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

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000 FXUS64 KMRX 211848 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 248 PM EDT SUN AUG 21 2016 .SHORT TERM /Tonight and Monday/... A cold front continues to march across the eastern Tennessee Valley this afternoon...stretching from the highlands of SW Virginia back into southern Middle Tennessee. Any associated showers and isolated thunderstorms tied to the frontal passage should shove east into NC over the next couple of hours...and will taper off by 21z or so. A cooler and drier air mass will filter into the region in wake of the front. Clearing will begin to occur over the course of the evening...with most areas becoming mostly clear late tonight. The combination of the clear sky...light winds and moist boundary layer will result in patchy fog development across the entire region through the morning rush hour commute. Cooler air will also filter in late tonight. This...along with the clearing sky (which will allow for good radiation cooling) will result in low temperatures bottoming out in the mid 50s to lower 60s! These temperatures will be between 10-15 cooler than what the region has seen in several weeks. A cool northeast flow tomorrow will help to keep high temperatures in check in the low to mid 80s in most locations...despite the abundant sunshine. .LONG TERM /Monday Night through Sunday/... High pressure will be the dominant feature through at least Wednesday. Temperatures will be near to a degree or two below normal...with clear skies and light winds. Wednesday...enough instabiltiy will be present in the afternoon for scattered showers and thunderstorms...though nothing strong or severe expected at this time. Very little movement would be present so isolated gusty winds and heavy rainfall would be the main threat. By trough moving east through the Ohio Valley will swing a boundary through the area. Convection in the coastal states looks to block much of the moisture and energy that could make its way to the not looking at much in the way of shower or thunderstorm development. Friday through Sunday...the high pressure centers over the area. Warming temperatures are expected each day...with enough instabilities for diurnal showers and thunderstorms each afternoon. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 65 87 64 90 / 20 10 0 10 Knoxville McGhee Tyson Airport, TN 63 85 62 88 / 10 10 0 0 Oak Ridge, TN 63 85 61 88 / 10 10 0 0 Tri Cities Airport, TN 58 82 56 85 / 10 10 0 0 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && $$ AMP/JW is the U.S. government's official web portal to all federal, state and local government web resources and services.