Central Park (CP): First Trace or measurable snow Wednesday 12/9/20?

[Stormlover74]

Just now, NEG NAO said:

Any reports of snow in NYC ? seems it is having a hard time making it across the Hudson on radar

Snowing in Brooklyn according to ant

[dmillz25]

1 minute ago, NEG NAO said:

Any reports of snow in NYC ? seems it is having a hard time making it across the Hudson on radar

Snowing decently here in Brooklyn 

[Eduardo]

Yeah I can confirm first flakes here in Brooklyn Heights!

[wdrag]

Wantage NJ (8 s High Point) 0.5" so far. Roads wet.  Driveway mostly wet but some slight accumulation.  Concrete and pavers accumulating. Nice small flake snow continues. 30.2F

[wdrag]

Yea...NYC First trace of the season- unmistakeable at the KNYC ASOS!! 

 

[NEG NAO]

Moderate Snow here on border of Middlesex Union County NJ sticking to everything but roads - more then a Trace now

[wdrag]

The 2" report just east of Scranton its probably closer to 3.5" .. solid event there. Here's some snow reports that are posted by the NWS.

[Rtd208]

Light snow falling here since about 11:30 am. Beautiful. 

[FPizz]

About .75 here in Branchburg.

[ILoveWinter]

light to moderate in UWS, just started to stick to grassy surfaces though still mostly a wet look 

[STORMANLI]

Light snow began 201pm

Vis ocnl 2sm

[psv88]

7 minutes ago, STORMANLI said:

Light snow began 201pm

Vis ocnl 2sm

Confirmed. 35.2 degrees and not hard enough for even a dusting. Goes down as a T

[doncat]

Snowed pretty good for awhile here on si...covered all non paved areas, temp dropped to 32° during snow...Put it down as 0.2"...First measurable snow since Jan 18th.

[wdrag]

Wantage NJ, last band on its way in now for us out here.  0.8" solid.  Thanks for adding your data.  Will be curious what OKX does for CLI tonight--- 430CLI is prelim. The 130A Thursday will be the  official.  

CP ASOS had moderate snow at a temp I think around 33F.  Looks to me like first measurable snow must have occurred.  Also note the moderate snow around 1P and the early morning NAM 3K image post on the DGZ lift.  It doesn't take a lot of lift in the DGZ to make good sized flakes.  NAM was pretty good for this event, I think. 

KNYC 091951Z AUTO VRB04KT 6SM HZ BKN016 BKN037 OVC070 01/M02 A2976 RMK AO2 SNE20 SLP070 P0000 T00111017 $
KNYC 091943Z AUTO 7SM SCT014 BKN037 OVC070 01/M02 A2976 RMK AO2 SNE20 P0000 T00111017 $
KNYC 091921Z AUTO 23007G15KT 200V270 3SM BR FEW010 BKN014 OVC034 01/M02 A2976 RMK AO2 SNE20 P0000 T00061017 $
KNYC 091915Z AUTO 22006G21KT 1 3/4SM -SN BR SCT010 BKN015 OVC036 01/M02 A2976 RMK AO2 P0000 T00061017 $
KNYC 091907Z AUTO 26007G16KT 210V010 1SM -SN BR BKN010 BKN015 OVC021 01/M02 A2976 RMK AO2 P0000 T00061017 $
KNYC 091851Z AUTO 24009G15KT 1/2SM -SN FG BKN009 OVC015 00/M02 A2977 RMK AO2 SLP074 P0004 T00001017 $
KNYC 091808Z AUTO VRB03G15KT 1/4SM SN FG BKN009 OVC016 01/M02 A2979 RMK AO2 P0001 T00061017 $
KNYC 091751Z AUTO VRB05KT 1/2SM -SN FG SCT008 OVC016 01/M02 A2979 RMK AO2 SNB09 SLP080 P0001 60001 T00061017 10033 20006 56021 $
KNYC 091731Z AUTO VRB06G15KT 1/2SM SN FEW009 BKN023 OVC031 01/M02 A2980 RMK AO2 SNB09 P0000 T00111022 $
KNYC 091723Z AUTO VRB06G18KT 1 1/4SM -SN FEW012 BKN031 OVC041 01/M03 A2980 RMK AO2 SNB09 P0000 T00111028 $
KNYC 091716Z AUTO 24011G18KT 2SM -SN BKN029 BKN043 OVC055 02/M03 A2980 RMK AO2 SNB09 P0000 T00171028 $

 

Snow reports so far by the NWS.

 

[wdrag]

I see OKX afternoon prelim CLI for CP as T snowfall today. 

[wdrag]

I wasn't there, but did CP not have any cover on grassy surfaces yesterday?  They had .05" of melted snowfall... and moderate snow at times. I would ave thought a slimy wet snow covering of 0.1? 

[hooralph]

2 hours ago, wdrag said:

I wasn't there, but did CP not have any cover on grassy surfaces yesterday?  They had .05" of melted snowfall... and moderate snow at times. I would ave thought a slimy wet snow covering of 0.1? 

Would have thought so. Last night there was even some remnant traces on the grass near Riverside Park.

[wdrag]

A little late and after the fact, but here is the CoCoRAHS snowfall report for Thursday December 9, 2020, NYC forum.

[LibertyBell]

On 12/9/2020 at 12:51 PM, wdrag said:

The 2" report just east of Scranton its probably closer to 3.5" .. solid event there. Here's some snow reports that are posted by the NWS.

Thanks for this Walt!  The Scranton total was updated to 3.3!  Where was the 4" report from?  Also, looks like my other home in Albrightsville didn't get an inch?

 

[LibertyBell]

1 hour ago, wdrag said:

A little late and after the fact, but here is the CoCoRAHS snowfall report for Thursday December 9, 2020, NYC forum.

edit updated map shows 3.7 at Scranton and 2.6 right near my other house, got a nice T (long duration snow flurries) here on Long Island

[LibertyBell]

15 hours ago, wdrag said:

I wasn't there, but did CP not have any cover on grassy surfaces yesterday?  They had .05" of melted snowfall... and moderate snow at times. I would ave thought a slimy wet snow covering of 0.1? 

heard there was a dusting on the sheeps meadow but not enough to measure

[CPcantmeasuresnow]

I've touched on this subject quite a bit the last two years, but now that we're down to the last three weeks I thought it would be a good time to review where NYC, Central Park specifically, stands in the quest for a 30 inch snowfall average when the new 30 year averages are calculated next month.

For those not aware how it works the 30 year snowfall averages will be calculated for the period from January 1991 through December 2020. In short this will mean say goodbye to the 1980's from the averages, which hold the record as the least snowiest decade recorded.

Assuming NOAA calculates the averages for each month by rounding up or down to the nearest tenth of an inch, the months who have their 30 years completed look as follows:

October..........0.1

November.....0.5

December.....4.9 (29 year avg)  final number to be determined

January.........8.7

February......10.1

March............5.0

April..............0.4

May..................T

The 30 year average calculated now would be 29.7 inches.

To get December to a 5.2 average, or in this case 5.15 which should round up to 5.2, Central Park will need to record 11.3 inches of snow this December, which is what will be needed to get the 30 year average to 30.0 inches. Currently the December 1991 -2020 period averages 4.773 inches which would round to 4.8 and would make the 30 year average 29.6 inches if no snow falls this December.

Here's to hoping that if Wednesday is indeed a surprise heavy snowfall for the city, the Conservancy? doesn't measure 11.2 inches and leave us hanging for the rest of the month.

Any interested parties please check the above numbers.

And we wait for the final returns.

 

[uncle W]

1 hour ago, CPcantmeasuresnow said:

I've touched on this subject quite a bit the last two years, but now that we're down to the last three weeks I thought it would be a good time to review where NYC, Central Park specifically, stands in the quest for a 30 inch snowfall average when the new 30 year averages are calculated next month.

For those not aware how it works the 30 year snowfall averages will be calculated for the period from January 1991 through December 2020. In short this will mean say goodbye to the 1980's from the averages, which hold the record as the least snowiest decade recorded.

Assuming NOAA calculates the averages for each month by rounding up or down to the nearest tenth of an inch, the months who have their 30 years completed look as follows:

October..........0.1

November.....0.5

December.....4.9 (29 year avg)  final number to be determined

January.........8.7

February......10.1

March............5.0

April..............0.4

May..................T

The 30 year average calculated now would be 29.7 inches.

To get December to a 5.2 average, or in this case 5.15 which should round up to 5.2, Central Park will need to record 11.3 inches of snow this December, which is what will be needed to get the 30 year average to 30.0 inches. Currently the December 1991 -2020 period averages 4.773 inches which would round to 4.8 and would make the 30 year average 29.6 inches if no snow falls this December.

Here's to hoping that if Wednesday is indeed a surprise heavy snowfall for the city, the Conservancy? doesn't measure 11.2 inches and leave us hanging for the rest of the month.

Any interested parties please check the above numbers.

And we wait for the final returns.

 

1990-91 to 2019-20......0.1.....0.5.....5.0......8.8....10.2.....5.0......0.4.....30.0...

1990-91 to 1999-00........0......0.3.....2.9......6.9......9.1.....5.4......0.2.....24.8
2000-01 to 2009-10........T........T......7.8......6.5....13.3.....3.5......0.4.....31.5
2010-11 to 2019-20......0.3.....1.1.....4.4....12.9......8.1.....6.0......0.6..…33.4

[uncle W]

On 12/10/2020 at 6:04 AM, wdrag said:

I wasn't there, but did CP not have any cover on grassy surfaces yesterday?  They had .05" of melted snowfall... and moderate snow at times. I would ave thought a slimy wet snow covering of 0.1? 

there is a history of under measuring very minor events there...

[CPcantmeasuresnow]

3 hours ago, CPcantmeasuresnow said:

I've touched on this subject quite a bit the last two years, but now that we're down to the last three weeks I thought it would be a good time to review where NYC, Central Park specifically, stands in the quest for a 30 inch snowfall average when the new 30 year averages are calculated next month.

For those not aware how it works the 30 year snowfall averages will be calculated for the period from January 1991 through December 2020. In short this will mean say goodbye to the 1980's from the averages, which hold the record as the least snowiest decade recorded.

Assuming NOAA calculates the averages for each month by rounding up or down to the nearest tenth of an inch, the months who have their 30 years completed look as follows:

October..........0.1

November.....0.5

December.....4.9 (29 year avg)  final number to be determined

January.........8.7

February......10.1

March............5.0

April..............0.4

May..................T

The 30 year average calculated now would be 29.7 inches.

To get December to a 5.2 average, or in this case 5.15 which should round up to 5.2, Central Park will need to record 11.3 inches of snow this December, which is what will be needed to get the 30 year average to 30.0 inches. Currently the December 1991 -2020 period averages 4.773 inches which would round to 4.8 and would make the 30 year average 29.6 inches if no snow falls this December.

Here's to hoping that if Wednesday is indeed a surprise heavy snowfall for the city, the Conservancy? doesn't measure 11.2 inches and leave us hanging for the rest of the month.

Any interested parties please check the above numbers.

And we wait for the final returns.

 

 

2 hours ago, uncle W said:

1990-91 to 2019-20......0.1.....0.5.....5.0......8.8....10.2.....5.0......0.4.....30.0...

1990-91 to 1999-00........0......0.3.....2.9......6.9......9.1.....5.4......0.2.....24.8
2000-01 to 2009-10........T........T......7.8......6.5....13.3.....3.5......0.4.....31.5
2010-11 to 2019-20......0.3.....1.1.....4.4....12.9......8.1.....6.0......0.6..…33.4

You're 30 years are off slightly from mine Uncle.

February will be 10.1 as they don't add the 3 decade averages and divide by 3, but they add each of the 30 years and divide by 30. February average is 10.147 when done my way which I assume they will round down to 10.1.

January is the same, it comes out as 8.740 my way, which again I assume will be rounded down to 8.7 

Either way we're close. I'm hoping it happens, if so it will be the first 30 year average above 30 inches in NYC since the 1891-1920 period.

[LibertyBell]

Hopefully we'll get a couple of moderate to large events and clear the hurdle with some room to spare.

Imagine we'd already be there if the awfulness of last winter hadn't happened.