171 
FXUS64 KMRX 071821
AFDMRX

Area Forecast Discussion
National Weather Service Morristown TN
221 PM EDT Tue Apr 7 2026

...New DISCUSSION...

.KEY MESSAGES...
Updated at 219 PM EDT Tue Apr 7 2026

- Dry weather is expected for the forecast period.

- Seasonably cool into Wednesday, followed by a strong warming
  trend.

&&

.DISCUSSION...
Issued at 219 PM EDT Tue Apr 7 2026

Canadian high pressure currently centered to our north will 
continue to extend into our area as it slides east through 
Wednesday. This high is providing dry and seasonably cool 
conditions. Patchy frost will be possible late tonight especially 
in normally colder outlying valley areas, with the highest chance 
for frost across the north. Temperatures in these locations will 
likely dip into the mid to upper 30s. and a few spots in the north
will bottom out around freezing. Relative humidity values are low
this afternoon and will be low again Wednesday afternoon, 
bottoming out in the 20s in most locations. High temperatures 
Wednesday will be close to normal for this time of year. 

Heights will be rising Thursday and high pressure will continue to 
extend into the area.  A few locations mainly north may see patchy 
frost again late Wed night, but after a chilly start Thursday 
temperatures in most valley locations will rise into the 70 to 75 
range signaling the start of a strong warming trend. Temperatures 
are expected to climb well above normal by the Saturday through 
Tuesday time frame with most valley locations seeing highs in the 
lower to mid 80s. Relative humidity values will be low each 
afternoon at least into the weekend.  Models generally agree that we 
will see the dry conditions continue through the weekend into early 
next week. However, some models show a weak and moisture starved 
cold front possibly making it far enough south to bring a few light 
showers to our northern areas around the Saturday time frame. 
However, right now this looks like a minority solution and the 
weekend is likely to stay dry. By Tuesday, a system approaching from 
the west may be close enough to bring a few showers or storms, but 
again the probability of precipitation looks quite low at this
time. 

&&

.AVIATION...
(18Z TAFS)
Issued at 1222 PM EDT Tue Apr 7 2026

VFR conditions expected for the period all sites. Winds will be
north and northeast around 10kts or less early with a few higher
gusts especially at CHA, then winds will become light. 

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             44  72  46  75 /   0   0   0   0 
Knoxville McGhee Tyson Airport, TN  39  71  43  73 /   0   0   0   0 
Oak Ridge, TN                       40  72  43  73 /   0   0   0   0 
Tri Cities Airport, TN              33  67  36  71 /   0   0   0   0 

&&

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

$$

DISCUSSION...99
AVIATION...99


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