textproduct: Morristown
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
Updated at 1216 AM EDT Sun Aug 23 2026 - Showers and storms are currently isolated and expected to dissipate shortly after midnight.
- Clearing skies in the early morning hours will lead to fog in the morning hours. Fog may be dense in spots.
- A cold front will move through the region by morning bringing cooler, drier conditions today and tomorrow. - Rain chances will return by Wednesday.
DISCUSSION
Issued at 1216 AM EDT Sun Aug 23 2026
The cold front is currently on our doorstep over Eastern Kentucky and the Cumberland Plateau on the latest analysis. Showers and storms are currently isolated but new activity is popping up in the foothills of the East Tennessee mountains. CAMs and the NBM agree that showers and storms will dissipate by 1 or 2 AM EDT. Confidence is increasing that clouds will clear out before sunrise and fog will likely be an issue this morning. The front will move through tonight bringing cooler temps and lower dew points today and tomorrow. Sunday and Monday dew points will be in the 50s and highs will be in the 80s (Chattanooga area may hit 90-91).
Sunday through Tuesday will be dry with high pressure at the surface. The upper level pattern will be about the same with a deep trough on the East Coast and a ridge centered over the Rockies.
The NBM has low rain chances Wednesday increasing to 40-60% chances by Thursday. The trough will be centered over the Ohio Valley again by midweek with a shortwave rotating through the pattern on Thursday.
AVIATION
(00Z TAFS) Issued at 739 PM EDT Sat Aug 22 2026
Strong storms in Middle Tennessee and Southeast Kentucky will likely weaken as they move into the region. Some showers will still be possible late this evening as a cold front approaches. Some thunder will be possible but confidence is low. In the early morning hours, some fog development will be possible after the cold front moves through mainly near TRI. There is some uncertainty if the front stalls and clouds linger longer than expected.
PRELIMINARY POINT TEMPS/POPS
Chattanooga Airport, TN 91 65 91 67 / 0 0 0 10 Knoxville McGhee Tyson Airport, TN 87 62 87 63 / 0 0 0 10 Oak Ridge, TN 87 61 87 62 / 0 0 0 10 Tri Cities Airport, TN 81 57 82 57 / 10 0 0 0
MRX WATCHES/WARNINGS/ADVISORIES
NC...NONE. TN...NONE. VA...NONE.
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