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Feb 8th-9th Potential Blizzard


dryslot

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It looks like I picked a good time to make a roadtrip to Marlboro MASS, after seeing 00z EURO not sure if I will be able to sleep. Theres another americanwx brah who is trying to make it up here, but if he can't come I leave it open to anyone who wants to stay.

 

EURO looks absolutely epic! 

 

 

Philly?

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Anyone have an educated opinion/guess at snow ratios at the height of this storm?

For ORH we're looking at 15-20F surface temps Friday night into Saturday morning.

This would ROUGHLY translate to 20:1 ratios. What's more realistic, 15:1?

there more important factors then surface temp for ratio's.

 

I heard there maybe a warmer toungue around 700mb but not sure about ratio's for this.

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I hope this comes to fruition for y'all.  I was out plowing in the Boxing Day storm in Coastal NJ.  Was in the 32"-34" bullseye...all in 14-16 hours.  Rates of 4+"/hr along with thundersnow.  Just an incredible experience, y'all have something magical to look forward to.  And this looks like it could go well beyond that locally.  Safety first for the storm chasers, it's no joking matter being out in those conditions, especially on unfamiliar roads.  The NWS warnings often get scoffed at, "bring blankets, etc.", but they are not kidding.  

 

Hopefully this time tomorrow nite we'll be watching the Radar with incoming precipitation (at least down this way, maybe a few hours longer for y'all). 

 

And go Patriots!  :)

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I don't think he understood you were speaking rhetorically John. Storm of the century. Hard to not be excited. One question. Seeing some of the über high res stuff. Is there any chance this wraps up so fast it ends up off jersey instead of cape cod?

 

I've been entertaining that chance - yeah.  Not ready to post, but... this has got meso contamination issues, and sometimes, the end end result of that is just where the best thermal gradient axis is. I was just looking at the Euro's vorticity fields and comparing to the position at 48 hours, and the low is situated oddly S of the best geostrophic forcing - even it could be suffering some c feedback. 

 

I'd go with the 00z NAM honestly, and bide time and be ready to pull the trigger against when it gets more obvious.  But I don't think it will.. I don't know if that means Jersey but a compromise between that and the NAM might be okay.  

 

I just don't like it when a thunderstorm 200 mile NE of Cape Hat dictates low positions.  

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I don't think he understood you were speaking rhetorically John.

 

Yeah, that wasn't exactly clear.

 

Oh, and that 6 hr period there that wxsniss posted is pretty amazing. That would certainly be an incredible six hour period for virtually anywhere, let alone a major city/metropolitan area like Boston.

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I've been entertaining that chance - yeah.  Not ready to post, but... this has got meso contamination issues, and sometimes, the end end result of that is just where the best thermal gradient axis is. I was just looking at the Euro's vorticity fields and comparing to the position at 48 hours, and the low is situated oddly S of the best geostrophic forcing - even it could be suffering some c feedback. 

 

I'd go with the 00z NAM honestly, and bide time and be ready to pull the trigger against when it gets more obvious.  But I don't think it will.. I don't know if that means Jersey but a compromise between that and the NAM might be okay.  

 

I just don't like it when a thunderstorm 200 mile NE of Cape Hat dictates low positions.  

I think it starts pretty early too, Ie there are signs of potential contamination in the next 24 hours. Going to be a fluid situation. I'm just wondering what would stop a runaway train of it developing left.

We saw the result with the ukmet when it picked a random complex too Far East and zipped out to the east.

Will's 4km runs the low almost or onto the cape.

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the other thing... let's talk ratios;   at 20:1, 2.2" ...um, 44"?  come on?     Maybe compaction - even at 20:1, weight starts to compress at some point - wow.

This is very true. During PD II we had about 25" I witnessed and heard as the snows weight compacted at least 4" soon after the major snow fell. It was pretty cool though. At higher ratios 30" might stay stable but 15:1 I doubt it.

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had similar concern Rollo... I actually just asked BI in the NYC thread

 

he mentioned the 4km NAM and EC superior handling of convection... not sure which of the 2 is better because they have pretty different outcomes

 

my guess is to lean EC given it's incredible consistency, but i'm not sure

 

here's the 0z hi-res Nam solution, quite a bit deeper and closer, and could raise more taint issues than we're currently thinking:

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