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

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000 FXUS64 KMRX 090828 AFDMRX Area Forecast Discussion National Weather Service Morristown TN 328 AM EST Sat Dec 9 2017 .SHORT TERM...(Today and Tonight)...Radar shows some light snow sill affecting eastern parts of the area. This last batch of snow will be moving out this morning, but appears enough may linger past sunrise in the warning/advisory areas to warrant extending these to 15Z. Will see some brief clearing ahead of the next upper trough that will dig into the area late today/early tonight, along with a reinforcing shot of colder air. Will see some snow showers/flurries moving in late today and continuing into tonight mainly north and mountains. The better low level instability and moisture will not linger long, so the snow showers should be ending by late tonight. Higher terrain areas of the north and in the TN mountains from the smokies north may pick up an inch or two of snow. Will mention in HWO. It will also be quite cold along with significant wind, so wind chill values in the higher terrain may dip below zero in some spots. .LONG TERM...(Sunday through Friday)...A couple more episodes of active weather occupy part of the extended forecast. After a dry Sunday and Monday, another short wave descends out of Canada driving south through the Eastern U.S. More chilly polar air accompanies the feature on Tuesday with some light rain, as well as a few snow showers to the higher terrain areas. These mountain locales may pick up an inch or two of snow with the aid of orographic lift. The forecast area should enjoy another break in the action on Wednesday while awaiting more short wave energy diving through the back side of the prevailing eastern states upper trough. Late week modeling indicates another couple clipper systems build in for a mixture of more rain and snow Thursday into Friday. A bit too far out for much detail concerning this event, but it looks like more orographic snow in the terrain, with a mixture of rain and snow in the valley as another surge of polar air invades the Southeastern U.S. && .PRELIMINARY POINT TEMPS/POPS... Chattanooga Airport, TN 44 25 42 28 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 40 25 40 28 / 10 10 0 0 Oak Ridge, TN 40 25 40 28 / 10 10 0 0 Tri Cities Airport, TN 39 23 36 24 / 40 30 10 0 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...Winter Storm Warning until 10 AM EST this morning for Cherokee- Clay. TN...Winter Weather Advisory until 10 AM EST this morning for Blount Smoky Mountains-Cocke Smoky Mountains-East Polk-Johnson- Northwest Carter-Northwest Greene-Sevier Smoky Mountains- Southeast Carter-Southeast Greene-Southeast Monroe-Sullivan- Unicoi-Washington TN. VA...Winter Weather Advisory until 10 AM EST this morning for Washington. && $$ is the U.S. government's official web portal to all federal, state and local government web resources and services.