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Epic winter signal continues to beam, part II


Typhoon Tip

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Its going to be just about impossible for anyone not along the immediate shore line to go to rain in this over SNE...when the GFS only brings the sfc frz line to PVD, you know its cold air mass. That model is awful with CAD and even its cruddy resolution is seeing it on this setup.

The only way anyone outside of the south coast or Cape goes to rain is if this low rips up into central NY and the triple point low is late to the party...but given this airmass with that high position and the deep snow pack all the way to the ocean, I don't see it happening.

right yeah that makes sense. I noticed that even though there was a bit more nosing of warm air in the mid levels on this run...the high and the confluence is even more ideal to keep areas further south below freezing at the surface. You can see the CAD even more over New England on the latest run...must be impressive to show up on a global model.

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kevin better hope the low level cold is deep enough for sleet at his place...

Looking at the HFD sounding verbatim, he would probably be pelting at his house further NE toward the cold air source as HFD is a cold ZR, not too far from sleet. BDL north of HFD actually looks like a lot more sleet. I was looking at ORH sounding and its nearly all snow...does get some sleet for a period....but man, what a gradient in the level/depth of that cold air. The gradient is so tight that I was thinking about how being 3-4 miles N of the airport latitude might actually matter in this. :lol:

Of course this is all speculation...I wouldn't be surprised if these gradients setup 30 miles north or south.

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Looking at the HFD sounding verbatim, he would probably be pelting at his house further NE toward the cold air source as HFD is a cold ZR, not too far from sleet. BDL north of HFD actually looks like a lot more sleet. I was looking at ORH sounding and its nearly all snow...does get some sleet for a period....but man, what a gradient in the level/depth of that cold air. The gradient is so tight that I was thinking about how being 3-4 miles N of the airport latitude might actually matter in this. :lol:

Of course this is all speculation...I wouldn't be surprised if these gradients setup 30 miles north or south.

These sw flow events are pretty fascinating. It could just be a few miles between good snow and disaster. If you're a tick north of the main gradient maybe you get mostly snow with a period of pingers. If you are a tick south of the gradient you get snow to sleet but perhaps more in the way of fzra...ie...maybe the "mainly sleet" corridor will be narrow?

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you guys see srefs? 1.25+ for all, 1.5+ for many. perhaps a bit more to come for easties

Yea.. really juicy. Get ready For a 2 day 12-24" snowbomb Mahk! What do You have on the ground.. there's still about 15-20" here. Could be looking at 40" by storms end..

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Yea.. really juicy. Get ready For a 2 day 12-24" snowbomb Mahk! What do You have on the ground.. there's still about 15-20" here. Could be looking at 40" by storms end..

dunno how much it has shrunk in the last couple days, but 20 at least I think. Reassuring sound of ice dams being removed from my roof. Got a guy over here this morning....and he's coming back Thursday to get the new snow off.

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The GFS has a mega snow gradient..lol Almost 20" near the NH border to 6" near BOS. Probably underdone in BOS, but still...huge gradient sets up just nw of the city.

Yeah it will probably under do snowfall in the zone that is just barely N of the sleet line as any layer close to 0C (even if still under it) will reduce snowfall quickly in the algorithms.

I think the tough part is trying to figure out where this gradient sets up. The arctic high and cold air source is so impressive...more impressive than in 12/16/07 (which was pretty impressive)....but the juiced system to our southwest is also pretty potent...so opposing forces battling it out.

My gut tells me this ends up on the snowier side of guidance for a BOS-ORH line...and then working the gradient south from there.

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Yeah it will probably under do snowfall in the zone that is just barely N of the sleet line as any layer close to 0C (even if still under it) will reduce snowfall quickly in the algorithms.

I think the tough part is trying to figure out where this gradient sets up. The arctic high and cold air source is so impressive...more impressive than in 12/16/07 (which was pretty impressive)....but the juiced system to our southwest is also pretty potent...so opposing forces battling it out.

My gut tells me this ends up on the snowier side of guidance for a BOS-ORH line...and then working the gradient south from there.

I agree with that. If I was in BOS or ORH I'd feel pretty good. Tolland and Bradley could luck out if things tick a hair colder but I think I'm pretty much out of an all or mainly snow threat. Is it wrong to want 1" of ZR after 2-4" of snow on Tuesday?

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These sw flow events are pretty fascinating. It could just be a few miles between good snow and disaster. If you're a tick north of the main gradient maybe you get mostly snow with a period of pingers. If you are a tick south of the gradient you get snow to sleet but perhaps more in the way of fzra...ie...maybe the "mainly sleet" corridor will be narrow?

Yeah it probably will be given the gradient in the MLs. You could go from what you described as mostly snow with some minor sleet contamination to a full blown ice storm (after initial light snows) within 30 miles or so.

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I agree with that. If I was in BOS or ORH I'd feel pretty good. Tolland and Bradley could luck out if things tick a hair colder but I think I'm pretty much out of an all or mainly snow threat. Is it wrong to want 1" of ZR after 2-4" of snow on Tuesday?

Nah. Id rather have a nice layer of zr then rain. It might be pretty cool to have zr on top of 2'-3' of snow.

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