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Dec 5-6th clipper threat


George001
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2 minutes ago, CoastalWx said:

NAM is dam snowy ORH county again. Kevin on the line, but does flip.

I think ORH county down to Kevin (or close to Kevin) are going to get a decent hit...thinking there will be a area of 4-6'' within that zone. SE of 84 still in line for at least mixing. Going to be a close call in the question mark spots...it may not take much to cool the sfc and just above given the precip rates.

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I know the SW wind is concerning, but outside of the coast, I think I would hedge towards the colder guidance. If we were climbing into the lower 40's tomorrow inland I think it would be concerning but highs generally look mid 30's. You look too southwest across PA/NJ...that don't get much warmer. So its not like the SW wind is advecting in higher temperatures. Even the llvl warmth is shunted towards SE areas.

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Just now, weatherwiz said:

I know the SW wind is concerning, but outside of the coast, I think I would hedge towards the colder guidance. If we were climbing into the lower 40's tomorrow inland I think it would be concerning but highs generally look mid 30's. You look too southwest across PA/NJ...that don't get much warmer. So its not like the SW wind is advecting in higher temperatures. Even the llvl warmth is shunted towards SE areas.

Winds are south initially then go SW and that’s probably when Kevin flips.

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Just now, Damage In Tolland said:

Am I raining?

You may have some rain early in but I’d expect you to flip to snow pretty quick if you do. If you avoid rain in the first 2-3 hours of the steady stuff, you’re good. The profile cools after about midnight or 06z. 

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3 minutes ago, HoarfrostHubb said:

You buy that much precip that the NAM is putting out?  I'm not worried about temps in my area... just the amount of water

Maybe not, but it’s unstable aloft and could really help to wring it out. Plus SW flow is good for you. I’d like to see more confidence in guidance as we still have some variability.

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19 minutes ago, ORH_wxman said:

3k actually has a pretty nice 2-3 hour burst of mod (perhaps briefly heavy) snow in eastern MA early Thursday. Metrowest could perhaps grab an inch or so during that if it verifies. 

I think my valley location here might not fair well, but Ginxy just to my SE with Elevation might see some accumulation along with the hills just to my NW into Pomfret/Hampton and Woodstock 

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Pretty decent ulvl divergence across the region and you have the nose of an increasing mlvl jet punching into the region along with a strengthening llvl flow (with core along/off the coast). Going to be some good moisture advection into the colder air coupled with enhanced lift from the divergence. We'll see how quickly this all blossoms but I like the NAM's idea of its wetness. 

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31 minutes ago, FXWX said:

Multiple levels of sw wind at that!

in fairness ...it's an unusual situation.  it's bit of a beautiful nick of timing thing.   if this ordeal hesitated for so much as a coffee break, we're +1c too warm all the way through the snow growth region of the sounding.  but as is, in the guidance, the speed of the flow is actually helping something for a change.  i mean this system overtakes the lower troposphere, which happens to be cold enough that there is a decently large drag coefficient and the system is overrunning it.  otherwise obviously the sw flow, sfc to aloft,   heh

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17 minutes ago, CoastalWx said:

I’ll sell the Reggie clowns here.

While I would remain cautious about some of increasing totals in this morning's short range guidance, there is a solid trend towards juicing this system up, as noted by Wiz... Probably going to be a 2-3 hour period of enhanced rates across parts of the region?

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