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Pattern December Dud đź‘€

Long range of the last 4 runs of the Euro AI show poleward amplification up thru Alaska. These looks aren't even cold for us (at least initially), but I find them to be mildly interesting because I felt the AI did a good job at sniffing out our current cold pattern

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Should help build up cold air in the source region.
 
Haven't seen these in person before. Pretty neat. Not the most perfectly formed example, but it's still pretty cool to see them over top of several peaks in West Jefferson this morning.

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If you want to see blue skies just come to my house. It’s sunny 334 days a year.
 
Haven't seen these in person before. Pretty neat. Not the most perfectly formed example, but it's still pretty cool to see them over top of several peaks in West Jefferson this morning.

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You can get some really really solid stacks over the Black Mtns. Distant in this pic but in the center had some decent stacks over thereIMG_7234.jpeg
 
GFS brought a big ol dry CAD into the mix next weekend. Not super cold, but could get a cloudy 40s day out of it.
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Thats been showing on Euro an Can for several days. In fact some runs show HP parked up there for multiple days , keeping us in a NE wind. No moisture, but it prevents another big warmup after the cool down late this week rockets out after 48 hrs. We will lose it after 3 or so days, cause a lakes low comes and scoots it out.
 
The mid to late month pattern is the worst one you could ask for. Cold rain purgatory.

Yeah it’s not a torch but it’s definitely not going to be cold enough to snow as there’s no “true” cold air in sight & it’ll take a week-10 days or so for real cold to come back, even as the pattern flips back after Christmas.

0/10 for me
 
Another reason why you shouldn’t rush pattern changes.

Even when the circulation pattern flips after this mild spell, it simply takes a lot of time for the deep layer air mass to catch up. You first have to transport the cold air here, then you have to get it to stay, by rebuilding the snow pack you lost in the previous mild spell as an example.

That doesn’t happen immediately most times, even though most like to tell themselves it can.

 
Another reason why you shouldn’t rush pattern changes.

Even when the circulation pattern flips after this mild spell, it simply takes a lot of time for the deep layer air mass to catch up. You first have to transport the cold air here, then you have to get it to stay, by rebuilding the snow pack you lost in the previous mild spell as an example.

That doesn’t happen immediately most times, even though most like to tell themselves it can.


One positive is its Dec 20th and not Jan 20th.
 
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