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November 2013 Observations & Discussions


Rtd208

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That's not true at all, it's a large storm and right now all that matters is that it still exists. Why do people feel the need to tear apart every post?

I agree, a week away. Even if we don't get snow it would be nice to get some rain, and to show we can still get moderate precip in this dry pattern. Who knows, maybe it will get colder and stronger, unlikely but not impossible.

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Long range gfs hour 312, 1.00 qpf 850s south of Long Island whole time.

This one (on this GFS run) has a possibility if any one system does so far. There is less to interfere with this than its predecessor. However, with northeasterly winds and warmer ocean early in the season, at best, I think you could hope for a snow to rain or mix then back to snow type event with some slushy accumulation. The surface temperatures should be marginal. That said, future runs will show us if there will be another system behind this one to kick this out to sea or if the GFS has errored in keeping the high pressure to the north.

WX/PT

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I didn't say it was, but the fact that it's staying put and not sliding OTS is a sign of some blocking, of course it's just an amateur observation.

there is NO BLOCKING which is why the hP is able to escape east of Maine. If there was blocking it would be locked in somewhere over SW Quebec

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This one (on this GFS run) has a possibility if any one system does so far. There is less to interfere with this than its predecessor. However, with northeasterly winds and warmer ocean early in the season, at best, I think you could hope for a snow to rain or mix then back to snow type event with some slushy accumulation. The surface temperatures should be marginal. That said, future runs will show us if there will be another system behind this one to kick this out to sea or if the GFS has errored in keeping the high pressure to the north.

WX/PT

not sure thats right PT. As modeled with an RNA and a vortex in southern Greenland that storm would cut way west....nothing at all to force it south.

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not sure thats right PT. As modeled with an RNA and a vortex in southern Greenland that storm would cut way west....nothing at all to force it south.

Did I say it couldn't cut way west? I think there's a possibility. I don't think that I ruled that out anywhere in my statement. If the high to the north moved further east and were over Nova Scotia or off of the Maine coast it could certainly cut to the left rather than go under it. But so far, the pattern has favored systems tracking well south of us and/or hardly developing into what the models project well in advance.

WX/PT

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The  GFS really backed off the rain later this week from yesterday's run. What else is new. This isn't

turning out to be one of the driest falls on record for nothing.

 

 

 

Driest falls in NYC

 

3.90"...2013

4.00"...1908

4.67"...1909

4.93"...1881

4.97"...1931

5.02"...1879

 

yesterday

 

 

today

 

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0z Euro has another solution on the table for next week's storm

0z Euro snowmap

24wqyc4.jpg

map is a weenie algorithm wet dream. The BL is torching under 850.

Yep. Our 850's would never support that Map for the tday storm. Unfortautely I think we will see that weenie map a lot this year!

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We see the -EPO and -NAO ridges trying to poke into North Pole, over the next several days. That's why see AO drop on the CPC charts. But that pattern appears to regress next week on the latest guidance. So overall the +AO pattern continues.

 

Meanwhile, the Euro Ensemble mean does support storm forming over the Southeast next week. The question is how much phasing takes place? An earlier phase could support a bigger storm cutting to our west. A later phase could support a weaker storm tracking out to sea. The AO/NAO going positive later next week, doesn't make a solution somewhere in between appear likely:

 

34es4y8.jpg

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We see the -EPO and -NAO ridges trying to poke into North Pole, over the next several days. That's why see AO drop on the CPC charts. But that pattern appears to regress next week on the latest guidance. So overall the +AO pattern continues.

 

Meanwhile, the Euro Ensemble mean does support storm forming over the Southeast next week. The question is how much phasing takes place? An earlier phase could support a bigger storm cutting to our west. A later phase could support a weaker storm tracking out to sea. The AO/NAO going positive later next week, doesn't make a solution somewhere in between appear likely:

 

34es4y8.jpg

The NAO signal is all over the place in the latest ensemble guidance.

 

nao.sprd2.gif

 

Certainly we would like to see the riding further west over Greenland in order to get a big east coast storm in here.

 

test8.gif

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The  GFS really backed off the rain later this week from yesterday's run. What else is new. This isn't

turning out to be one of the driest falls on record for nothing.

 

 

 

Driest falls in NYC

 

3.90"...2013

4.00"...1908

4.67"...1909

4.93"...1881

4.97"...1931

5.02"...1879

 

yesterday

 

attachicon.gifOLD.png

 

today

 

attachicon.gifprec.png

 

12z is pretty dry also……looks like some sprinkles thats it. The beat goes on!

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four out of the five falls listed had snow in November and had temperatures above the normals for their time...

season.........Nov snow seasonal ave temp...

4.00"...1908...1.0"..........20.3"..........36.7..........the 1900's and 10's temp averaged 32.0 and 31.4" of snow...

4.67"...1909...0.8"..........27.2"..........30.5..........dito

4.93"...1881.....T............31.4"..........34.5..........the 1880's averaged 30.8 and 32.8" of snow...

4.97"...1931...2.0"............5.3"..........40.1..........the 20's and 30's averaged 25.9" of snow   temp for the 30's averaged 34.0...

5.02"...1879...2.5"..........22.7"..........38.5.........the 1870's averaged 31.5 and 31.9" of snow...

1909-10 was the coldest winter (the only one colder than average)and 1881-82 had the most snowfall...1909-10 had two 8"+ snowfalls...1881-82 had at least one 8" storm in January and set the coldest January temp of -6...

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