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

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029 FXUS64 KMRX 231852 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 252 PM EDT Sat Sep 23 2017 .SHORT TERM (Tonight and Sunday)...
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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.
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&& .PRELIMINARY POINT TEMPS/POPS...
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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
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&& .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && $$ DGS/MJB

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