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

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FXUS64 KMRX 250742
AFDMRX

Area Forecast Discussion
National Weather Service Morristown TN
342 AM EDT THU AUG 25 2016

.SHORT TERM (Today and Tonight)...A ridge of high pressure will
remain over the Southern Appalachian region today. The position of
the surface through 85h ridge will allow for the advection of
higher dewpoint air into the forecast area. Diurnal convection
is possible with sufficient instability compliments of the humid
airmass. However, the best chance for a cooling shower or
thunderstorm will be over the higher terrain on the plateau and
over the mountains bordering North Carolina with little chance for
rain across the Great Valley. Stayed near guidance max and min
temperatures through the short term which continue to be a few
degrees above normal for late August.

.LONG TERM (Friday through Wednesday)...A persistence forecast will
be followed for much of the long term period, with little changes
needed from the previous forecast. The large high pressure ridge
will remain over the Southern Appalachian region through the
period, producing mostly dry conditions with above normal
temperatures. Each model run brings lower pops than the one before,
so will continue to undercut pops through the period, with only
slight chances in the mountains and Plateau. The ridge begins to
show some signs of breaking down by Wednesday.

&&

.POINT TEMPS/POPS...
Chattanooga Airport, TN             91  74  93  73 /  20  10  20  10
Knoxville McGhee Tyson Airport, TN  90  72  93  71 /  20  10  10  10
Oak Ridge, TN                       91  73  93  71 /  20  10  10  10
Tri Cities Airport, TN              87  68  92  67 /  20  10  10  10

&&

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

$$





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