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Dec 15-18 Arctic Front/Snow Thump/Meltdown to the Border


HoarfrostHubb

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2 minutes ago, Typhoon Tip said:

heh... i think the 'reason' could be because as we near the event, it's maximizing the ability of these finer meshed model types to see those absurd sort of "meso" gradients - 

we've been discussing on one hand, the idea of the NAM and RGEM compression the thermal wall close to BOS in a secondary ageostrophic push late Saturday; well, it works the other direction too... not trying to be snippy but, we have to consider that with the high moving (still) pretty perfectly wrong for sustaining cold, the wind veering is going to initially push a strong marine yadda yadda yadda into the immediate coastal plain.  I bet when it's +5 C at BOS it's like -3 C at BED at some point on Saturday late morning...  

That's not really the reason though. The other versions show more QPF, where that one kind of keeps SE areas in light precip before the meat comes in. Once it does, it gets too warm. But hey, that could happen too. 

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4 minutes ago, CoastalWx said:

That's not really the reason though. The other versions show more QPF, where that one kind of keeps SE areas in light precip before the meat comes in. Once it does, it gets too warm. But hey, that could happen too. 

well... maybe i didn't fully get ur conversation there, but i thought there was consternation over why there was additionaly 'warm look' in the se zones. 

yeah, precip certainly would play a role, because of evaporation cooling feed-back on bl resistance and so forth, BUT, in principle, i'm not sure you can declare 'not the reason' like that for the nam seeing marine intrusion.   

 

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1 minute ago, Typhoon Tip said:

well... maybe i didn't fully get ur conversation there, but i thought there was consternation over why there was additionaly 'warm look' in the se zones. 

yeah, precip certainly would play a role, because of evaporation cooling feed-back on bl resistance and so forth, BUT, in principle, i'm not sure you can declare 'not the reason' like that for the nam seeing marine intrusion.   

 

The 3KM and 12KM had more QPF which I think led to less snow...but anyways it's probably gonna change. RGEM slightly warmer in SNE, but looks like a good thump still for BOS. It's is the coldest of guidance so not surprised it warms some..at least near BOS. Still has the cold tuck too. We all furnace late Saturday night.

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ha, it might have even been Kevin?  

i dunno, but someone mentioned ANA the other day - i just caught it in passing, but the idea was quickly buried and quietly tucked away.  this 12z NAM solution does erupt an ANA stripe... yes, BEHIND the primary boundary. in fact, i was inclined to check when the FRH grid popped off additional .3" liq equiv QPF with T1 thru T5 supporting cat's paws down in PHL!  ...

it may not be happen.  it may also be a coincidence... but, just sayn' the idea isn't without precedence here.  obviously it's not a big deal.  the geographical layout of said ANA ribbon is pretty dern narrow; i just thought it interesting to point out that it is there. 

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1 minute ago, J Paul Gordon said:

 Are they still expecting a big warm up on Sunday?

Seems like an 8-10 hour period mostly Sunday morning of 40's.. perhaps low 50's in spots. Front crashes thru midday so it's not prolonged , but it may be enough to wipe out most of it. 

It keeps Greenfield area near 32 the entire time so Chris keeps his pack and MPM should keep some 

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Just now, J Paul Gordon said:

Thought so. Any chance of it being shorter duration? As in, will we be able to hold onto anything from Saturday until temps drop on Sunday?

That depends on how much snow you receive, when the warm front comes through, and how long. My guess is in ORH..probably will hold onto some. I can't say if it's 1" or 4" though.

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looking at it ...it's classic (relative to the NAM's evolution that is..) 

it shows a primary boundary position that is along and/or off the ec at 60 hours, meanwhile...the trough-centric wind max(es) are all well back west over the cordillera and eastern Lakes...  that much jet velocty riding back west over the boundary could very well instantiate a restoring counter flow/up-glide over the top...  

interesting...

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4 minutes ago, Damage In Tolland said:

Seems like an 8-10 hour period mostly Sunday morning of 40's.. perhaps low 50's in spots. Front crashes thru midday so it's not prolonged , but it may be enough to wipe out most of it. 

It keeps Greenfield area near 32 the entire time so Chris keeps his pack and MPM should keep some 

Since we have several inches on the ground from Monday's 6", I'm pretty certain we'll have plenty of coverage when it cools down again on Sunday.  I'm not sure about Christmas, but I'd be shocked if there are any bare spots in the hinterlands.

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2 minutes ago, CoastalWx said:

That depends on how much snow you receive, when the warm front comes through, and how long. My guess is in ORH..probably will hold onto some. I can't say if it's 1" or 4" though.

Thanks, I'll keep my hopes suspended. In spite of my best efforts, I'm finding myself hoping for some white on the ground for the 25th... including hints of something toward the end of next week... Can't fight the culture! 

I really have to move to Caribou (and buy every bit of civilization I want on Amazon). Wife won't go, though.... hmmmm, maybe Skype?

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7 minutes ago, J Paul Gordon said:

Thanks, I'll keep my hopes suspended. In spite of my best efforts, I'm finding myself hoping for some white on the ground for the 25th... including hints of something toward the end of next week... Can't fight the culture! 

I really have to move to Caribou (and buy every bit of civilization I want on Amazon). Wife won't go, though.... hmmmm, maybe Skype?

Caribou is a nice town...not remote at all...has all the fast food restaurants and shops and grocery stores... nice town.  I don't think you'd find it that isolated.

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you guys should lay off on the wind 'backdraft' 

it's okay to be satirical/sarcastic a little, but carrying on about it sounds like "ignient" rabble honking like donkeys 

the wind warning was not unwarranted. the indicators were there. not every 'imminent threat in the atmosphere is realized - that's just the state of the art of the present era.  tornado warning more often means no tornado, but it does not follow to ridicule there, either.  

if they didn't do such a warning given the data, and 65 mph mixing became more common, the hypocrisy would know no bounds - 

let it go already.  christ.

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