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OBS-Nows for the Tues AM 12/24 2 hour burst of snow near daybreak. There may be a little ice on extreme se edge of the subforum s of I78 and e LI.

wdrag

By wdrag,
in New York City Metro

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hooralph
hooralph

I don’t care if it holds on until tomorrow. Let the record show: this was Christmas Eve in Manhattan, 2024.  

donsutherland1
donsutherland1

Five photos from this morning's snowfall:  

MJO812
MJO812

Beautiful  Everything covered

Posted Images

psv88

psv88

Posted
Posted
2 minutes ago, eduggs said:

How long will the snow last under full sun? Already melting fast despite the relatively low dews.

Can’t imagine an inch of snow lasts until tomorrow with temps in upper 30s. 

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RU848789

RU848789

Posted
Posted
2 minutes ago, psv88 said:

Can’t imagine an inch of snow lasts until tomorrow with temps in upper 30s. 

Disagree.  While most/all of the snow on paved surfaces will likely be gone, we're only talking 6-7 hours above 32F (and only maybe 1-2 hours above 36F), with temps back down to 32F by 6-7 pm and the sun just came out partly here around 1 pm, so there's only ~3 hours of meaningful sun left today, at the lowest sun angle of the year...so I'm expecting at least some of the new snow to survive (1/3 to half left?).  I will be checking later today.  

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psv88

psv88

Posted
Posted
11 minutes ago, Allsnow said:

Nyc had inch to start on the ground before today snow. 

It’s 36 and sunny in the park. 39 at JFK and 38 at Newark. my guess is that there will be less than 1/2” on the ground by tomorrow at 7 am. 
 

but to me it’s a white Christmas anyway. Many people celebrate today and the snow has been around all week. 

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LibertyBell

LibertyBell

Posted
Posted
2 hours ago, Stormlover74 said: 
CTZ005>012-NJZ002-004-006-103>108-NYZ067>075-078>081-176>179-250424-

Public Information Statement
National Weather Service New York NY
1124 AM EST Tue Dec 24 2024

...SNOWFALL REPORTS...

Location                     Amount    Time/Date       Provider

...Connecticut...

...Fairfield County...
2 SSW Weston                 1.3 in    1000 AM 12/24   Public
2 ESE Danbury                1.2 in    0930 AM 12/24   Trained Spotter
2 W Darien                   1.0 in    1010 AM 12/24   Public
1 W Redding                  1.0 in    0900 AM 12/24   Public
Bethel                       0.7 in    1018 AM 12/24   COCORAHS
2 WNW Fairfield              0.7 in    1015 AM 12/24   Public
2 SSE New Canaan             0.7 in    0930 AM 12/24   Public
2 NNE Norwalk                0.7 in    0910 AM 12/24   Trained Spotter

...Middlesex County...
Clinton                      0.1 in    1000 AM 12/24   Broadcast Media

...New Haven County...
Yalesville                   0.3 in    0900 AM 12/24   COCORAHS

...New Jersey...

...Bergen County...
Waldwick                     1.0 in    0915 AM 12/24   Public
Oakland                      1.0 in    0800 AM 12/24   COCORAHS
1 N River Vale               0.9 in    0930 AM 12/24   Trained Spotter
Montvale 1.8 ESE             0.8 in    0800 AM 12/24   COCORAHS
1 WSW Wallington             0.7 in    0913 AM 12/24   Trained Spotter
Palisades Park               0.6 in    0920 AM 12/24   COCORAHS
River Edge                   0.5 in    0840 AM 12/24   Public

...Essex County...
1 NNW Newark Airport         1.0 in    0930 AM 12/24   Official NWS Obs
1 E Livingston               1.0 in    0926 AM 12/24   Public
West Orange                  1.0 in    0900 AM 12/24   Public
Maplewood                    0.6 in    0857 AM 12/24   COCORAHS

...Hudson County...
1 WSW Hoboken                1.0 in    0900 AM 12/24   COCORAHS
Harrison                     1.0 in    0800 AM 12/24   COOP
Hoboken                      0.9 in    0945 AM 12/24   Trained Spotter
1 NE East Newark             0.9 in    0930 AM 12/24   Cocorahs

...Passaic County...
Wayne                        2.0 in    0700 AM 12/24   COCORAHS
West Milford                 1.1 in    0720 AM 12/24   COCORAHS

...Union County...
1 WSW Elizabeth              1.1 in    0910 AM 12/24   Trained Spotter
New Providence               0.6 in    0730 AM 12/24   COCORAHS

...New York...

...Bronx County...
1 NW Fordham                 1.0 in    0900 AM 12/24   Trained Spotter

...Kings County...
Midwood                      1.1 in    0954 AM 12/24   Broadcast Media

...Nassau County...
1 SE Glen Cove               0.9 in    0951 AM 12/24   Public
1 N Syosset                  0.5 in    0945 AM 12/24   Trained Spotter
1 WSW Plainview              0.2 in    1000 AM 12/24   Public

...New York (Manhattan) County...
Central Park                 1.0 in    0930 AM 12/24   Official NWS Obs

...Orange County...
0.8 N Port Jervis            2.5 in    0700 AM 12/24   COOP
Port Jervis                  1.8 in    0800 AM 12/24   COCORAHS
1 WNW Monroe                 1.6 in    0805 AM 12/24   Public
Chester                      1.5 in    0945 AM 12/24   Cocorahs
2 SSW Stewart Airport        1.0 in    0855 AM 12/24   Public
Warwick                      1.0 in    0700 AM 12/24   COCORAHS

...Putnam County...
Nelsonville 0.3 S            1.4 in    0715 AM 12/24   COCORAHS

...Queens County...
1 W Elmhurst                 1.0 in    0900 AM 12/24   Storm Chaser
JFK Airport                  0.5 in    0950 AM 12/24   Official NWS Obs
La Guardia Airport           0.4 in    0935 AM 12/24   Official NWS Obs

...Richmond County...
Huguenot                     1.5 in    1015 AM 12/24   Public
1 E New Dorp                 1.2 in    0929 AM 12/24   Public

...Rockland County...
Chestnut Ridge               1.0 in    0850 AM 12/24   Trained Spotter
Spring Valley 1.7 SSW        1.0 in    0850 AM 12/24   COCORAHS

...Suffolk County...
Islip Airport                0.1 in    1020 AM 12/24   Official NWS Obs
Upton (NWS Office)            T  in    1028 AM 12/24   Official NWS Obs

...Westchester County...
Croton-on-Hudson             1.3 in    0850 AM 12/24   Public
Peekskill                    1.1 in    0855 AM 12/24   Trained Spotter
Armonk                       0.8 in    0800 AM 12/24   COCORAHS
&&

wow JFK 0.5 and LGA 0.4 significantly lower than the Park, but it does get all airport locations near the city to 3.0" or higher!

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LibertyBell

LibertyBell

Posted
Posted
24 minutes ago, psv88 said:

It’s 36 and sunny in the park. 39 at JFK and 38 at Newark. my guess is that there will be less than 1/2” on the ground by tomorrow at 7 am. 
 

but to me it’s a white Christmas anyway. Many people celebrate today and the snow has been around all week. 

yes the 25th is the day to sleep, today is defacto Christmas

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winterwx21

winterwx21

Posted
Posted
1 hour ago, RU848789 said:

Disagree.  While most/all of the snow on paved surfaces will likely be gone, we're only talking 6-7 hours above 32F (and only maybe 1-2 hours above 36F), with temps back down to 32F by 6-7 pm and the sun just came out partly here around 1 pm, so there's only ~3 hours of meaningful sun left today, at the lowest sun angle of the year...so I'm expecting at least some of the new snow to survive (1/3 to half left?).  I will be checking later today.  

It's up to 38 here now with more sun, and the snow is melting quickly. I'm starting to see patches of bare ground in sunny spots again. But at least the shadier spots will have enough snow left on the ground tomorrow. 

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RU848789

RU848789

Posted
Posted
28 minutes ago, winterwx21 said:

It's up to 38 here now with more sun, and the snow is melting quickly. I'm starting to see patches of bare ground in sunny spots again. But at least the shadier spots will have enough snow left on the ground tomorrow. 

Of course most paved spots that had some traffic and sunny spots near trees (which absorb heat well and "spread" that to the ground) will be bare, but the sidewalk across the street from me is 100% covered (it was undisturbed) and my entire property, except the very back where there are a bunch of trees, has 1.5-2.5", as we've lost maybe 1/2" to compaction/melting.  Also, any undisturbed open field in the sun in town has 2+" on it, as melting is far slower when there is no exposed pavement or no trees to initiate melting at the boundaries.  

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LibertyBell

LibertyBell

Posted
Posted
46 minutes ago, RU848789 said:

Of course most paved spots that had some traffic and sunny spots near trees (which absorb heat well and "spread" that to the ground) will be bare, but the sidewalk across the street from me is 100% covered (it was undisturbed) and my entire property, except the very back where there are a bunch of trees, has 1.5-2.5", as we've lost maybe 1/2" to compaction/melting.  Also, any undisturbed open field in the sun in town has 2+" on it, as melting is far slower when there is no exposed pavement or no trees to initiate melting at the boundaries.  

Thanks, I didn't know about the trees, I thought trees would actually create more shade and keep snow from melting-- talking about evergreens of course.  At least in the summer, it's always cooler near the shade of trees.

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RU848789

RU848789

Posted
Posted

Here are a couple of pics from about sunset.  The first shows that without traffic today's snow (no snow was left on paved surfaces from Saturday since there wasn't much accumulation on them to begin with) held on pretty well on streets and sidewalks and the 2nd shows 0.9" on the sidewalk across the street from me vs 1.1" that fell.

And the next pic shows we still have about 2.8" out of the 4.4" that fell since Sat (loss due to melting and compaction). Yes there are some south facing yards with bare spots next to paved surfaces and trees, but most yards have 1-2" of snow (my yard is more shady than most, hence the 2.8").

May be an image of road and street

May be an image of snowball, tree and road

May be an image of snowball, measuring stick, ski slope and arctic

 

 

 

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psv88

psv88

Posted
Posted
2 hours ago, jm1220 said:

Half a white Christmas here. Since the sun came out every south facing lawn is almost bare but north facing is holding onto the snow. 

Yea same here. Streets in the shade have full cover. It’s 28 now and there’s snow on the ground. It’s a white Christmas lol

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RU848789

RU848789

Posted
Posted
1 hour ago, LibertyBell said:

Thanks, I didn't know about the trees, I thought trees would actually create more shade and keep snow from melting-- talking about evergreens of course.  At least in the summer, it's always cooler near the shade of trees.

I was talking more about deciduous trees - the dark wood absorbs a lot of UV radiation and the trees then become a heat source at ground level and help melt snow on the ground.  Of course on the north side of any tree that provide shade, melting will be less otg than when open to the sun.  The other thing that thick evergreen rows can do is catch most of the snow, so it doesn't accumulate much underneath and then that area melts first and spreads. 

One thing I think many don't get is that melting is not simply a "top down" process where the top (or bottom if the ground is warm - not an issue for this event), but is often more influenced by a "boundary" process, where the melting is driven by areas that first melt near warmer boundaries, like paved surfaces or tree trunks or grass under evergreens, and then that boundary just continues horizontally as new areas of grass become exposed to the sun.  

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