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12/30 Coastal - Snowing Our Way Into NYE


Clinch Leatherwood

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i got one inch from 11-7-12 4 inches from the last storm, 13-14 inches from the october storm. i have 5.25 inches for the season. there were some reports of up to 2.5 inches on 11-7 but i can tell you truthfully where i am there was just about an inch.

Well better than us folks here. 1.9" in all of those combined here.

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RGEM is a pretty big hit for most areas...esp east of CT river though even W of river down in CT does pretty well. 0.5"+ for most and more of SE areas. Looks like PYM to TAN would get 0.8-1.0"...Cape has more but probably some BL issues.

RGEM is often too wet, but even taking 2/3rds of these numbers would be a warning criteria event for eastern areas.

Does the good QPF extend further south/west near NYC?

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Some of us sickos can usually tell pretty quick if they are dendrites...though if the dendrites aren't hooked together, sometimes its tougher to tell without closely inspecting because they are small. But usually they are hooked together nicely so its usually those dime sized great looking flakes.

But yeah, its definitely a technically incorrect phrase to say "dendrites are terrible"...usually that means there aren't any dendrites, lol. Probably ugly needles or plates. We should train everyone to say "dendritic growth is terrible" instead.

Well you have different kinds of dendritic formations too...stellar, spatial... I've also seen those clumps fall as primarily sectored plates or mixed crystals that are only about 50% dendritic. I'm more referring to the non-mets that say things like "these dendrites suck" or "huge dendrites right now".

I don't expect weenies to get out there with a magnifying glass to investigate every crystal. I did that back in the day when I was working with an avalanche forecaster. Some of those charts on snowcrystals.com do a pretty good job at tell you what you should expect given temps aloft. Anyways, back to the storm.

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RGEM is a pretty big hit for most areas...esp east of CT river though even W of river down in CT does pretty well. 0.5"+ for most and more of SE areas. Looks like PYM to TAN would get 0.8-1.0"...Cape has more but probably some BL issues.

RGEM is often too wet, but even taking 2/3rds of these numbers would be a warning criteria event for eastern areas.

That would be pretty good even up here

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Again, you have to look at the details. You want good omega/lift in the -12C to -18C layer. That is the max dendritic growth zone. If the lift is weak or is outside of that layer, then you get smaller crystals with different habits. Again, I haven't looked at BUFKIT yet.

There is also a tendency for a lot of people to call every flake they see a dendrite when the truth is most of the crystals I analyze aren't even of that habit. There's all kinds of regular/irregular crystal formations...i.e. needles, plates, sectored plates, columns, bullets, etc. You really can't tell for sure if it is a dendrite or not from the comfort of your warm living room.

/rant :)

I don't like to enjoy a storm from my warm living room. I like to be out in it. Perhaps next storm I should let some snow fall on my dark coat, take a close up photo and we can look at what it is! I just like the stuff that makes for a firm base the first part of the storm and then the high ratio fluff for the second half....that piles up real high.

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