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

[mikem81]

I would have thought the sleet line would slow given the location of the coastal in ideal spot, but guess the primary is hanging on as well...

 

[NorthShoreWx]

CC radar shows a mix line.  It's not a solid sleet front.  Parts of it advance and then wash out.  We could potentially hang on for another 3 or 4 hours here.  That might be enough to get us to a foot.

 

https://weather.cod.edu/satrad/nexrad/index.php?parms=OKX-N0C-1-12-100-usa-rad

 

[Nibor]

We’ve got to be close to 8 inches here. 

[EasternLI]

It's incredible out there. This has to be 2" an hour stuff right now. 1/8 mi vis or less

[psv88]

1 minute ago, NorthShoreWx said:

CC radar shows a mix line.  It's not a solid sleet front.  Parts of it advance and then wash out.  We could potentially hang on for another 3 or 4 hours here.  That might be enough to get us to a foot.

 

https://weather.cod.edu/satrad/nexrad/index.php?parms=OKX-N0C-1-12-100-usa-rad

 

A foot of pure snow, before a few inches of mix. 

[NorthShoreWx]

2 minutes ago, mikem81 said:

I would have thought the sleet line would slow given the location of the coastal in ideal spot, but guess the primary is hanging on as well...

 

Primary is too strong relative to the coastal low.  OTOH, that same map showed the primary in southern Indiana a couple of hours ago.  Not sure what to make of that. 

[RU848789]

1 hour ago, RU848789 said:

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. 

As of 12 pm, we had 7.0" of snow and it was snowing very heavily at 14F.  I then shoveled for the next hour and around 12:40 or so, some sleet mixed in, but it wasn't "classic" spherical pellets, it looked more like small rods that might've actually been poorly formed flakes - weird stuff.  Anyway, finished my 2nd shoveling (denser) around 1 pm and we now have about 8.3", but it's getting harder to tell as the winds have picked up considerably, blowing/drifting the snow, so I had to average a bunch of measurements (luckily there's old crusty snow underneath, so not measuring on the board isn't an issue like it is on grass).  Made a nice snow angel.  Definitely a mix of snow and sleet and it keeps oscillating on which one dominates.  And if you want to see downtown Metuchen, News12 is doing a remote from there.  

[NorthShoreWx]

8 minutes ago, psv88 said:

2” an hour rates now for Long Island. Incredible storm! Took the dog for a walk earlier and he loved it. 

Easily.  We did 1.5"/hour rates before the viz dropped to where it is now (about 1/8 mile).  Temp is up to 15.3° ...sun angle coming into play

 

[Dan76]

23 minutes ago, nycsnow said:

Don’t look now but sleet line retreating a bit. Every bit counts 

[nesussxwx1]

NAM looks pretty damn accurate with the mix line. Definitely wrong in other aspects, but nailed that one.

[psv88]

1 minute ago, nesussxwx1 said:

NAM looks pretty damn accurate with the mix line. Definitely wrong in other aspects, but nailed that one.

I will triple it’s snow forecast from last night 

[psv88]

This is the northern state parkway about 1/4 from my house. Looks like a ski slope

[EasternLI]

30dbz just parked on my head. We're really stacking it up quickly right now. What a great event!

[WeatherGeek2025]

my snow weenie map may be underestimated at this point I got a foot of snow here in White Plains and dumping!

[Nibor]

Sleet is mixing in here. 

[nycsnow]

Just now, Nibor said:

Sleet is mixing in here. 

Mostly snow still?

[Nibor]

1 minute ago, nycsnow said:

Mostly snow still?

Yes. Quality of the flakes is doodoo. 

[weatherpruf]

22 minutes ago, RU848789 said:

As of 12 pm, we had 7.0" of snow and it was snowing very heavily at 14F.  I then shoveled for the next hour and around 12:40 or so, some sleet mixed in, but it wasn't "classic" spherical pellets, it looked more like small rods that might've actually been poorly formed flakes - weird stuff.  Anyway, finished my 2nd shoveling (denser) around 1 pm and we now have about 8.3", but it's getting harder to tell as the winds have picked up considerably, blowing/drifting the snow, so I had to average a bunch of measurements (luckily there's old crusty snow underneath, so not measuring on the board isn't an issue like it is on grass).  Made a nice snow angel.  Definitely a mix of snow and sleet and it keeps oscillating on which one dominates.  And if you want to see downtown Metuchen, News12 is doing a remote from there.  

8-12 was the mt holly call, iirc....let's see if we can add to that 8-9 with the sleet. we are getting the bad sleet now...straight pellets. can hear them outside.

[dWave]

On 1/22/2026 at 9:12 PM, donsutherland1 said:

These are the NWS maps from this afternoon/evening:

I meant the point and click forecast ppl see, added up was crazy amounts.

[Nibor]

Mostly sleet now but mixed with snow. 

[nycsnow]

Whiteout here 

[hooralph]

19 minutes ago, Nibor said:

Yes. Quality of the flakes is doodoo. 

Same here in Manhattan now (UWS). Whether it's sleet or not, flakes were bouncing off my coat now.

[dmillz25]

Sleet snow mix here 9.2” on the ground 

[Dan76]

Sleet in Freeport now 

[snywx]

Upton continues to increase the totals up here. Might have to go a bit more 

 

[JustinRP37]

Measured over 10 inches in my yard in Patterson. Absolutely ripping out there. Think we make 16-24 easily. 

[HIPPYVALLEY]

48 minutes ago, psv88 said:

A foot of pure snow, before a few inches of mix. 

That will give it some decent staying power with the BN temps. 
It will be fun to see the satellite snow cover images on Tuesday.

[jconsor]

50 minutes ago, NorthShoreWx said:

CC radar shows a mix line.  It's not a solid sleet front.  Parts of it advance and then wash out.  We could potentially hang on for another 3 or 4 hours here.  That might be enough to get us to a foot.

 

https://weather.cod.edu/satrad/nexrad/index.php?parms=OKX-N0C-1-12-100-usa-rad

 

RRFS has been doing well overall with the advance of the sleet.  It shows the sleet stalling and then retreating slightly next few hours, with mainly snow hanging on for North Shore of LI until around 0-1Z and northern parts of NYC even until 2-3Z.

The additional snow it shows from 17Z on is likely slightly overdone, but the idea that central-eastern LI catches up vs. most of NYC makes sense.

[Snowlover11]

4 minutes ago, snywx said:

Upton continues to increase the totals up here. Might have to go a bit more 

 

They will probably hit here im just sw of new city. Just cracked 10” here

[SnowGoose69]

1 minute ago, jconsor said:

RRFS has been doing well overall with the advance of the sleet.  It shows the sleet stalling and then retreating slightly next few hours, with mainly snow hanging on for North Shore of LI until around 0-1Z and northern parts of NYC even until 2-3Z.

The additional snow it shows from 17Z on is likely slightly overdone, but the idea that central-eastern LI catches up vs. most of NYC makes sense.

Yeah the good news is it seems the RRFS is close to as good as the NAM and better than the HRRR on this.  The HRRR actually picked up on it this event, probably  because it was such strong warm advection