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December 2022


dmillz25
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The Euro is definitely pumping up potential for this Thursday. It's just going to be difficult to sustain enough cold air here without cold HP locked in to our north and a good 50/50 low. Then again the actual storm track it is depicting would seem to be a rain to snow track with possibly accumulating snows region-wide. Still, I'd need to see more runs showing this to have much confidence in it.

WX/PT

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Something funky about this year. I've been saying since November. Just peeking at the extended 00z eps. The look from the 12z yesterday has held serve.

What raised an eyebrow for me is this curious little move on the cluster analysis. Check out the arctic profile on last night's leading cluster. That was the 2nd place cluster on yesterday's run. So last night it takes the lead? Thought that was a bit interesting. They're centered on Europe, so rotate your screen accordingly. (Green border just means -NAO profile)

872596385_index(11).thumb.png.86a74894791e0118ea8f1a567b1b61d5.png

20221210_051026.thumb.jpg.423dd3d9e8e166a14bdd84390a5c4b51.jpg

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Upton waiting (as they should) to commit to anything for the late week system:

There remains a high degree of uncertainty for what may happen late 
week, but the current thinking is that shortwave energy associated 
with the cold front of the large cyclone over the Great Plains 
shifts toward the East Coast on Wednesday night and into Thursday. 
This may result in the redevelopment of a deepening surface cyclone 
off the Mid-Atlantic coast by Thursday and into Friday. There 
remains questions as to the degree of deepening, placement of the 
low in relation to our area, surface temperatures, interactions with 
the trough that remains to the east of the area, as well as the 
timing of development. Additionally, there isn't much eastward 
progression with the upper-level flow so the low may meander a bit 
into the weekend. As a result, this remains a fairly uncertain 
forecast with any specifics difficult to pinpoint at this time. For 
now, capped PoPs at chance for much of the timeframe with a mix of 
rain and snow possible for much of the area.
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5 minutes ago, Ralph Wiggum said:

I misinterpreted both posts as meaning 2 opposing views thus the confused emoji. I like where the GFS headed. 

I agree with Ant about the GFS in terms of consistency.  As a PA guy I will take the 06z solution- knowing full well that there will be something totally different at 12z.

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Morning thoughts…

Today will be partly to mostly sunny and cool. High temperatures will reach the lower and middle 40s in most of the region. Likely high temperatures around the region include:

New York City (Central Park): 41°

Newark: 43°

Philadelphia: 45°

A system will bring rain and snow to parts of the region late tomorrow into Monday. Some areas could see a light accumulation.

Normals:

New York City: 30-Year: 45.8°; 15-Year: 46.4°

Newark: 30-Year: 46.3°; 15-Year: 47.1°

Philadelphia: 30-Year: 47.4°; 15-Year: 48.3°

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One of the few Decembers when the AO made it to -4 or lower.

https://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.ao.index.b500101.current.ascii


https://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/norm.daily.ao.nao.pna.aao.gdas.120days.csv

10Dec2022 -4.0676

Decembers with a -4 or lower reading 

2022

2000

1995

1968

1966

1962

1950

Lower than -5

2010

2009

1976

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3 hours ago, EasternLI said:

Something funky about this year. I've been saying since November. Just peeking at the extended 00z eps. The look from the 12z yesterday has held serve.

What raised an eyebrow for me is this curious little move on the cluster analysis. Check out the arctic profile on last night's leading cluster. That was the 2nd place cluster on yesterday's run. So last night it takes the lead? Thought that was a bit interesting. They're centered on Europe, so rotate your screen accordingly. (Green border just means -NAO profile)

872596385_index(11).thumb.png.86a74894791e0118ea8f1a567b1b61d5.png

20221210_051026.thumb.jpg.423dd3d9e8e166a14bdd84390a5c4b51.jpg

What are your thoughts on the potential arctic outbreak. 

GEFS seems less enthusiastic (looks like more spread rather than a completely different look)

Do you know which suite scored better so far?

GEPS seems to be more in the middle, so potentially best way to go until the ensembles line up.

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