dwagner88

We don't use it very often because it is both extremely expensive and extremely corrosive.

The calcium is good to around zero. That's what we've been using up there all day. Salt and brine are already worthless at current temps. We are trying to get a lane cleared in each direction before the sun goes down.

I'm working on it. Just sent a grader and two trucks with liquid calcium chloride up there.

Just went on a long drive out to the Rhea/Roane county line. Spring City might get a foot. They had over 6" when I left and it was snowing about as hard as I have ever seen. I parked my truck for 20 minutes and got just under 2" on the mirrors and the toolbox.

Right next to Apison elementary. It’s actually picked back up now. I would call it moderate. Maybe the column has cooled enough to get rid of some of the sleet.

I think the transition is in between you and me. I had nice flakes 20 minutes ago, now mostly sleet again. Shame too. The radar actually looks amazing.

I actually don’t think Chattanooga is going to get screwed. The entire area except eastern Polk has wetbulbed below freezing. There appears to be no mechanism to allow for warming today with precipitation falling, solid cloud cover, and continued push south of Arctic air. We are going to get frozen precipitation, the only question is what form does it take? I hope for more snow, but with the first wave it started as light snow and finished as sleet. Currently it’s 30 degrees with a DP of 27 IMBY. There is a light accumulation of sleet on elevated surfaces. No precip right now.

Definitely. I’m at 32.2 now but we have a warm nose problem. I started all snow and now I’m 100% sleet.

Down to 33 here. Very light snow continues. DP is 28. All systems go as long as we don't get a warm nose.

I'm south of you and I am all snow, but it's light. Not sure what's going on there. Maybe some colder air trapped on this side of the ridges.

Temp 36.3 DP 28.2. That should be enough to wet bulb to 32 or lower. Just need to get some qpf now. So far no flakes on the east side of white oak mtn. Edit: Right as I posted that, we have tiny flakes. No sleet that I can hear. Appears to be all snow just extremely small flakes.

Temp 38 DP 30. Close but no cigar yet. Looks like in N. Alabama the sleet/snow line has pushed south a little in the last few frames. That is encouraging.

This tracks. I think your PWS is pretty accurate. I'm reading a temp of 40.8 (it is dropping pretty steadily now) and a DP of 31.4. The temp drop is encouraging, but the DP has basically been steady all afternoon. I'd like to see it drop down a bit. Surface wetbulb is way above freezing right now, but that doesn't mean we can't cool further.

FWIW my temp is completely stalled at 44 DP 30 for the past 2 hours. Not sure the CF is making much progress. That may lend more credence to the NAM. I'm in a really bad spot for this one though. Almost as far SE as you can get in Hamilton county.

I'm not sure. I didn't look at the hourly frames. But I did notice a couple of things. The accumulations shot further down into north AL and GA, but they clearly aren't all snow. The difference between the 10:1 and Kuchera is too much. I think it's sleet. I also think it's kinda pointless to look at it at such a fine grained level. There will be a warm nose somewhere, but there's no way the models are going to nail that down precisely. I still think the arctic air wins out and the sleet is minimal.

It's also mixing down here. Kuchera is lower than 10:1.

Not sure what algorithm the Carrot weather app uses, but I woke up to a forecast of 10” of snow from it this morning. Not ending until Wednesday. I don’t put much stock in that, but it is interesting to see.

It appears to have given my area a little more buffer to the southern edge. It got more of northern GA this time.

This is probably the best shot at subzero temps in Chattanooga in my life. If we get the good snow cover shown on many of the globals, we have a real shot at it. I don't think it has happened since January 1985 (-10 and the all time record). I was born in 1988.

Trowal? Definitely some enhancement along I-75 there.

The NAM's tendency to over amp things may be contributing to the valley p-type issues. Arctic air push is also frequently under modeled. It's dense. It should spill right in. It could be right, but I'm not as worried since it is on an island right now.

Man I really don't know what to think down here. The globals are all game on. The short range models do not like this entire corner of the state.

Oddly, you might actually be better off in a hotel in Knoxville for this one. It's a strange storm.

Historically, MRX considers Hamilton county to mean Chattanooga. They won't issue advisories or warnings if the event only affects Lookout and Signal mountains for example. I don't see them doing anything differently this time.

They would be foolish to leave out Meigs and Rhea at this point. That just leaves the southern border counties. I wish I could say I've never seen that before, but sadly I have.