Area Forecast Discussion
Issued by NWS Knoxville/Tri Cities, TN

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FXUS64 KMRX 231852
AFDMRX

Area Forecast Discussion
National Weather Service Morristown TN
252 PM EDT Sat Sep 23 2017

.SHORT TERM (Tonight and Sunday)...
The large high pressure ridge to our northwest will drift east and
be positioned over the eastern Great Lakes tomorrow, while an upper
low near the Gulf Coast will drift west. The resulting flow across
the Appalachians will be easterly, with a greater downslope
component than we have seen the past few days. This should have a
stabilizing effect for our area tomorrow. Forecast soundings and
convective parameters also show less potential for development
tomorrow, so a dry forecast will be continued for the whole area on
Sunday. Fog potential tonight will mainly be limited to areas that
have a shower this afternoon/evening, like the Sequatchie Valley and
SW NC valleys. High temps will continue to be above normal tomorrow,
in the mid/upper 80s across the Valley.

.LONG TERM (Sunday night through Saturday)...
All remains quiet through at least Wednesday as high pressure
continue to control area weather. This will keep the forecast dry
with above normal temperatures. The weather pattern changes on
Thursday as a weakening cold front pushes across the Southern
Appalachian Region. There is minimal moisture and only limited
energy associated with the front. As a result...expect to see an
increase in cloud cover with only a slight chance of showers and
thunderstorms. On Friday...a dry and cool air mass will push in
behind the exiting frontal boundary. Confidence becomes quite low
by the end of the extended...but could see an upper low drop into
the Ohio Valley and this could rotate in some isolated
convection... mainly along the East TN mountains for Saturday. For
now...will leave the rest of the area dry with near seasonal
temperatures.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             66  88  66  87 /  10   0   0   0
Knoxville McGhee Tyson Airport, TN  64  87  64  86 /   0   0   0   0
Oak Ridge, TN                       64  87  64  86 /   0   0   0  10
Tri Cities Airport, TN              58  87  60  84 /   0   0   0   0

&&

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

$$

DGS/MJB


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