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Extreme Cold, Snow & Sleet: SECS 1/24 - 1/26


TriPol
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1 minute ago, cleetussnow said:

I got just about 6 ,maybe a tad under.  I grabbed my electric leaf blower and easily blew off my walkway and vehicles. Very light snow and accumulating very quickly.  New GFS says between 16 and 17 total after tomorrow’s remnants.  We will see some sleet, compensated by ratios perhaps.  Good developments.  
 

image.thumb.png.5235f0a1428de2ffb0902f7b41bdb962.png

GFS picking up on the warm tonge. Would be a foot for CPK with what has already fallen.

image.thumb.png.f8dcc606a9c27ee2d32fbd7295a24990.png

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1 minute ago, jm1220 said:

Sleet will accumulate too just at a slower rate. If we get 0.6” liquid as sleet that’s 1.8” since it’s a 3-1 ratio. And it will be dense and heavy as hell. 

Yeah the snow pack would last a long time with that density.

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Just now, jm1220 said:

Sleet will accumulate too just at a slower rate. If we get 0.6” liquid as sleet that’s 1.8” since it’s a 3-1 ratio. And it will be dense and heavy as hell. 

There is also IP (PL) and SN mix at 5:1 or 7:1 pending on the mix which may occur in the borterline areas.

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8 minutes ago, cleetussnow said:

I got just about 6 ,maybe a tad under.  I grabbed my electric leaf blower and easily blew off my walkway and vehicles. Very fluffy dry snow and accumulating very quickly.  New GFS says between 16 and 17 total after tomorrow’s remnants.  We will see some sleet, compensated by ratios perhaps.  Good developments.  
 

image.thumb.png.5235f0a1428de2ffb0902f7b41bdb962.png

 

6 minutes ago, EastonSN+ said:

GFS picking up on the warm tonge. Would be a foot for CPK with what has already fallen.

image.thumb.png.f8dcc606a9c27ee2d32fbd7295a24990.png

How are these so different, if both same gfs? Shouldn't Kuchera be higher also? 

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1 minute ago, eduggs said:

I'm seeing 18"+ for parts of the mid-HV across to CT on the latest guidance... maybe down to Orange & Putnam... especially if measuring with a snowboard every 6 hours.

I wouldn’t be shocked if that creeped down into Northern Westchester. Between 5-6” already and the big boy rates haven’t even come yet 

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Just now, mikem81 said:

Sleet line looks to he moving quickly again.

anyone able to confirm if flipped in philly already? We need to watch philly then trenton 195 area and see how quick warm air aloft is moving 

Newest HRRR continues to have the sleet line fight back and forth as it gets to NYC around 21z. Sleet finally really takes over around dark. If that's true could be big, and NYC gets over a foot. 

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1 minute ago, mikem81 said:

Sleet line looks to he moving quickly again.

anyone able to confirm if flipped in philly already? We need to watch philly then trenton 195 area and see how quick warm air aloft is moving 

Quickly?? It’s barely into southern jersey. Wildwood is still snowing heavy! 

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1 minute ago, mikem81 said:

Sleet line looks to he moving quickly again.

anyone able to confirm if flipped in philly already? We need to watch philly then trenton 195 area and see how quick warm air aloft is moving 

There is a precip hole over south Jersey so the lighter rates probably allowed it to move in if I had to guess but I’m no pro

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The way things are looking we’re not even looking at that, I’m saying 3 to 5 in the city, less than that point south and east and even 30 miles west and north of New York City not that much more maybe 4 to 8 at best

How's this working out for ya?


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2 minutes ago, mikem81 said:

Sleet line looks to he moving quickly again.

anyone able to confirm if flipped in philly already? We need to watch philly then trenton 195 area and see how quick warm air aloft is moving 

It usually moves in waves. Advances north, gets beaten back a bit, then surges north quicker and further north. 

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Just now, allgame830 said:

Quickly?? It’s barely into southern jersey. Wildwood is still snowing heavy! 

Maybe I’m looking at wrong map on COD but it seems to be advancing on the Philly radar using the sleet correlation mode 

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3 minutes ago, allgame830 said:

I wouldn’t be shocked if that creeped down into Northern Westchester. Between 5-6” already and the big boy rates haven’t even come yet 

These are the big boy rates right now. There might be higher QPF hours coming, but probably not higher snow/hr. 

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58 minutes ago, RU848789 said:
As of 10:30 am, snowing legitimately heavily (1/4 mile visibility) with a bit larger dendrites and we now have 5.2" otg (1.2" last hour) at 13F (10F dewpoint). Just went for a Jeb Walk and took a few pics - gorgeous out there.
 
May be an image of fog, arctic and tree

As of 11 am, still snowing heavily and up to 6.0" of snow otg, for a rate of 1.6"/hr the last 30 minutes - wow!  13F and just pouring snow.  Sleet line looks to be in Wilmington - latest HRRR has us in snow until about 3 pm and if that verifies, we'd get another 6" or so before the sleet.  We'll see, but certainly seems like 9-10" is a lock before the change and then maybe 1-2" sleet (but likely mixed with some snow, so maybe higher ratios than 3:1 for pure sleet).

Also, I got my snow to liquid ratio for the snow that fell through about 9:00 am when we had about 3.6" of snow - it was 14:1. I thought it would be at least 15:1, so off on that guess a little bit, probably because the flakes the first few hours were not large dendrites, so even though they were smaller dendrites and very dry, they packed in more than expected. Did this by taking a 6" x 6" x 3.6" cube of snow and melting it and doing the volume ratio. 

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