333 
FXUS64 KMRX 201726
AFDMRX

Area Forecast Discussion
National Weather Service Morristown TN
126 PM EDT Tue Oct 20 2026

...New DISCUSSION, AVIATION...

.KEY MESSAGES...
Updated at 118 PM EDT Tue Oct 20 2026

- Dry weather dominates the forecast period, with cool mornings
  and pleasant afternoons each day. Afternoon relative humidity
  will remain on the lower side as well.

&&

.DISCUSSION...
Issued at 118 PM EDT Tue Oct 20 2026

Morning fog along rivers and lakes will be possible again late
tonight as cold air moves over warm waters. This will probably
repeat each morning for the next several days. Otherwise, we will
have dry and sunny weather for the remainder of the week as a
large mid/upper ridge builds to our west in a blocking pattern, 
and gradually shifts east.

One adjustment to the forecast grids will be to lower dewpoints,
which have been too high in the NBM today. Went with NBM 10th
precentile for the daytime hours through Friday. 

&&

.AVIATION...
(18Z TAFS)
Issued at 118 PM EDT Tue Oct 20 2026

No aviation impacts are forecast this period. There may be some
fog near the area rivers and lakes, but the chance of fog at the
terminals appears too low to mention at this time.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             49  76  49  75 /   0   0   0   0 
Knoxville McGhee Tyson Airport, TN  46  76  45  74 /   0   0   0   0 
Oak Ridge, TN                       47  76  46  75 /   0   0   0   0 
Tri Cities Airport, TN              40  74  40  72 /   0   0   0   0 

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...NONE.
VA...NONE.
&&

$$

DISCUSSION...DGS
AVIATION...DGS


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