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

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000 FXUS64 KMRX 180918 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 418 AM EST Mon Dec 18 2017 .SHORT TERM...
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(Today and Tonight)... Some very light drizzle is getting squeezed out of the atmosphere early this morning. But the biggest story is the widespread fog over the area, with most locations seeing visibilities in 1/2 to 2 mile range. Low level clouds over us are helping to keep temperatures a bit warmer, which should hopefully stave off dense radiation fog from forming. This should last into the morning with the low clouds helping to block out some of the sun and keeping the fog around. Eventually the sun should be able to peak through in some locations and we will begin to warm into 50`s in the Valley. .LONG TERM...(Tuesday through Sunday)... Active weather pattern will keep region wet through most of the extended period. Dry early Tuesday but surface low pressure moving from East Texas then across Mississippi Valley to the Southern Tennessee Valley Tuesday afternoon brings with it a lot of rain...especially southern parts of the forecast area late Tuesday night through Wednesday morning...some sections of southern Tennessee and southwest North Carolina could see over 2 inches of rainfall. This slow moving surface low and cold front will exit by Wednesday night then skies clear as surface high builds in from the Ohio Valley. Fair weather will be short lived and only last through Thursday evening as another frontal system moves into the plains states Thursday and then heads for the southern Great Lakes Friday. Clouds increase overnight Thursday and with good southerly flow ahead of the system Friday showers will become likely Friday and Friday night. A secondary front behind the first front will allow for extended rain chances through Saturday and with the front becoming stationary just to the southeast a continued chance of showers through Sunday. Temperatures will stay mild through Christmas Eve. Highs Tuesday should reach the 50s to near 60. It will cool somewhat Wednesday with temperatures mid 40s northeast to upper 50s to near 60. For the remainder of the forecast highs stay mostly in the 50s with lows in the 40s to lower 50s early Wednesday and then cool to the 30s to lower 40s Thursday and Friday and 40s for the weekend
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&& .PRELIMINARY POINT TEMPS/POPS...
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Chattanooga Airport, TN 59 46 61 54 / 10 10 60 90 Knoxville McGhee Tyson Airport, TN 57 43 60 50 / 10 0 40 80 Oak Ridge, TN 57 43 59 49 / 10 10 40 80 Tri Cities Airport, TN 55 39 59 45 / 20 10 30 60
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&& .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...None. VA...None. && $$ ABM/TD

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