textproduct: Morristown

KEY MESSAGES

Updated at 1242 AM EDT Sat Aug 8 2026

- Daily showers and storms continue into next week, especially in the afternoon and early evening. Coverage will be greatest along the higher terrain.

- Isolated flooding and strong wind gusts are possible with the strongest storms.

- Temperatures will be generally near to slightly above normal.

DISCUSSION

Issued at 1242 AM EDT Sat Aug 8 2026

A mid/upper level circulation is located over AR, and this will be the main feature of the pattern across the region into early next week. The low will slowly track east today, putting our area in a midlevel deformation zone. The high PW and weak flow aloft points to another day of scattered to numerous showers and storms that have little movement, initiating over the higher terrain and mainly propagating into the Valley with new development on outflow boundaries. As we have seen for the past few days, these slow-moving storms can produce locally heavy rainfall and gusty winds - expect the same potential today. Sunday looks similar as the closed low transitions to an open wave, but still remains over West/Middle TN. PW values remain in the 1.8-2 inch range with 1000-1500 J/kg MLCAPE and negligible shear. The trough moves over the area on Monday, which may give a little better instability and shear, particularly in the southern half.

By Tuesday, the pattern will become more northwesterly with the trough to our east and a high pressure ridge to our west. This brings some drier air aloft to the area, along with some steeper mid- level lapse rates. These storms could pose a little more of an organized severe threat, although shear still looks weak. For Wednesday and beyond, we will remain in a NW flow with embedded shortwave troughs bringing some daily chances of showers and storms. Specifics on timing and severe/flooding potential are uncertain at this time.

AVIATION

(06Z TAFS) Issued at 1242 AM EDT Sat Aug 8 2026

For the upcoming 06z aviation package, ensemble guidance has fairly high probabilities for fog and low clouds through daybreak at KTYS and KCHA. Given satellite imagery shows fog/low clouds forming INVOF KCHA already, this guidance seems reasonable. Included a TEMPO for some IFR flight categories at KCHA but will leave KTYS at MVFR levels. Chances for IFR conditions are lower there in guidance. Those are the main points. Saturday afternoon should be similar to Friday, so a PROB30 for TSRA should cover that. Winds will be light through the period.

PRELIMINARY POINT TEMPS/POPS

Chattanooga Airport, TN 91 73 92 73 / 50 10 70 20 Knoxville McGhee Tyson Airport, TN 90 71 91 73 / 40 10 30 10 Oak Ridge, TN 89 71 90 72 / 50 10 40 10 Tri Cities Airport, TN 86 68 88 69 / 40 20 30 10

MRX WATCHES/WARNINGS/ADVISORIES

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