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2-1-15 to 2-2-15 Snow and Mix to Snow Storm


Clinch Leatherwood

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if this thing is coming this close against the arctic air there should be some convective snow and sleet right??

 

 

It's going to help cause a bent mid-level warm front with all that juice slamming into the arctic dome...it's evident at 850mb in N CT/N RI on all guidance (though Euro was a little south)...just north of that should have some very intense rates for a time as the mass convergence there at 850-900mb will cause great upward motion in that 600-750mb region just north of it.

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Scott what are you thoughts on down here? Do we rain? Do we still have a chance of 6-8

Sleet yes.  Freezing Rain/Rain are looking quite possible as well now looking at 12z runs.  NAM looked the best for TAN with basically an isothermal snow event but marginal at best.  RGEM was about 50/50 snow/rain here.  GFS was really warm too after 15z Monday.  Snow before, and rain after that timeframe.

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Mets .. You think any bumps colder are possible ? Like Euro scenario? Or is the goose cooked?

 

 

Sure, a wobble colder or warmer is possible..I doubt any major changes now this close in, but it wouldn't shock me if it wobbled colder in the last set of runs tonight. Wouldn't shock me either if it wobbled slightly warmer.

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Some of these so called warm ticks are also the model looking a bit faster. For instance although a model like the Canadian seemed warmer at the 18z time on Monday, the low is also a bit further ENE than what was modeled on the 00z run. Don't forget as the low approaches so does the warmer air so it makes sense. You can also see how at the same time, it's colder in NJ. Faster low. So, don't obsess too much because you can't see every hour of every model and a lot of things happen in between every 3 hrs. I'm not saying it didn't tick slightly warmer, but keep that in mind. It's never easy to compare snapshots.

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Some of these so called warm ticks are also the model looking a bit faster. For instance although a model like the Canadian seemed warmer at the 18z time on Monday, the low is also a bit further ENE than what was modeled on the 00z run. Don't forget as the low approaches so does the warmer air so it makes sense. You can also see how at the same time, it's colder in NJ. Faster low. So, don't obsess too much because you can see every hour of every model and a lot of things happen in between every 3 hrs. I'm not saying it didn't tick slightly warmer, but keep that in mind. It's never easy to compare snapshots.

 

 

Yeah fast timing will make it look a bit warmer than it really is versus previous run. You can also see more QPF...so more front end has happened by that point.

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Sure, a wobble colder or warmer is possible..I doubt any major changes now this close in, but it wouldn't shock me if it wobbled colder in the last set of runs tonight. Wouldn't shock me either if it wobbled slightly warmer.

It's all within the noise level at this point. Those 20 mile burps here and there seem fairly normal.

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The GFS has a bit of elevated instability late tomorrow aftn assoc with the dryslot. However the final band of snow may be a bit convective in nature with heavier bursts. It shows up as elevated CAPE with higher RH.

I'm thinking we could see the "dippin' dots" as we get those marginal warm layers in there along with the instability...like a sleet mix transitioning to dippin dots and then a burst of snow.

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I'm thinking we could see the "dippin' dots" as we get those marginal warm layers in there along with the instability...like a sleet mix transitioning to dippin dots and then a burst of snow.

 

Yeah I could see that. It's gonna be fun too when Boston drops from like 30-12 in about 40 minutes. Should be some snows with that too.

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Yeah I could see that. It's gonna be fun too when Boston drops from like 30-12 in about 40 minutes. Should be some snows with that too.

Yeah that's going to be interesting. Obviously the sleet and dippin dots will only occur where the warm layer gets far enough north...otherwise ya just varying types of snow. Questionable whether that warm layer reaches the pike or not of course.

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