textproduct: Morristown

KEY MESSAGES

Updated at 704 AM EDT Sun Aug 30 2026 - Warming temps into next week with highs in the low to mid 90s. Heat index values of 100-105 degrees for central and southern TN Valley are probable.

- Dry conditions continue for most places, outside of some diurnal rain and storm chances across the east TN mountains and perhaps the Cumberland Plateau.

DISCUSSION

Issued at 246 AM EDT Sun Aug 30 2026

Not much change with this forecast package. Isolated, diurnal, showers and storm chances continue each day across the east TN mountains and perhaps the Cumberland Plateau. The main story is the building heat due to a strong ridge of high pressure.

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. It's possible that some of our southern areas may approach Heat Advisory criteria at some point. As we get closer to the end of the week, and into Labor Day Weekend, the high may retrograde west again as an upper trough swings down into New England. This may put us back in a northwest flow pattern, which would increase our chances of rain and bring slightly cooler high temps.

AVIATION

(12Z TAFS) Issued at 704 AM EDT Sun Aug 30 2026

Persistent forecast with prevailing VFR conditions and light winds through the period. Additional fog/br possible at TRI tomorrow morning, but HREF continues to paint negligible probabilities of MVFR conditions.

PRELIMINARY POINT TEMPS/POPS

Chattanooga Airport, TN 93 72 95 72 / 0 0 10 0 Knoxville McGhee Tyson Airport, TN 92 71 93 72 / 10 0 0 0 Oak Ridge, TN 91 71 93 71 / 0 0 10 0 Tri Cities Airport, TN 88 67 90 68 / 0 0 0 0

MRX WATCHES/WARNINGS/ADVISORIES

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