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Ostrich December

One set of 18z runs is not a reason to give up on a storm. That is beyond pessimistic. You need to have it go in the wrong direction at least 3-4 runs in a row to start throwing this one away
Right, but the overall synoptic setup really isn’t very supportive of a storm, really not a awesome H5 setup, and really not a great push of cold. I think the best we see is a ZR chance for the mountains. We would need to see huge shifts, and we haven’t seen that lately especially since we’re at a point where the storm is on land, and getting worse.
 
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Looks like a lot more ice to rain to me, vs the snow/sleet they were showing earlier, honestly it wouldn’t shock me if areas around 85/north pick up some freezing rain, then we switch over to rain, something similar to that one November 2019 setup
 

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Over land or not we know a lot can change in 5 days. We are still in the game. ?
 
I can’t remember the last time (if) we got a surprise where we went from modeled rain to snow. I think that every single surprise went from a little snow, to a lot of snow. January 2000, 2018, December 2010 for example. I wouldn’t hold my breath on this one if we’re routing for a southern trend.
 
I can’t remember the last time (if) we got a surprise where we went from modeled rain to snow. I think that every single surprise went from a little snow, to a lot of snow. January 2000, 2018, December 2010 for example. I wouldn’t hold my breath on this one if we’re routing for a southern trend.
Oh yeah for sure. Once it trends rain it doesn't trend back

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I can’t remember the last time (if) we got a surprise where we went from modeled rain to snow. I think that every single surprise went from a little snow, to a lot of snow. January 2000, 2018, December 2010 for example. I wouldn’t hold my breath on this one if we’re routing for a southern trend.
I think jan 2016 several models had rain/freezing rain but it ended up trending colder and had more IP instead
 
I think jan 2016 several models had rain/freezing rain but it ended up trending colder and had more IP instead
CAD generally trends colder. Especially when it comes to Ice. One thing I’m noticing is models trying to run out LP into the CAD and that just isn’t going to happen. Seen that happen too many times just for it to trend back to more ice from 72 hrs in
 
I think jan 2016 several models had rain/freezing rain but it ended up trending colder and had more IP instead
Yeah, but that happens with most every major Miller B setup. ZR is always way over modeled, and ends up being mostly sleet. December 2018 did that, and I think February 2014 did as well. Altogether in those setups, they had a very decent shot of winter precip. I just feel like we’re teetering between ZR and Rain.
 
CAD generally trends colder. Especially when it comes to Ice. One thing I’m noticing is models trying to run out LP into the CAD and that just isn’t going to happen. Seen that happen too many times just for it to trend back to more ice from 72 hrs in
Yeah the LP is going to travel the path of least resistance and that isn’t right up in the middle of cold air.
 
I think jan 2016 several models had rain/freezing rain but it ended up trending colder and had more IP instead
You are correct. In fact until within 36 hours out, CLT was expected to get predominantly rain, but the NAM really caught on to the strength of the wedge and the colder thermals the day before and the metro area ended up with a major sleet storm
 
Yeah the LP is going to travel the path of least resistance and that isn’t right up in the middle of cold air.
Most likely scenario is the LP is going to move around the CAD and transition to the coast. The lows never make it above I20 before they transition. Now I will say if you’re expecting snow, that’s just likely not going to happen. The Euro from today’s 12z run had 850’s running around 43 degrees but did have 925s slightly below freezing so you could see some sleet but ZR is likely what we are going to see. Precip isn’t very heavy either but a good .6 - .9 looks possible which could really create some issues.
 
You are correct. In fact until within 36 hours out, CLT was expected to get predominantly rain, but the NAM really caught on to the strength of the wedge and the colder thermals the day before and the metro area ended up with a major sleet storm
I don't think I've ever experienced a total sleet storm with nothing else... I think it would be cool
 
Van Denton posted it nicely, the odds shifted down 2% from yesterday based on the mean of ensembles for areas near the Greensboro NC airport. I highly recommend reading his Facebook post and how he calculates percentages each day. Looks like ice but it never takes much to drop the snow out of Virginia into western North Carolina when the cad continues to strengthen every run. We simply don’t know. After today tho, a few of us need to quit cliff diving after each set of runs thinking it’s a trend.
 
I don’t think anyone should’ve been expecting snow from this regardless. Freezing rain and sleet and mostly freezing rain was always going to be the likely scenario and that is still very much in play.
Especially for central NC. You had maybe a few ensemble members here or there showing some sleet but that's about it. This really is only a snow threat for the mountains. Still could be interesting though!
 
I don't think I've ever experienced a total sleet storm with nothing else... I think it would be cool
That January 2016 had just a little bit of ZR with it... just enough to make nearly 3 inches of sleet on the ground a rock hard glacier... the kids had some really good sledding in that one
 
Ruh roh, and normally the icon is warm by a few degrees View attachment 57135
I’ve seen where it’s stated the ICOn can run 4-7 degrees too warm generally and globals are awful with the depth of CAD and the strength of it so it wouldn’t be at all out the possibility to see the Piedmont and Upstate running around 29-33 degrees here.
 
Keep in mind that to get a real ice storm, you need to have upper 20’s. These ice setups are usually overestimated/overhyped, when we have temps at freezing. There’s the stronger CAD argument, but there really isn’t any point in getting hyped, unless we get something considerable into the NAM range.
 
32 degree ZR = tree ice event
And these models already have us at 33-35 degrees right now. It would likely be running 29-31 as of today. CAD always trends colder so upper 20’s is a real possibility here. Like I said earlier, another thing that overhypes the ZR is we get these 2-3 inch events that the models show as all ZR. This is going to be a much lighter falling precip with the storm goal around 3/4 quarters of an inch of liquid that would be falling more like a shower. That can really help with the accrual of ice.
 
I live on the east facing slopes of the blue ridge it takes alot for an ice storm I will say that seen a many. My chainsaw has the scars to prove it you really need temps below 32° to get any serious accumulation. I highly doubt this system produces much unless your on up the road toward Virginia.
 
Keep in mind that to get a real ice storm, you need to have upper 20’s. These ice setups are usually overestimated/overhyped, when we have temps at freezing. There’s the stronger CAD argument, but there really isn’t any point in getting hyped, unless we get something considerable into the NAM range.
I’ve always thought that as well, but I did a little bit of research and found that during the infamous 1973 Atlanta Ice Storm, temperatures stayed in 30-32 degree range throughout. Heck even IMBY during the January 2017 winter storm, I saw over a 1/4 inch of ice accrual with a temperature of 31-32.
 
And these models already have us at 33-35 degrees right now. It would likely be running 29-31 as of today. CAD always trends colder so upper 20’s is a real possibility here. Like I said earlier, another thing that overhypes the ZR is we get these 2-3 inch events that the models show as all ZR. This is going to be a much lighter falling precip with the storm goal around 3/4 quarters of an inch of liquid that would be falling more like a shower. That can really help with the accrual of ice.
I would dial it back. Ignore the Icon warm bias, because most other models agree with it just barely being into freezing north of I-85. Not a real good push of cold air to get an ice storm IMO. I’ve been burned so many times being around 32-33 degrees while the CMC says I get .50 inches of ice. If anybody gets anything outside of maybe a light coating, it’ll be maybe Winston-Salem northwestward. There’s the potential CAD trend, but don’t count on that happening, because it’s easy to get too excited. I have an extremely hard time seeing up in the upper 20’s, it’s just not that strong of climo setup. I could be wrong though.
 
I’ve always thought that as well, but I did a little bit of research and found that during the infamous 1973 Atlanta Ice Storm, temperatures stayed in 30-32 degree range throughout. Heck even IMBY during the January 2017 winter storm, I saw over a 1/4 inch of ice accrual with a temperature of 31-32.
True, but those highs were just locked in place and just didn’t go away. This is a receding high, so temps are going to warm up.
 
I would dial it back. Ignore the Icon warm bias, because most other models agree with it just barely being into freezing north of I-85. Not a real good push of cold air to get an ice storm IMO. I’ve been burned so many times being around 32-33 degrees while the CMC says I get .50 inches of ice. If anybody gets anything outside of maybe a light coating, it’ll be maybe Winston-Salem northwestward. There’s the potential CAD trend, but don’t count on that happening, because it’s easy to get too excited. I have an extremely hard time seeing up in the upper 20’s, it’s just not that strong of climo setup. I could be wrong though.
And I’ve seen these models consistently under perform CAD here all my life. I’ve seen them try to drive LP directly into CAD and that just isn’t going to happen. It never does. CAD always over performs, always gets colder the closer you get to show time, and for the globals to be that close to freezing already tells me an ice storm is looking more and more likely. On top of that you only get those ridiculous ice totals from models showing every bit of liquid being freezing rain. No matter if it’s falling very heavy. That’s not the setup here. You’re dealing with lighter precip that lasts over a longer period of time, if it’s as modeled. Now I’m not saying an inch of ice but .25-.5 certainly couldn’t be ruled out.
 
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