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March 21-23, 2023 | NE / Mid-Atlantic Winter Storm Speculation


Penn State

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As most of you know.. I rather enjoy a storm potential with some historical context. For our more seasoned folks from Pennsylvania, Maryland, and New Jersey on this forum, they may remember March of 1958. According to Arcfield Weather, A strong winter storm intensified off the Mid-Atlantic coast and slowly advanced northward; resulting in a long-duration, high impact event. As a matter of fact, parts of eastern Pennsylvania received record snowfall totals. Lancaster recorded 34”.. and Morgantown recorded a staggering 50” of snow. An article from the Washington Post indicated that temperatures during the event were slightly above freezing.. which makes such high snowfall totals even more impressive; yet reasonable, considering that between 3-5” of liquid precipitation was recorded for the event in high impact areas. A YouTube video was created that highlights images, video, and some commentary from this historic event. So, what does this impactful winter storm from Match of 1958 have to do with this upcoming March 21st-23rd? It just so happens that it’s the #3 analog for this timeframe according to NOAA’s Climate Prediction Center (CPC) 

Now.. This analog is far from an endorsement of this speculative winter storm threat. History is sure to repeat itself someday, but there’s no evidence to suggest an event as impactful as that fateful storm in March of 1958. The justification for this winter storm is evident on the ensemble forecasts of the GEFS, EPS, and CMCE; the most aggressive of which is the EPS at the present time. In terms of the operational models, each has a storm; however, the ECMWF looks the most intense and is furthest west with the storm track. The GFS is furthest east, and the GDPS is the weakest. If you look at the ECMWF 500mb (In the spoiler) it sure looks close to a triple phase..🧐😳 In terms of teleconnections, the MJO is screaming potential; however with the exception of a favorable NAO, the AO and PNA look unfavorable during this timeframe. 

So.. the credit for this thread goes to.. @JDClapper who proclaimed that I scare the storms away 😱🫣😂. I mean.. it’s hard to argue against that notion lol, but I refuse to give up! 

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Happy Tracking! 🤓

12z Ensemble Comparison | Hour 192

EnsembleComparison(192).gif.a55cff05c28c2aee161a157e8be2ddda.gif

12z ECMWF | Hours 156-228

12zECMWF.gif.e1cefed4dcb3c4c47bfef09be9f25c43.gif

#3 Analog | March 18-21, 1958

03938557-C1BD-46BB-9AD5-C679FC837887.thumb.jpeg.6dc04a9650fd9df081a5d5582a59fda1.jpeg

Spoiler

12z Operational Model Guidance | Hours 156-228

GFS

12zGFS.gif.325b1012756ab9b0a07a7fc7df0f09c5.gif

ECMWF

12zECMWF.gif.e1cefed4dcb3c4c47bfef09be9f25c43.gif

GDPS

12zGDPS.gif.d60abb84a5f457ef9a52c4f9c6eb460e.gif

12z 500 MB Guidance | Hours 156-228

GFS

GFS500.gif.1bbe959ecb965e5bebeae1109eee800d.gif

ECMWF

ECMWF500.gif.5652c9a638b8c8b6515c751613568530.gif

GDPS

GDPS500.gif.eeb3eaaf04a8e685772c11eab4ba771e.gif

12z Ensemble Guidance | Hours 156-228

GEFS

12zGEFS.gif.1bec776d3f3301aadd7340385a261e0d.gif

EPS

12zEPS.gif.64b5f0100d7a831de18f091cac0c00cb.gif

CMCE

12zCMCE.gif.db1e6ca6896d6a48b74b75d516503c92.gif

Teleconnections 

MJO

E41E7E62-0F13-4757-AB8A-ACAA8CDD9C2E.thumb.png.a66aefbabb6ff24eb72f2e28ee29652e.png

AO

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NAO

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PNA

CFA42914-B19C-48C7-B56D-38AAFD6CA399.thumb.png.b077dc23019bbff74a82ac6356a200f8.png

Analog | March 18-21, 1958

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03938557-C1BD-46BB-9AD5-C679FC837887.thumb.jpeg.6dc04a9650fd9df081a5d5582a59fda1.jpeg
 

 

Edited by Penn State
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18 minutes ago, JDClapper said:

Nooooo! Why PennState, whyyyyyy? 

Lol

How sad that things looks so loaded with potential every week, at this time of the year. But hey, lets gooooo!

Oh.. It was on after you posted that. I was on the fence, and then I was like.. I'm doing it! 🤣 There is a lot of potential rolling around, and my more successful threads are usually ones that have a historical tie-in. This one does, which I'll mention when I have time for the write-up, but it's a March 1958 storm.. it's the one that dumped 50" on Morgantown, PA. The operational look has a similar look to the old maps too. It's pretty cool, and would love to see history repeat. 

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^^ This lol throwing me off at work too.

Anyway still far out but im not liking the backing up of the southern energy. What has been steady though is the trough exiting the mountains that is a bit worrisome. Maybe steps toward a Euro like outcome?

gfs_z500_mslp_namer_fh198_trend.gif

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There’s sone changes going on being this is so far out. 
 

last nights Gmao loads up for what I can only explain as a season finale on the 25th 

F713CF60-02AD-4210-8785-AE45390C1055.thumb.png.6a0fcb23f84dd368d22c764e50fb5bf9.png

it basically skips the 21-23 period and holds back to put itself in harmony with the next nothern surge.  I still don’t know the verification on this model but from watching it I must say it has been leading the way operationally quite often.  So I wouldn’t be Surprised if we shift this back a couple days as Tylor mentioned the trend has been to hold back the southern stream, gmao just seems to be ahead of the trend 

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1 hour ago, Poco said:

There’s sone changes going on being this is so far out. 
 

last nights Gmao loads up for what I can only explain as a season finale on the 25th 

F713CF60-02AD-4210-8785-AE45390C1055.thumb.png.6a0fcb23f84dd368d22c764e50fb5bf9.png

it basically skips the 21-23 period and holds back to put itself in harmony with the next nothern surge.  I still don’t know the verification on this model but from watching it I must say it has been leading the way operationally quite often.  So I wouldn’t be Surprised if we shift this back a couple days as Tylor mentioned the trend has been to hold back the southern stream, gmao just seems to be ahead of the trend 

Yea im starting to think that is the more likely timeframe for something. Euro was even pointing that out, just wayyy too much confluence going on and flat ridging across the western Atlantic doesn't help amplify the shortwave for this timeframe, by 12z tomorrow we start the less than 120 hours routine before storm formation. Could this change sure can but would like to see that resolved in the next 2-3 days if we were to get an early system, could pave the way for a southern Mid Atlantic storm? wouldn't that be something if VA and NC end up with more snow lol. The 24th-26th opens up the possibility with much more ridging potential in eastern Canada only thing would be is lack of cold but again super far away. Maybe we can come to a nice middle ground this may be a little bit easier for models to read if something does take hold with the lack of northerly energy getting intertwined. 

Will watch but I have been ready to call this winter already lol less than 1 inch is quite the year to say the least.

Edited by so_whats_happening
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1 hour ago, StretchCT said:

Why not go back to the playbook since it worked so many times recently.  How about a would be cutter headed to the lakes that gets blocked and reforms off the coast.

floop-gdps-2023031512.prateptype-imp.conus.gif.7f63ec1055e2a80157f8ad38afc1370c.gif

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yup

Edited by Poco
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5 hours ago, StretchCT said:

Why not go back to the playbook since it worked so many times recently.  How about a would be cutter headed to the lakes that gets blocked and reforms off the coast.

floop-gdps-2023031512.prateptype-imp.conus.gif.7f63ec1055e2a80157f8ad38afc1370c.gif

Would surely fit the them this year

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