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Wintry Machine Learning Mauler 1/30-2/1

Best guess: the GFS trends worse, the euro trends better, they meet somewhere near the AIFS. Wouldn’t be surprised to see the AIFS go a hair back west as we get closer and we settle on a really good event for most everyone. Those 2-3ft runs were pretty to look at but most reasonable estimate is 4-8” in the western carolinas and probably a swath of 6-12”+ amounts in a couple of bands that no one has a clue where it’ll setup
Agreed. Let’s be honest, we know there isn’t gonna be widespread 2-4 foot totals in central and eastern NC. Still a lot of potential for a widespread big dog
 
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Literally everything we normally have going against us is for us this go around. all we need is moisture.

It’s all about that 50/50 low. If it moves on out we’re going to get absolutely creamed. That’s what goofus has as the different variable.


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Keep digging West come on... Trying to recall the December 2010 Christmas storm here's a good writeup


Basically the CMC/NAM/GFS have shown some of this if all parts of GA want measurable snow can't be too dependent on the ULL throwing it back especially the further west you go you hope for the initially build up of a wave of moisture as it start coming down right before it swings
 
Keep digging West come on... Trying to recall the December 2010 Christmas storm here's a good writeup


Basically the CMC/NAM/GFS have shown some of this if all parts of GA want measurable snow can't be too dependent on the ULL throwing it back especially the further west you go you hope for the initially build up of a wave of moisture as it start coming down right before it swings
Funny enough, both you and Jimmy have mentioned these 2010 and 2018 storms as having some similar characteristics for this setup. It snowed in Sav in both those years but not during either of the specific storms you both mentioned. Kind of speaks to how this might end up being one of these once in a 7-8 year winter with the current pattern in place.
 
Watch 540 and 546dm in Canada, notice how they are farther E when the Canadian was going south and bombing but have relaxed so the system has leaked E, need more thumb ridge
View attachment 190085
Fascinating to me how just a couple degrees of tilt in a system can create huge changes down the road. For last week, it was the difference between a raging snowstorm and getting an icy mess. This storm is no different, but ironically a little tilt in the back of that trough, just like last week, will be the difference between a few flurries and getting molly-walloped! We should not be surprised the models are having difficulty.
 
Still feel good that the ULL produces for a lot of people west of I95 and probably overperforms towards the upstate and I77 crew. It does appear to be locking in on that aspect. I think the coastal is still the biggest in question aspect here. The good thing is 9/10x whatever is happening in the day 3-5 range typically flips on it's head so maybe it trends NW in a day or 2 for the eastern folks.
 
Fascinating to me how just a couple degrees of tilt in a system can create huge changes down the road. For last week, it was the difference between a raging snowstorm and getting an icy mess. This storm is no different, but ironically a little tilt in the back of that trough, just like last week, will be the difference between a few flurries and getting molly-walloped! We should not be surprised the models are having difficulty.
Yep it makes it hard to give up on these until 24 hours or so before showtime when its likely more evident that its not going to happen
 
Here's the 12z Canadian Ensembles
1770022800-fcm9I6pWLQY.png
 
Wednesday IMO will be a huge day in terms of modeling. The most volatile piece, the TPV, will be sampled, and should provide clarity regarding the final solution. The model outputs matter right now, but I wouldn't get too hung up on any trend/solution until tomorrow.
 
Yep. Probably time to shift focus. This can still be a better than good snow event as it stands. ULL hard to nail down and often gets beefy right up into go-time. We’ll be fine
Not over here
 
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