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January 6-7 Storm Discussion: we’re due?


WxUSAF
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52 minutes ago, EastCoast NPZ said:

T - 2" in the Shen Valley

2 - 4" elevations > 1000 ft.

Areas to the East - good luck.

Mt. PSU could jack in the middle of the Sahara, so 6" for him.

My first and final calls.  Let's see how I do.

4” or bust in your backyard!

I have siblings in Front Royal, Stephens City, Clearbrook and kids in Leesburg and Aldie so I will get their updates.  

I will send you photos next week of the 50 “ plus expected here over the next 8 days

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6 minutes ago, WxUSAF said:

Snow depth is good to check against in marginal situations like this but I’m not sure I’ve ever seen actually accumulations that match snow depth forecasts. Even the December post-deluge changeover beat the snow depths by like a factor of 2.

     That's fair.    The depth field is underdone in events with warm ground going in, marginal temps, and good rates.     But it's a strong alternative to 10:1 maps when you have a lot of sleet (or other mix) or poor rates with marginal temps.     In events that argue for rates overcoming temps, a blend of the 10:1 and snow depth, with a solid lean towards the depth, often works well.  

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3 minutes ago, clskinsfan said:

I know you have been screwed a lot the past few years. But you are gonna get more than 4 at your new house. I will be completely shocked if I am wrong. These are the storms I promised you that your move would cash in on. 

I'm back in stephens city now.  My old place out in the Junction will probably do ok; I had 1,000' there and it was usually 3F colder than Winchester.  In the low-lands of Stephens City and it's odd UHI, I'm ****ed.  I was here for 10 years prior and I know exactly how these marginal events go.

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3 hours ago, psuhoffman said:

I AM GOING TO BE POSITIVE HERE

So don't miss it, and snow god's don't make me regret it

Something to keep an eye on... I wouldn't expect this per say, but if we are trying to be optimistic I see one thing today that leaves the door open somewhat for a better result NW of 95 here.  I am using the 3k NAM but I've noticed the same general trend in the euro its just a couple degrees warmer so not quite as close but going the same way

There has been a trend on the euro and NAM to weaken that inverted trough or trowal feature and allowing the developing coastal to develop a more closed circulation sooner.  This cools the column some compared to earlier runs.  

If you look close you can see that in the height fields here

GIF.thumb.gif.c9ec33bbeb659b5f5630dc25ce90c720.gif

The result is the column was VERY close to support snow during the most critical 3 hour period from 95 NW.

This was the 12z run...12z.thumb.png.5316e3ac523f06c5a3fd6d6764c2b6a5.png

That isn't really close in the yellow area.  Looking at soundings it was a pretty thick area of close to 2C above freezing in the mid levels.  
But look at 18z same time 

18z.thumb.png.d984d2a23794cf24b06639065627be7e.png

It's REALLY close to supporting snow.  I looked at soundings, 850 is about the warmest layer and its barely above freezing in this region.  One more move the same as this and it would be snow in this area.  

I didn't cherry pick this hour...it might even be colder the hour before and after if you look.

Before

before.thumb.png.dc03b0fd733ade9128be81fb6b19b49e.png

After

after.thumb.png.2ce8e43046627b9642ad47539441dbdd.png

  But this is in the middle of a 3 hour period where this area gets .3-.5 qpf.

nam-nest-md-precip_3hr_inch-4582000.thumb.png.4c2f554c725c0fa80742741fbfe65c50.png

If it were to be 1 degree colder that would mean a 3-4" thump in this area.  

It's possible, not likely but possible, that if this were to be just 1 degree colder than guidance thinks...suddenly if flips the other way in this area.  

The 18z Euro tries to do this at hr 54 but has a tiny warm layer just above 850 that screws it up 

Screenshot 2024-01-04 191233.png

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4 minutes ago, aldie 22 said:

I particularly love that little curve back in Loudoun to include my house into the blues 

And if this is the snow depth, I’ll take that 2”. Its enough to cover the ground and build a snowman with my daughter. Then when it flips, we go back inside and have a hot chocolate 

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7 minutes ago, Terpeast said:

And if this is the snow depth, I’ll take that 2”. Its enough to cover the ground and build a snowman with my daughter. Then when it flips, we go back inside and have a hot chocolate 

Here I will enjoy my 0.2" of snow even though I am further north than you and clear the drains and make sure the sump pump is ready for 2-4" of rain next week.  Then I will come in and enjoy iced tea with my son and daughter as well. 

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2 hours ago, nj2va said:

MLK 2022 was a top 5 favorite storm for me - the upslope was epic for ‘part 2’ of that.  Blizzard conditions at times.  IIRC, you were staying in Accident or close by and chased that event right?  The 500 energy that enhanced the upslope was textbook.  This is definitely not that, ha.

That storm was incredible, especially the upslope. I stayed in Accident and drove all the way to Timberline in some of the wildest blizzard conditions I’ve ever seen, and the skiing conditions felt so much like classic Northern New England. I think the final total was ~18”. I’d love for a repeat.

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57 minutes ago, WVclimo said:

Afternoon update from LWX bumped up HGR and MRB to 5-8”

DCC68C76-D7ED-4161-9531-D2B7E0915814.thumb.jpeg.5735fed4648e76f2537e44d2e9847487.jpeg

What is going on in Orange, VA? Why can't Cville get the peninsula of hope?

 

18z 3k NAM has this area under moderate/heavy sleet for 7-8 hrs Saturday.. I hope that's wrong

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38 minutes ago, Kevin Reilly said:

Here I will enjoy my 0.2" of snow even though I am further north than you and clear the drains and make sure the sump pump is ready for 2-4" of rain next week.  Then I will come in and enjoy iced tea with my son and daughter as well. 

I'm going to walk around in the rain, then come inside and drink grape kool-aid and smoke homegrown. 

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4 hours ago, NorthArlington101 said:

temps marginal and precip isn't super light... color me a bit skeptical as someone who lived in cville for 4 years and saw sig ice once despite it being modeled probably 3-4x a year.

Now on the Blue Ridge itself... yeah. This seems like the kind of storm that closes the Parkway for 3 weeks... especially when you factor in a follow up next tues

yeah living in that area for years, i am doubting the ice forecast - this isn't the right set up for it.  Up in the mountains a different story like you say.

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7 minutes ago, Clueless said:

 Agree. Time to post a Bingo card. Who has one?

Prob belongs in Banter, but I can suggest several spaces:

  • NAMd
  • Sun Angle
  • Will I be OK to drive to [insert place]
  • App Runner
  • Outlier ... Toss
  • [...] Pummeled! (will also accept Short Pump)
  • Snow hole
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