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NYC/Tri-State Area: Stumbling into January Disco


earthlight

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Attention grabbing headline, I guess they need to bring in some viewers as the weather has been incessantly boring.

There are some well known 'hypecasters' in this market and I have been thinking how are they going to deal with this weather. The NAM indicates no measurable precip. after this evenings showers. That is borderline irresponsible.

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Here's something noteworthy as we struggle through this pattern..

...RECORD ANNUAL PRECIPITATION SET AT NEWARK NJ...

A RECORD ANNUAL PRECIPITATION OF 69.91 INCHES WAS SET AT NEWARK NJ

IN THE YEAR 2011. THIS BREAKS THE OLD RECORD OF 65.50 INCHES SET IN

1983.

Looking at my weather station records this year, I find it impressive that 10/12 months were at or above normal temp wise. Only January and August finished colder than normal, and not by a significant amount. Both departures were in the -1 to -2 range. I finished Nov at +3 and December at +4.5. 2010 was also mostly warm, save for the winter.

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Some of the warmer temperatures on Tuesday will come earlier in the day and possibly in the earlier afternoon. The NAM has slowed the arctic front so that on Tuesday between 09 and 15z, 850 temperatures are still between 12 and 16c. That could support temperatures in the mid or upper 20's. But with strong northwesterly winds, I think upper 20's is a better bet for an afternoon high than the NWS OKX 32 F. They may be going with an early morning high, too...the NAM has 12z Tuesday temperatures very near 30 F in NYC.

I also agree about the low temperatures not being in the single digits in the city. It's a shame, but we can't hold this cold air at all. By early Wednesday morning the best cold air is already gone. But it will probably still be enough to get some interior locations into the single digits with clear skies, relatively calm winds, and 850 temperatures near -20 C.

The NAM only has 850s around -15C early Tuesday morning, but instability snow squalls should limit any solar heating that could occur in the dawn and early morning hours:

Wednesday morning looks plenty cold with 850mb temperatures around -17C, but of course the lack of snow cover in our region (and to the north) will limit the extremity of the cold. Looking at this map, however, I could definitely see stations in the farther suburbs, like DXR and SMQ, getting into the single digits. I think NYC will probably fall into the low-mid teens...if only we had snow cover:

A rare occurence though, -20c is much more routine. What was the last -30c intrusion down to our latitude? January 2004?

According to Plymouth reanalysis maps, 850s were around -25C in NYC metro during the heart of that outbreak....northern Vermont saw 850mb temperatures as cold as -35C, which is amazing:

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Don't look now, but if the GFS is right some very weak and transient high latitude support could team up with a west coast-rockies ridge to support the potential for something around the 9th and 10th of the month. A very small window for something, but something nevertheless. Worth almost nothing, but the DGEX has had a storm system at the end of it's runs (around 180 hrs) for the past few days and the GFS and Euro have had some weak signals around that time frame as well. Nothing to write home about yet, but worth watching especially in this boring pattern.

It would be a very tight window -- the ridge over the west collapses rapidly.

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It's this energy, which swings down over the ridge through the Western Plains and then towards the Gulf Coast, that we need to watch. It is currently modeled to be timed well with a northern stream feature and a re-enforcing shot of cold air. If we can get this feature to amplify, things could get interesting. That Western CONUS ridge would certainly support some amplification if it is well modeled.

f174.gif

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The NAM only has 850s around -15C early Tuesday morning, but instability snow squalls should limit any solar heating that could occur in the dawn and early morning hours:

Wednesday morning looks plenty cold with 850mb temperatures around -17C, but of course the lack of snow cover in our region (and to the north) will limit the extremity of the cold. Looking at this map, however, I could definitely see stations in the farther suburbs, like DXR and SMQ, getting into the single digits. I think NYC will probably fall into the low-mid teens...if only we had snow cover:

According to Plymouth reanalysis maps, 850s were around -25C in NYC metro during the heart of that outbreak....northern Vermont saw 850mb temperatures as cold as -35C, which is amazing:

I was actually skiing up in Killington during that outbreak. It was not warm out. They actually started shutting down the lifts the last day we were there, and at the top of one of the mountains (where there is the big lodge) it was like -40F. We got a quick hot chocolate up there (after taking the gondola up), skied down, nearly froze to death, and got the hell out of there. I remember driving back to VA later that day, and us getting back to Charlottesville with it 65 degrees warmer than the top of that mountain and still cold enough to be snowing.

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Some of the warmer temperatures on Tuesday will come earlier in the day and possibly in the earlier afternoon. The NAM has slowed the arctic front so that on Tuesday between 09 and 15z, 850 temperatures are still between 12 and 16c. That could support temperatures in the mid or upper 20's. But with strong northwesterly winds, I think upper 20's is a better bet for an afternoon high than the NWS OKX 32 F. They may be going with an early morning high, too...the NAM has 12z Tuesday temperatures very near 30 F in NYC.

I also agree about the low temperatures not being in the single digits in the city. It's a shame, but we can't hold this cold air at all. By early Wednesday morning the best cold air is already gone. But it will probably still be enough to get some interior locations into the single digits with clear skies, relatively calm winds, and 850 temperatures near -20 C.

I was thinking NYC would have shot to get down to single digits Tuesday night. But with flow more NW instead out of the North, I don't think see we this full brunt of this artic airmass. I think it's possible early highs around 30 degrees on Tuesday. Then again sometime late on Wednesday, even though we might get off to a lower start in the morning. This would keep our departures from going below -10, both days.

To add this the 6z NAM is warmer. On this run, 850mb temps don't go below -18C for anyone in this area. And warm up to around -14C by 12z Wed. It possible though, that its underestimating a cold a little bit:

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Don't look now, but if the GFS is right some very weak and transient high latitude support could team up with a west coast-rockies ridge to support the potential for something around the 9th and 10th of the month. A very small window for something, but something nevertheless. Worth almost nothing, but the DGEX has had a storm system at the end of it's runs (around 180 hrs) for the past few days and the GFS and Euro have had some weak signals around that time frame as well. Nothing to write home about yet, but worth watching especially in this boring pattern.

It would be a very tight window -- the ridge over the west collapses rapidly.

This is a longshot. But If we see that Iceland block trend stronger than this at 144hrs, and that ridge remain amplified over the West Coast, than we have a shot at a storm producing some appreciable snow during this 8-10th period:

It's not that far off the from setup we saw a day or so prior, to Jan 26-27 storm last year. Although, we were also coming out a stronger -NAO. So I don't expect something nearly as big:

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At the very least, there is some potential between Jan 8-15 as the North Pacific retrogrades and we feel the lingering effects of the GWO orbit. Then it will be the West's turn as the RNA / -EPO pattern potentially sets up. Finally, we may see a classic La Niña pattern Jan 15-20 setup.

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This is a longshot. But If we see that Iceland block trend stronger than this at 144hrs, and that ridge remain amplified over the West Coast, than we have a shot at a storm producing some appreciable snow during this 8-10th period:

It's not that far off the from setup we saw a day or so prior, to Jan 26-27 storm last year. Although, we were also coming out a stronger -NAO. So I don't expect something nearly as big:

Yeah I definitely agree...I thought it was important to note in my initial post that the window for something was very, very small. But it is definitely worth noticing in the pattern we've been in and it certainly caught my eye.

Todays 12z GFS has trended faster and more progressive with the northern stream, as well as the ridge out west. So the shortwave essentially never has time to amplify and there is a clear disconnect with the northern stream shortwave over the Great Lakes. So the storm winds up way offshore.

The 06z DGEX from this morning offered some more hope: http://www.meteo.psu.edu/~gadomski/DGEXEAST_6z/f180.gif

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Euro so far looks flat and unorganized in a similar fashion to the GFS. The potential remains, though, you can see the northern stream is just slightly disconnected while the main shortwave is trailing too far back to the south and west. Plenty of time to watch this one on the guidance.

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Euro so far looks flat and unorganized in a similar fashion to the GFS. The potential remains, though, you can see the northern stream is just slightly disconnected while the main shortwave is trailing too far back to the south and west. Plenty of time to watch this one on the guidance.

this run is suspect because it holds a cutoff low in texas and then it drifts over to Louisiana and waits for the next northern stream energy.

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