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

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312 FXUS64 KMRX 120334 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 1034 PM EST Mon Dec 11 2017 .DISCUSSION... Upper trough continues to deepen as a shortwave trough dives southeastward through Missouri this evening helping to push a strong cold front into our region by Tuesday morning. Moisture is limited with this front, but brisk northwest winds will help to provide orographic lift during the day along the higher terrain. This will result in some scattered snow showers and flurries on Tuesday with light accumulations generally at or above about 2000 feet and 1"-2" possible across the highest terrain. Cold temperatures and gusty NW winds will also lead to dangerously cold wind chill values atop the TN/NC mountains with wind chill values Tuesday night in the -5F to -10F range. Made some adjustments to hourly temperatures and minimum temperatures tonight by adjusting them upwards a few degrees. Increased southwesterly winds ahead of the front and high clouds are keeping the boundary layer more mixed and keeping temperatures higher in the 30s and 40s in all areas except for SW NC where lingering snow cover and sheltered valleys are allowing temperatures to drop into the 20s. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 37 43 25 43 / 10 0 0 10 Knoxville McGhee Tyson Airport, TN 35 40 22 39 / 10 10 10 10 Oak Ridge, TN 36 40 22 38 / 10 10 10 10 Tri Cities Airport, TN 32 38 16 33 / 10 30 20 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...None. TN...Winter Weather Advisory from 4 AM to 9 PM EST Tuesday for Blount Smoky Mountains-Cocke Smoky Mountains-Johnson-Sevier Smoky Mountains-Southeast Carter-Southeast Greene-Unicoi. Wind Chill Advisory from 10 PM Tuesday to 7 AM EST Wednesday for Blount Smoky Mountains-Cocke Smoky Mountains-Johnson-Sevier Smoky Mountains-Southeast Carter-Southeast Greene-Unicoi. VA...None. && $$ JB

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