textproduct: Morristown

KEY MESSAGES

Updated at 713 AM EDT Wed Sep 9 2026 - Dry conditions are expected today. Scattered to numerous showers and storms will be possible Thursday evening into the overnight hours in the northern half of the region.

- Friday, Saturday and Sunday will have scattered showers and storms possible areawide mainly in the afternoon and evening hours.

- Above normal temperatures expected through the forecast period.

DISCUSSION

Issued at 230 AM EDT Wed Sep 9 2026

In the upper levels, the ridge over the Southeast starts to flatten today as a broad trough moves into the Midwest and Ohio Valley. At the surface, a cold front will be over the Ohio Valley tonight. Dry weather will continue today through Thursday afternoon. Thursday evening and into the overnight hours, showers and storms will increase, mainly in the northern third of the region as a decaying cold front slowly moves down from the north. A minor shortwave moving through the pattern may also enhance activity. Perhaps a few strong storms can't be ruled out in the evening hours but overall instability will be decreasing significantly if this timing holds.

Daily rain chances are expected mainly in the afternoon and evening hours from Friday through the weekend possibly into early next week. In the upper levels, nearly zonal flow will be in place with minor short waves moving through the pattern at times. The weak surface boundary will also be lingering over or near the region through the weekend. Showers and storms will likely be scattered at times. NBM has the highest chances on Saturday afternoon.

Early next week, a ridge will be over the Southeast. Isolated to scattered showers and storms will be possible with the highest chances in and near the terrain. Afternoon highs will be above normal throughout the forecast period with upper 80s expected near Tri-Cities and lower 90s for Knoxville and Chattanooga areas, generally about 6 to 8 degrees above normal.

AVIATION

(12Z TAFS) Issued at 713 AM EDT Wed Sep 9 2026

Main concern is low probability of fog development at TRI early this morning due to proximity to Boone Lake. Otherwise, VFR conditions anticipated at all TAF sites through the forecast. There is patchy areas of 5-6 kft cloud cover near the TRI and TYS.

Ridging surface and aloft will keep conditions dry.

PRELIMINARY POINT TEMPS/POPS

Chattanooga Airport, TN 94 70 96 71 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 91 68 92 70 / 0 0 0 10 Oak Ridge, TN 90 67 91 68 / 0 0 0 20 Tri Cities Airport, TN 86 64 87 66 / 0 0 10 30

MRX WATCHES/WARNINGS/ADVISORIES

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