Winter Weather Advisory (5:45 a.m)

The National Weather Service in Nashville has finally decided to issue a winter weather advisory for the Cumberland Plateau for today. The advisory expires at 6:00 pm. I had wondered if they would include Fentress County and they did, per latest guidance.

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As is often the case with systems like this, the moisture has moved in a bit earlier. The main brunt of moisture should still hold off until after 7:00 or so, but there are some raindrops, etc out there this morning. Temps are currently in the low to mid 30s across the plateau.

As more and more moisture moves in, our temps will drop. Our air is very dry right now and as rain fall through it, the rain evaporates. Evaporation is a cooling process and that will drop the temperature on down. That, in turn, will change any liquid precip to snow.

The NWS thinks some of us will see up to two inches of snow. While that is possible, I think that will be confined to isolated areas and the highest elevations. Remember, there are always those isolated areas that end up with a bit more than everyone else. Generally, I think most of us will stay around an inch.

One adjustment I need to make is to increase the snow accumulation for Fentress and Overton Counties. I now think you all could pick up a half inch to one inch. There’s a bit more moisture coming your way that should help with you all’s accumulation.

A winter weather advisory means there could be some slick spots on area roads. Major impacts to travel are not expected from snow. Plus, many major roads have been pre-treated across the plateau. Just be careful on bridges, overpasses, and back roads today.

Precip is still expected to be on the lighter side, though some moderate bursts of snow are certainly possible. There’s a lot of moisture with this system and we’re on the northern fringes of it.

The radar looks kinda cool this morning. Like I said, our air is very dry here at the surface. Our radar is located in Nashville and that beam increases in height as it goes away from the radar site. Notice how it looks like there’s no precip near Nashville but there is precip the farther out you go. That radar beam, as it gets higher in the sky the farther away from Nashville it gets, is detecting virga, or precip that evaporates before it hits the ground. Pretty neat, huh?

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You all just drive safe today. Allow yourself extra time to get where you’re going and you should be fine, weatherwise.

I’ll have a full morning blog update later this morning!

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