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Jan. 15-17th, 2024 | NE/MidAtl Winter Storm


MaineJay

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Just now, Rickrd said:

God. Don’t know what my problem is today. Sry. 

It happens when all these runs are updating during the same time period.

 

Back in the Accuweather forum days, I would post these maps at breakneck speed and make these same "previous run" posts 🙂

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1 hour ago, Snowadelphia said:

For I-95 folks - I’m going out to buy rock salt today. Apologies in advance. 

Mine is still sitting on the porch from last year. Actually ice melt. 

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Just now, cperry29 said:

Here’s a peek at 6z… can’t save loops on Navy site…

Heres the link if anyone wants it…

https://www.fnmoc.navy.mil/wxmap_cgi/cgi-bin/wxmap_single.cgi?area=nvg_namer&dtg=2024011206&prod=prp&tau=102&set=All

 

IMG_1799.gif

Yes - and don't worry if your PC/Phone or whatever initially rejects do to "security credentials" 

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2 minutes ago, RobB said:

It happens when all these runs are updating during the same time period.

 

Back in the Accuweather forum days, I would post these maps at breakneck speed and make these same "previous run" posts 🙂

Same. I try to “double check” my work before anyone sees it 😂

 

Just now, Undertakerson2.0 said:

Yes - and don't worry if your PC/Phone or whatever initially rejects do to "security credentials" 

Yes! It’s not a user friendly site for sure, especially on a phone with fat fingers. 

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I've been looking at this one all wrong.  Focused on the LP that comes out of the GOM and going out to sea.  There's no support for that on the latest runs.  GFS is saying that the shortwave below is forming a new low.  

Screenshot2024-01-12at11_31_27AM.thumb.png.052c56a261abc3f2dc22f597e80afe01.png

You can see if on the pivotal loop - that kinks in the 522 and 525 height line goes negative and voila a storm is formed.  This is textbook.  

floop-gfs-2024011212.500hv.conus.thumb.gif.2fcf793a9e661bbb8cf602b6c35dae21.gif

 

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5 minutes ago, StretchCT said:

There's no support for that on the latest runs. 

What I mean by this is there's nothing at 850mb or 750mb that shows any organized system.  Yeah, some thunderstorms, but nothing really bending the height lines. 

image.thumb.gif.313c465a1fb887f76763270f433cc243.gif

There's just no upper air support to capture or organize the energy at these levels, so it just continues with the flow. 

floop-gfs-2024011212.850hvv.conus.gif.bdcbe1bf78af4bc344a2a0fccebbf2b6.gif

You do see what happens on the last frame of the 850 chart that the support from the aforementioned shortwave at 500mb and the longwave is coming in to capture some of that energy and send it north.

Edited by StretchCT
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2 minutes ago, StretchCT said:

You do see what happens on the last frame of the 850 chart that the support from the aforementioned shortwave at 500mb and the longwave is coming in to capture some of that energy and send it north.

But most of the energy at 850 in this frame (over the cape) is from the actual shortwave system.

Screenshot2024-01-12at11_42_56AM.thumb.png.aa043a055ab935a001e4f815472c719c.png

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Note that we are very near the 3 day crap the bed time for the models.

And i know that i am the king of oversimplification, but either we are in the midst of a minny pattern change , or we’re not. The long , long term pattern does not support what models are saying today. Just sayin.

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5 minutes ago, StretchCT said:

But most of the energy at 850 in this frame (over the cape) is from the actual shortwave system.

And in looking at the temp gradient at the surface and 925, any new storm would want to be around where theres the biggest difference, which is off of NC

Screenshot2024-01-12at11_48_20AM.thumb.png.ae7d68010cb18076788c10873973a169.pngimage.thumb.png.894c032e211ac664360c647fa795fcc5.png

 

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27 minutes ago, StretchCT said:

I've been looking at this one all wrong.  Focused on the LP that comes out of the GOM and going out to sea.  There's no support for that on the latest runs.  GFS is saying that the shortwave below is forming a new low.  

Screenshot2024-01-12at11_31_27AM.thumb.png.052c56a261abc3f2dc22f597e80afe01.png

You can see if on the pivotal loop - that kinks in the 522 and 525 height line goes negative and voila a storm is formed.  This is textbook.  

floop-gfs-2024011212.500hv.conus.thumb.gif.2fcf793a9e661bbb8cf602b6c35dae21.gif

 

And you can see that GFS shears out the trough creating two distinct s/w energies by the time it gets to the EC…we need that to stay consolidated, deep, and allowed to go negative…

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3 minutes ago, telejunkie said:

And you can see that GFS shears out the trough creating two distinct s/w energies by the time it gets to the EC…we need that to stay consolidated, deep, and allowed to go negative…

Yes, for a big storm. Right now the CMC is trying to do that, thought the shortwave in the GFS analysis is handled differently, it still goes boom once it phases in. It just a little late on the CMC.  But at least the CMC captures some of the southern energy. 

And there's time for that energy to consolidate.  I didn't walk back the sampling yet, but I don't think anything is onshore.  

Edited by StretchCT
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Hr 114 comparisons of GFS vs. CMC. The secondary bundle (seen here in the southern Mississippi river valley region) seemingly acts as a tug, holding our primary s/w from going negative on the 12z GFS

ScreenShot2024-01-12at12_17_04PM.thumb.png.f81900cc93a022a3391a7453e40e3039.png

CMC doesn't emphasize the split bundle concept as much and trough can go negative faster...devil is in the detail

ScreenShot2024-01-12at12_17_24PM.thumb.png.7c12b44a58c58d74b24b9daf7e0d799f.png

Obvious differences over top at play here too...someone else can lean into that though

Edited by telejunkie
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34 minutes ago, StretchCT said:

And in looking at the temp gradient at the surface and 925, any new storm would want to be around where theres the biggest difference, which is off of NC

Screenshot2024-01-12at11_48_20AM.thumb.png.ae7d68010cb18076788c10873973a169.pngimage.thumb.png.894c032e211ac664360c647fa795fcc5.png

 

And this is also where the WPC thinks it should be.

Screenshot2024-01-12at12_25_33PM.thumb.png.6a82f1a47bacfaceed422cf2289c14fb.png

Screenshot2024-01-12at12_27_04PM.png.9b94088c284fb6493e07f3fbfad8de8d.png

Screenshot2024-01-12at12_29_20PM.thumb.png.cefe505571f6656b9f04977be0ea5f68.png

Edited by StretchCT
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I have a feeling that after today's midwest storm departs, models will have a better handle (for better or for worse). I'll take solutions more serious beginning tomorrow 12Z (I feel like I'm channeling Snobal a bit with this post LOL)

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3 minutes ago, TheComet said:

I have a feeling that after today's midwest storm departs, models will have a better handle (for better or for worse). I'll take solutions more serious beginning tomorrow 12Z (I feel like I'm channeling Snobal a bit with this post LOL)

When you have a low pressure bomb like that going through first, especially with this crazy setup, tomorrow was always the focus day, and hate to say it, but with models it may be Sunday. Sure seems as if we have to know the final resting place of low bomb first.

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2 minutes ago, Undertakerson2.0 said:

Recent

Most are in the greens, a large number in the Dk Greens. Not a bad place at D3+ image.thumb.png.2f432038325b18c0d5817bbaa40e96a8.png

3-4 inches with ZERO Rain trailing behind it is a win in my book for Snow.

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Wondering if models are really struggling partly cuz of effects on very strong El Nino . Back in the day, a really strong storm like tonight’s would tend to wring out the atmosphere ( not always, but many times)for any storm following fairly close on its heels. Not this year! 
Or, i could just be full of shit, but i just obtained Rising Star status and have no idea wtf that means. Probably a quantity vs quality thang, but no pissing on my Wheaties. I shall carry that small victory right under my wings into Happy Hour. Carry on!

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