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

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000 FXUS64 KMRX 190745 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 345 AM EDT Tue Sep 19 2017 .Short Term...
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For the near term, GOES-16 Fog Channel and area observations once again show fog development along the river valleys and lakes. Some of the fog will be locally dense. For Today, a weak short-wave over the western Ohio and Tennessee Valley will move into the area this afternoon and tonight. Model soundings show a marginally moist/unstable airmass with MLCAPEs of 1000 j/Kg. Low-level forcing is limited with this wave. Best chance of convection today will be across the Plateau given the orographic lift. Another round of patchy fog development is expected early Wednesday morning. .Long Term (Wednesday through Monday)...A slow moving upper trough over the forecast area will bring chance/slight chance of showers and thunderstorms in the wake of the weak frontal passage. The Appalachians will remain on the fringe of the high building into the region by Thursday. Thus, chances for showers and thunderstorms continues particularly for the higher terrain while valley locations have less chances to see measurable precipitation. Diurnal showers and thunderstorms persist into Saturday afternoon before drier conditions follow into early next week. Temperatures through the remainder of the week will be near or slightly above seasonal normals.
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&& .PRELIMINARY POINT TEMPS/POPS...
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Chattanooga Airport, TN 87 68 86 67 / 30 20 30 10 Knoxville McGhee Tyson Airport, TN 85 66 84 65 / 20 20 20 10 Oak Ridge, TN 85 66 85 66 / 30 20 20 10 Tri Cities Airport, TN 83 61 83 60 / 10 20 30 10
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&& .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && $$

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