textproduct: Morristown

KEY MESSAGES

Updated at 736 PM EDT Mon Jul 13 2026

- Scattered showers and storms continue into this evening. Flood Watch remains in effect until 8 PM EDT as isolated flooding remains possible.

- Though chances are very low, cannot rule out a strong gusty wind or two in any stronger thunderstorm.

- More typical summer weather Wednesday onwards with near normal temperatures and only a low PM chance of scattered thunderstorms.

DISCUSSION

Issued at 218 PM EDT Mon Jul 13 2026

Discussion:

An upper low continues to rotate across the region this afternoon, producing isolated to scattered showers and storms. The environment remains conducive for isolated flooding. This is due to the combination of antecedent rainfall and a continued high PW environment with efficient warm rainfall processes in place. Flooding will be most likely across areas that have recently seen heavy rain and flooding and receive additional moderate to heavy precip amounts through this evening. An additional, localized, 1 to 3 inches of rainfall are expected through this evening. Pin pointing where these higher amounts will occur is tough, due to the random and pop-up nature of the precip. Bottom line, though most places will not have any issues, additional isolated flooding is possible through this evening for some.

The central circulation of the upper low, currently across northern AL, jogs southwest this evening. This southwest jog, combined with loss of daytime heating, will allow for showers and storms to become more isolated as well as diminish across our area. Additional showers and storms expected on Tuesday but hopefully not as widespread as today. The areas most likely to see them will be along I-40 and south, closer to the vicinity of the upper low circulation, or what's left of it.

By Wednesday and beyond, we return to the more typical summer- like pattern. Mostly dry conditions, upper 80s to low 90s, and with daily chances for diurnal convection, mainly focused across our high terrain areas.

AVIATION

(00Z TAFS) Issued at 736 PM EDT Mon Jul 13 2026

Some storms have developed near CHA and TYS. After midnight, showers and storms will likely dissipate. Cloud cover overnight will likely keep most areas from seeing fog development but it will be possible near TYS and TRI if enough clearing occurs. MVFR CIGs are likely late tonight through the morning hours at TYS and CHA. Scattered showers and storms are likely tomorrow afternoon and evening mainly from TYS southward with the best chances near CHA.

PRELIMINARY POINT TEMPS/POPS

Chattanooga Airport, TN 70 84 70 88 / 40 80 30 50 Knoxville McGhee Tyson Airport, TN 68 86 69 88 / 10 50 10 20 Oak Ridge, TN 67 86 68 88 / 20 30 10 20 Tri Cities Airport, TN 64 86 62 90 / 10 10 0 0

MRX WATCHES/WARNINGS/ADVISORIES

NC...Flood Watch until 8 PM EDT this evening for Cherokee-Clay.

TN...Flood Watch until 8 PM EDT /7 PM CDT/ this evening for Anderson- Bledsoe-Blount Smoky Mountains-Bradley-Campbell-Claiborne- Cocke Smoky Mountains-East Polk-Grainger-Hamblen-Hamilton- Hancock-Hawkins-Jefferson-Johnson-Knox-Loudon-Marion-McMinn- Meigs-Morgan-North Sevier-Northwest Blount-Northwest Carter- Northwest Cocke-Northwest Greene-Northwest Monroe-Rhea- Roane-Scott TN-Sequatchie-Sevier Smoky Mountains-Southeast Carter-Southeast Greene-Southeast Monroe-Sullivan-Unicoi- Union-Washington TN-West Polk.

VA...Flood Watch until 8 PM EDT this evening for Lee-Russell-Scott VA- Washington VA-Wise.