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January 28/29 Blizzard Observations/Discussion/Nowcasting


Northof78
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27 minutes ago, RU848789 said:

As of 9 pm, we only picked up another 1/8" since 8:30 pm, as the snow let up, meaning we have 5/8". However, the radar is looking great and intensity just picked up and it's coming down nicely. Also, so far the snow that's falling is easily 15-20:1 snow to liquid, with very nicely formed dendrites making a nice fluffy snow. Not sure how long that will last, but if we can retain this kind of crystal growth in the DGZ once the precip gets heavier, we could pile up some snow quickly during the first half of the night - one of the pros on another board said he thought we'd retain good snow growth through the first half of the storm. Down to 30F.

As of about 9:35, we're up to 1".  Coming down close to moderately at 30F. Didn't expect to have an inch until 11-12, so feels like we're ahead of schedule.

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3 minutes ago, kat5hurricane said:

Been a steady light snow for most of the evening but has noticeably picked up in the last hour. Just took the dog for a walk and I'd say about 1.5 inches with moderate snow. Didn't expect this so soon, it just has the feel of an overperformer.

We're neighbors I'm here in Flushing. Def coming down pretty nicely with about 1.5 inches as well.

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1 minute ago, JohnnyDop said:

Holy convection as it stregthens right now over the Gulf Stream. Few hours ago there were only 5 lightning strikes. Nies there 5 per minute. 

8A0CF926-8CA4-4A8F-8B21-9AC68ADE7B18.jpeg

That’s what we don’t want. We want that convection to be weaker. That might be the mechanism to string out the low and drag it east. But the short range models are in good shape so hopefully not. 

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2 minutes ago, JohnnyDop said:

Holy convection as it stregthens right now over the Gulf Stream. Few hours ago there were only 5 lightning strikes. Nies there 5 per minute. 

8A0CF926-8CA4-4A8F-8B21-9AC68ADE7B18.jpeg

Was hoping for days this would end up tucked closer to the Outer Banks at this stage. Didn't happen. Well modeled all along as an offshore low. Still could be a really good one for many.

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6 minutes ago, HVSnowLover said:

Snowing light to moderate but ratios already seem very good as expected, probably close to an inch already. 

No no, haven't you heard... there's no such thing as ratios. Snow only falls at 10-1 NO MATTER WHAT.

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Just now, HVSnowLover said:

I think people have said the winds would cut ratios which is a reasonable thing but no real wind at the front end of the storm.  

I know, but the comments every time somebody mentions ratios or posts a Kuchera map is ridiculous. Not the same type of storm at all but La Guardia got 9 inches of snow on .3 QPF earlier this month. ratios are a THING.

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Couple more shots before I try to catch some sleep, looking really good here in inland Toms River. The flakes are finally fattening up and away from the pixie dust. Really piling up now with steady moderate snow @ 31*.

r5rriDT.jpeg

My snow projector signaling to the heavens where to park the white gold. Seems to be working. 

 

c8mzarb.jpeg

Beautiful. 

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2 minutes ago, Jt17 said:

I know, but the comments every time somebody mentions ratios or posts a Kuchera map is ridiculous. Not the same type of storm at all but La Guardia got 9 inches of snow on .3 QPF earlier this month. ratios are a THING.

I’ll say that if the 40-50+ mph winds don’t happen tomorrow or in the meat if the storm then ratios might work out. Lift looks good in the temp layer (-12 to -18C) for a while for most of us where dendrites would form. But the 970 or under MB low expected will generate much stronger winds by the morning and would ruin it by breaking the flakes up. Ratios are about the temp where the flakes are made in the cloud and those flakes making it to the ground. I’ve been in 10 degrees before in a bunch of 10-1 ratio at best sand flakes because of poor growth. Not saying it’ll happen here but you can’t just take it’ll be cold and it’s snowing for big ratios. 

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1 minute ago, jm1220 said:

I’ll say that if the 40-50+ mph winds don’t happen tomorrow or in the meat if the storm then ratios might work out. Lift looks good in the temp layer (-12 to -18C) for a while for most of us where dendrites would form. But the 970 or under MB low expected will generate much stronger winds by the morning and would ruin it by breaking the flakes up. Ratios are about the temp where the flakes are made in the cloud and those flakes making it to the ground. I’ve been in 10 degrees before in a bunch of 10-1 ratio at best sand flakes because of poor growth. Not saying it’ll happen here but you can’t just take it’ll be cold and it’s snowing for big ratios. 

I understand that, but most of this forum is focused on the immediate area around NYC and that will be far enough from strong winds for most of this storm that it shouldn't really have an impact on snow growth. Which is why the outer extent of the moderate/heavy snow actually could reflect the Kuchera snow totals. Just a hunch here.

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3 minutes ago, HVSnowLover said:

I think its interesting that the short range models (RAP, HRRR) have significantly more qpf than the other models. I am not sure if this is normal. 

One doesn't even have to look at the hrrr to see the moisture pumping off the atlantic. Above average sst's have alot to do with that. These bands are sharpening up as they come off the ocean also as everything gets its act together.

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1 minute ago, Wetbulbs88 said:

I am but I’m from Harlem. Just looking at radar, looks like 2-4”

2-4" inches for the whole storm? lol You actually came here to troll. What a boring place to troll man. It's a bunch of weather nerds. 

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4 minutes ago, HVSnowLover said:

I think its interesting that the short range models (RAP, HRRR) have significantly more qpf than the other models. I am not sure if this is normal. 

We're in their respective time frame of usefulness but who knows if they're going to be accurate considering how chaotic the modeling has been.

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