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December 2017 Discussions & Observations Thread


Rtd208

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2 hours ago, qg_omega said:

Classic MJO phase 7 with a background Nina state, I wouldn't underestimate the SE ridge

This. I guess some people don’t realize that the MJO phases have completely different effects on the long wave pattern based on whether you are in a La Niña, El Niño or neutral. Totally different

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29 minutes ago, Snow88 said:

EPO on the gefs is tanking off the charts just before xmas.

It looks to me as if there will be a 1-2 week relaxation and then more cold and threats of snow could arrive (probably within a few days on either side of the Christmas holiday), assuming the idea of an EPO-/PNA+ shown by the guidance is reasonably accurate.

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6 hours ago, Paragon said:

Don, is there a way of calculating which winter in NYC history had the most potential and what its likely range was?  Perhaps a winter in the 1800s- I think you mentioned that David Ludlum wrote an account of a winter just prior to when records started being kept at Central Park when over 90 inches of snow fell in New York City?

 

Reliable teleconnections data isn't available before 1950. The winter Ludlum referenced was 1867-68.

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33 minutes ago, snowman19 said:

This. I guess some people don’t realize that the MJO phases have completely different effects on the long wave pattern based on whether you are in a La Niña, El Niño or neutral. Totally different

I wouldn’t be totally afraid of the SE ridge in this pattern... that is some nice looking blocking in the Pacific... screams tons of energy and the SE ridge just funnels it right towards us... 

 

Sure we could see plenty of changeover events but I’ll roll the dice with that look on a nice SWFE, all it would take is one well timed HP in SE Canada(of which there is a lot modeled) to provide a nice front end dump event.

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9 minutes ago, Snow88 said:

GFS is closer with the coastal low for tomorrow night. CMC has about 1-3 for nyc tomorrow night. Weak coastal 

The RGEM has a light accumulation, too. With the PNA+, one can't rule out the developing storm's coming close enough to bring some snowfall to the area. It will be interesting to see what the later guidance shows.

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26 minutes ago, JetsPens87 said:

I wouldn’t be totally afraid of the SE ridge in this pattern... that is some nice looking blocking in the Pacific... screams tons of energy and the SE ridge just funnels it right towards us... 

 

Sure we could see plenty of changeover events but I’ll roll the dice with that look on a nice SWFE, all it would take is one well timed HP in SE Canada(of which there is a lot modeled) to provide a nice front end dump event.

Time and again we've seen the SE Ridge help bring storms up the coast that would have been out to sea in the 80s.

We walk a tight rope, so it's a nail biter for sure- but climatology around here makes that true 90% of the time.

Granted this is a better pattern in February (example Feb 2008 excellent front end dump of 6-8 inches), but it's still way better than cold and dry or warm and wet/dry.

 

No SE Ridge and invariably storms go west to east far south of us.

 

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1 hour ago, donsutherland1 said:

Reliable teleconnections data isn't available before 1950. The winter Ludlum referenced was 1867-68.

I did some research of past storms for my almanac page and found 1866-67 to be one of the snowiest winters...it had three major storms...1867-68 also had two major storms...

the New York Tribune newspaper from 1/1/1873 has a list of past snowstorms going back to 1854...the January 1857 storm is not listed and could be an error...

1872   1/1/1873

http://chroniclingamerica.loc.gov/lccn/sn83030214/1873-01-01/ed-1/seq-1/

this is what I found so far for the 1836 big snow and the 1857 blizzard...

1857 from the ny daily tribune...

http://chroniclingam...-20/ed-1/seq-5/

.

1836 'big snow' from the NY herald from 1/10/1836...

http://chroniclingamerica.loc.gov/lccn/sn83030311/1836-01-11/ed-1/seq-2/

articles I found for the 1866-67 winter...

January 1867

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-01-18/ed-1/seq-4/

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-01-21/ed-1/seq-5/

March 1867

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-03-18/ed-1/seq-5/

the winter of 1892-93...It had 77.6" of snow recorded in lower Manhattan...Much higher numbers than what was recorded in Central Park...

January 5th, 1893...A foot of snow...

http://chroniclingam...-06/ed-1/seq-1/

http://chroniclingamerica.loc.gov/lccn/sn83030214/1893-01-07/ed-1/seq-1/

January 12th, 1893...20" on the ground...

http://chroniclingam...-15/ed-1/seq-4/

http://chroniclingam...-13/ed-1/seq-1/

February 17th 1893...17" snowstorm...9" Central Park...

http://chroniclingam...-18/ed-1/seq-1/

http://bklyn.newspap...image/50379835/

The winter of 1893-94 had 37" of snow in February...much less recorded in Central Park...

January 27th, 1894...7" of snow...

http://bklyn.newspapers.com/image/50349197

http://chroniclingam...-28/ed-1/seq-4/

February 12th, 1894...14" of snow...

http://chroniclingam...-13/ed-1/seq-1/

http://chroniclingam...-13/ed-1/seq-2/

http://chroniclingam...-13/ed-1/seq-1/

February 26th, 1894...8" of snow/sleet

http://chroniclingam...-27/ed-1/seq-1/

http://chroniclingam...-26/ed-1/seq-1/

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1 hour ago, JetsPens87 said:

And I wouldn’t underestimate the -EPO

Agreed , -EPO H/P confluence through the lakes is always under modeled 

If you guys are betting on a warm SE ridge you're going to lose 

I only show up here before events , 

Merry Christmas week

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35 minutes ago, bluewave said:

The EPS weeklies are going for a long duration southward dropping gradient pattern. Holds onto the -EPO through January 7th. One of the few times that we have seen such good agreement between the EPS weeklies and JMA weeklies. Very active SWFE overrunning storm track.

Average gradient location for 7 day periods

12/21-12/28....I-80

12/25-01/01...ACY

12/28-01/04...SBY

01/01-01/08...RDU

01/04-01/11...RDU

Is this reminiscent of the pattern in 1993-1994? 

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8 hours ago, uncle W said:

I did some research of past storms for my almanac page and found 1866-67 to be one of the snowiest winters...it had three major storms...1867-68 also had two major storms...

the New York Tribune newspaper from 1/1/1873 has a list of past snowstorms going back to 1854...the January 1857 storm is not listed and could be an error...

1872   1/1/1873

http://chroniclingamerica.loc.gov/lccn/sn83030214/1873-01-01/ed-1/seq-1/

this is what I found so far for the 1836 big snow and the 1857 blizzard...

1857 from the ny daily tribune...

http://chroniclingam...-20/ed-1/seq-5/

.

1836 'big snow' from the NY herald from 1/10/1836...

http://chroniclingamerica.loc.gov/lccn/sn83030311/1836-01-11/ed-1/seq-2/

articles I found for the 1866-67 winter...

January 1867

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-01-18/ed-1/seq-4/

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-01-21/ed-1/seq-5/

March 1867

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-03-18/ed-1/seq-5/

the winter of 1892-93...It had 77.6" of snow recorded in lower Manhattan...Much higher numbers than what was recorded in Central Park...

January 5th, 1893...A foot of snow...

http://chroniclingam...-06/ed-1/seq-1/

http://chroniclingamerica.loc.gov/lccn/sn83030214/1893-01-07/ed-1/seq-1/

January 12th, 1893...20" on the ground...

http://chroniclingam...-15/ed-1/seq-4/

http://chroniclingam...-13/ed-1/seq-1/

February 17th 1893...17" snowstorm...9" Central Park...

http://chroniclingam...-18/ed-1/seq-1/

http://bklyn.newspap...image/50379835/

The winter of 1893-94 had 37" of snow in February...much less recorded in Central Park...

January 27th, 1894...7" of snow...

http://bklyn.newspapers.com/image/50349197

http://chroniclingam...-28/ed-1/seq-4/

February 12th, 1894...14" of snow...

http://chroniclingam...-13/ed-1/seq-1/

http://chroniclingam...-13/ed-1/seq-2/

http://chroniclingam...-13/ed-1/seq-1/

February 26th, 1894...8" of snow/sleet

http://chroniclingam...-27/ed-1/seq-1/

http://chroniclingam...-26/ed-1/seq-1/

What a great find.  It is fascinating to read those accounts from 1836, 180+ years ago.  It is interesting how it opens with "New York has just been visted by one of the most splendid snow storms that ever perhaps has taken place since the old colonial times, when sleighing continued on Manhattan island for three or four months a year without intermission."  The way that three to four months of consecutive snowcover is mentioned as if it is common knowledge is interesting.  Also funny how at the time of this writing, "colonial times" was only 60 years prior.

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47 minutes ago, coastalplainsnowman said:

What a great find.  It is fascinating to read those accounts from 1836, 180+ years ago.  It is interesting how it opens with "New York has just been visted by one of the most splendid snow storms that ever perhaps has taken place since the old colonial times, when sleighing continued on Manhattan island for three or four months a year without intermission."  The way that three to four months of consecutive snowcover is mentioned as if it is common knowledge is interesting.  Also funny how at the time of this writing, "colonial times" was only 60 years prior.

I remember seeing an old almanac with snowfall records from Battery Park...It had 1892-93 with 77.6" of snow...Central Park had around 50"...these articles mention a 17" snowstorm and 20" on the ground when Central Park's biggest storm was 9"...

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34 minutes ago, uncle W said:

I remember seeing an old almanac with snowfall records from Battery Park...It had 1892-93 with 77.6" of snow...Central Park had around 50"...these articles mention a 17" snowstorm and 20" on the ground when Central Park's biggest storm was 9"...

Over the years on this board I've seen a lot of posts about undermeasurement at Central Park.  That goes back at least 125 years apparently.

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8 hours ago, coastalplainsnowman said:

What a great find.  It is fascinating to read those accounts from 1836, 180+ years ago.  It is interesting how it opens with "New York has just been visted by one of the most splendid snow storms that ever perhaps has taken place since the old colonial times, when sleighing continued on Manhattan island for three or four months a year without intermission."  The way that three to four months of consecutive snowcover is mentioned as if it is common knowledge is interesting.  Also funny how at the time of this writing, "colonial times" was only 60 years prior.

In the Pennsylvania Weather Book they mention that a couple of the years quoted had 100"+ inch totals at both Philly and New York City.

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9 hours ago, bluewave said:

The EPS weeklies are going for a long duration southward dropping gradient pattern. Holds onto the -EPO through January 7th. One of the few times that we have seen such good agreement between the EPS weeklies and JMA weeklies. Very active SWFE overrunning storm track.

Average gradient location for 7 day periods

12/21-12/28....I-80

12/25-01/01...ACY

12/28-01/04...SBY

01/01-01/08...RDU

01/04-01/11...RDU

So the gradient keeps sinking south throughout the period? Which is the ideal location for us- ACY?

RDU sounds like suppression lol.

 

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16 hours ago, uncle W said:

I did some research of past storms for my almanac page and found 1866-67 to be one of the snowiest winters...it had three major storms...1867-68 also had two major storms...

the New York Tribune newspaper from 1/1/1873 has a list of past snowstorms going back to 1854...the January 1857 storm is not listed and could be an error...

1872   1/1/1873

http://chroniclingamerica.loc.gov/lccn/sn83030214/1873-01-01/ed-1/seq-1/

this is what I found so far for the 1836 big snow and the 1857 blizzard...

1857 from the ny daily tribune...

http://chroniclingam...-20/ed-1/seq-5/

.

1836 'big snow' from the NY herald from 1/10/1836...

http://chroniclingamerica.loc.gov/lccn/sn83030311/1836-01-11/ed-1/seq-2/

articles I found for the 1866-67 winter...

January 1867

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-01-18/ed-1/seq-4/

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-01-21/ed-1/seq-5/

March 1867

http://chroniclingamerica.loc.gov/lccn/sn83030214/1867-03-18/ed-1/seq-5/

the winter of 1892-93...It had 77.6" of snow recorded in lower Manhattan...Much higher numbers than what was recorded in Central Park...

January 5th, 1893...A foot of snow...

http://chroniclingam...-06/ed-1/seq-1/

http://chroniclingamerica.loc.gov/lccn/sn83030214/1893-01-07/ed-1/seq-1/

January 12th, 1893...20" on the ground...

http://chroniclingam...-15/ed-1/seq-4/

http://chroniclingam...-13/ed-1/seq-1/

February 17th 1893...17" snowstorm...9" Central Park...

http://chroniclingam...-18/ed-1/seq-1/

http://bklyn.newspap...image/50379835/

The winter of 1893-94 had 37" of snow in February...much less recorded in Central Park...

January 27th, 1894...7" of snow...

http://bklyn.newspapers.com/image/50349197

http://chroniclingam...-28/ed-1/seq-4/

February 12th, 1894...14" of snow...

http://chroniclingam...-13/ed-1/seq-1/

http://chroniclingam...-13/ed-1/seq-2/

http://chroniclingam...-13/ed-1/seq-1/

February 26th, 1894...8" of snow/sleet

http://chroniclingam...-27/ed-1/seq-1/

http://chroniclingam...-26/ed-1/seq-1/

For some reason our biggest winters seem to occur around the time of some big war, so I guess that's what we need right now to get a big winter (JK).

 

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8 hours ago, coastalplainsnowman said:

What a great find.  It is fascinating to read those accounts from 1836, 180+ years ago.  It is interesting how it opens with "New York has just been visted by one of the most splendid snow storms that ever perhaps has taken place since the old colonial times, when sleighing continued on Manhattan island for three or four months a year without intermission."  The way that three to four months of consecutive snowcover is mentioned as if it is common knowledge is interesting.  Also funny how at the time of this writing, "colonial times" was only 60 years prior.

Going back to the 1700s there are some winters quoted with constant snowcover from Thanksgiving right through Easter.  Shops setting up in the middle of the Hudson River and people walking across, etc.

Three foot snowstorms with temps near 0, etc.

Funny thing is going back as far as I could in time with records, I could only find one record of a temp below the -15 recorded in Feb 1934, and that was -16 in January of some year in the 1700s! I think that was the big New England winter when they had three snowstorms that covered the first stories of houses.

I found a copy of a really old Almanac at the New York Public Library that has temp records for NYC going all the way back to the early 1700s and it's interesting that back then February was consistently colder than January (but both had average temps in the 20s- January was like 28, and February around 25 average temp.)

 

 

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