southern Appalachian Mountains on the TN/NC/GA border area. There is very little steering flow present out there as ridging builds in from the west.

The upcoming week looks to be a rather unpleasant return to hot and muggy conditions as an upper level ridge locks in over the southern United States. This will lead to temperatures climbing into the 90's for most locations every afternoon this week. And unfortunately along with this the dew points will rise back into the upper 60's to lower 70's making for high heat index values near or just above the triple digit mark. Any afternoon convection that does fire should form along the Smokies and drift east into the Carolinas. Outside of the southern Appalachian Mountains it will remain pretty dry this week for most of the Valley. There is a possibility a shortwave moving around the ridge comes in a bit stronger and is able to make a dent into it and bring in more widespread storms, but this looks somewhat unlikely at this time. 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.

AVIATION

(00Z TAFS) Issued at 721 PM EDT Sat Aug 29 2026

VFR conditions and light southerly winds less than 10kts are expected through the period at all sites. However, a brief period of near MVFR fog is expected at TRI late tonight.

PRELIMINARY POINT TEMPS/POPS

Chattanooga Airport, TN 71 93 72 95 / 0 10 0 0 Knoxville McGhee Tyson Airport, TN 70 92 71 93 / 10 10 0 0 Oak Ridge, TN 70 91 71 93 / 10 0 0 0 Tri Cities Airport, TN 66 89 67 90 / 0 0 0 0

MRX WATCHES/WARNINGS/ADVISORIES

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