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Wintry Jan 2-4 2022 Winter Weather Event/Obs

I think many including myself will like the new Euro
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Just out of curiosity, is there some scientific formula or something out there that deals with how much snow it takes to cool down ground temps before it starts to stick? I just find it hard to believe that 6 inches would be enough to cause travel issues with ground temps so warm. Not saying your wrong by any means, I am hoping it happens. But I have my doubts.
Travel conditions would be more from wet roads/bridges freezing from the melting. I guess the best way to explain it is that if rates are heavy enough to accumulate, you would have slow melting underneath, while the elevated accumulation helps insulate the heat to the surface. It would have to be fast rates, and a good cold push afterwards, but we have seen this a few times in the past. The travel issues are temporary…..almost as temporary as the accumulated snow…lol, but fun nonetheless!
 
18z was actually better for us west folks
It was
man this setup really interests me with that comma head/deformation zone, shows up nicely on the euro, that’s what I’m banking on here and what many should watch, with a strengthening and formidable 1000/999mb mid latitude cyclone View attachment 100839View attachment 100840View attachment 100838View attachment 100841View attachment 100842

Lol the snow is gonna be like cement, gonna be hard to accumulate, those ratios suck

10 to 11 tonight, a two inch band in one hour from huntsville to birmingham
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That gonna move through the shoals
Nice hit for the midsouth on 14z HRRR
Upper level low already taking shape just to my west. Temp is still 41 so it needs to start dropping.
What's your temp now?Like to see your observations being that you are just west of me!
 
Obs out west is going to tell the story. So many times I remember these things digging further south and getting too amped early on and destroying MS and northwest AL and then cutting way too soon. That’s not happening at the moment, so hopefully that bodes well for us to the East. Really want to see those temps push south and precip to start building in MS. If the snow reports start in west AL, those of us East of 65 should be sitting pretty.
 
Obs out west is going to tell the story. So many times I remember these things digging further south and getting too amped early on and destroying MS and northwest AL and then cutting way too soon. That’s not happening at the moment, so hopefully that bodes well for us to the East. Really want to see those temps push south and precip to start building in MS. If the snow reports start in west AL, those of us East of 65 should be sitting pretty.

I agree with this. Need to see those to the west of us overperform this evening.
 
Honestly as fun as looking at the models are, I would take whatever the models are showing and cut the totals by 3/4 across AL except for the northern parts and the NE ridges. If you get more be surprised.
Yeah it’ll be fun to see the observations actually come thru for y’all out west so we can gage how things will probably go up our way
 
Those HRRr totals for west Tennessee aren't going to verify the heaviest precipitation is currently over those locations and pushing east


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Gonna fill back in I would imagine briefly, chuck


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Soil temps are overrated, besides grass and leaves cool down much faster than the soil. The big issue here is with this type of “comma” head band is that the models often miss how quickly it moves through.
Energy transfer is usually brutal, but our digging is a little further East this time. I think north GA deals with the transfer this time.
 
Update from Greg Fishel.

SUNDAY AFTERNOON UPDATE

Well, I still think we'll see snowflakes in the Triangle during the day tomorrow, but I'm afraid the chance of seeing accumulating snow is dwindling. The radiosonde (weather balloon) data that came in this morning had an impact on both the US and European models, in that the track of the developing low pressure area in Georgia has shifted ever so slightly to the north and west. That means a warmer environment when the most intense upward motion occurs, which in turn implies rain. Much colder air will begin to pour in on strong northerly winds after 7am, but in order to get accumulating snow, we need strong vertical motion and cold air simultaneously, and that may very well turn out to be the missing tandem for snow lovers.

Now, there have been times where we see one anomalous set of model runs shift away from the original solution, only to return to that original solution 12 hours later. So, I will be plotting maps hourly, starting this evening, to make sure this system is "behaving" itself! Even with this shift, my good friends in Roxboro stand the best chance of seeing a Winter Wonderland tomorrow am.

Many of asked me over the years as to why the best chance of snow always appears to be northwest of Raleigh. Well, it's not quite this simple, but this time of year, the ocean water temperatures are usually warmer than the air inland. That warm ocean water warms the air above it, and anytime there is any component of the wind coming from the east, that milder ocean air begins to have an impact. The closer you are to the coast, the greater the impact, and the farther away, the lesser the impact. Roxboro just happens on average to be just far enough away from the coast to escape that warming influence.

A note to snow lovers: Never, ever, give up!!! I've always tried to shoot straight with you. I try to forecast what I think will happen, not what I want to happen. And sometimes, that's very challenging! More later!
 
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