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Jan 20/21 Snow Threat


snowNH

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My question is with 3 days of almost persistent light snows coming up, why's everyone talking about the buzz kill of early next week? So be it if everything ends up melting, nothing you can do about it. Just take the snow the next few days and pile it in the north facing corners of the house. And just enjoy the next 72 hours which will be a treasure in these types of winters.

CT. Blizz torch, blah, ct blzz 50, snow etc blah blah blah

:blahblah:

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My question is with 3 days of almost persistent light snows coming up, why's everyone talking about the buzz kill of early next week? So be it if everything ends up melting, nothing you can do about it. Just take the snow the next few days and pile it in the north facing corners of the house. And just enjoy the next 72 hours which will be a treasure in these types of winters.

Exactly possibly I have 5-7 of pure fluff to trail the hill with.

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I'd be pretty surprised if the slow north trend didn't commence around 0Z. I don't see what would suppress it with no blocking... Probably still fine for most of SNE...maybe except south coast and Cape, etc.

NAM looks like a decent 3-5 kind of deal on Saturday. A little fluff with good dendritic growth/cold atmosphere.

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all the overnight runs were really cold. nice to see.

euro is about .45-.55" out here...basically all of which would be frozen on that run. we'll see how things evolve.

I do like what I've seen as well. NAM continued cold as well. Hopefully we can see some stabilization in the models(if we have not already) and and changes are just noise.

Once argument to make on the southerly solutions are the downward trends in the AO/NAO on the models. Hope they're correct.

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I'd be pretty surprised if the slow north trend didn't commence around 0Z. I don't see what would suppress it with no blocking... Probably still fine for most of SNE...maybe except south coast and Cape, etc.

It's possible. But the latest guidance shows a very weak mid-level shortwave. In this regard this scenario differs somewhat from previous storms. The dynamics are limited. This is primarily light isentropic lift, and the QPF is driven by the magnitude of thermal gradient. Surface development currently looks weak and suppressed to the south.

The sheared out shortwave actually appears to lag in the Tn Valley into day 3, esp on the NAM. I wonder if the QPF with the initial wave could be overdone or if conversely the waves might ultimately be more consolidated with the thermal boundary further north.

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12z GFS is rolling in colder than the 06z run (which seemed a touch milder than 00z i think)

it has snow well down into the mid-atlantic

Well the longer it stays south on guidance, its definitely better for the southern areas over to your area. I still think it comes back north before we get to verification, but keping it south longer will certainly limit how much it could come back north.

I've noticed on the more southerly riuns, the vortmax is really weak coming out of the rockies. We should hae a better idea on that energy as it comes ashore tonight at 00z...still offshore for this 12z suite.

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If it snows every couple of days who cares if it melts in between aside of snowpack weirdos

Take it and be happy.

When you live in a place that can hold snowpack fairly well..you always get upset when it metls.

When you live in an area that 1) doesn't snow much and 2) doesn't hold snowpack when it does snow..you don't care

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Well the longer it stays south on guidance, its definitely better for the southern areas over to your area. I still think it comes back north before we get to verification, but keping it south longer will certainly limit how much it could come back north.

I've noticed on the more southerly riuns, the vortmax is really weak coming out of the rockies. We should hae a better idea on that energy as it comes ashore tonight at 00z...still offshore for this 12z suite.

yeah almost doesn't even qualify as one. it's all sheared / stretched as it runs out into the flow over the plains. the northern stream is pretty active which helps keep this supressed.

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It's possible. But the latest guidance shows a very weak mid-level shortwave. In this regard this scenario differs somewhat from previous storms. The dynamics are limited. This is primarily light isentropic lift, and the QPF is driven by the magnitude of thermal gradient. Surface development currently looks weak and suppressed to the south.

The sheared out shortwave actually appears to lag in the Tn Valley into day 3, esp on the NAM. I wonder if the QPF with the initial wave could be overdone or if conversely the waves might ultimately be more consolidated with the thermal boundary further north.

would this be similiar to a situation where the models have trouble resolving mutiple waves along a front? usually it turns into one major event / wave and the second is more muted (or vice versa)

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yeah almost doesn't even qualify as one. it's all sheared / stretched as it runs out into the flow over the plains. the northern stream is pretty active which helps keep this supressed.

The weaker that s/w is coming out of the rockies...the less moisture this system will have. It could end up as a 1-3" fluff job in the end if it stays really weak...it can't tap into any southern moisture otherwise and the frontogenesis will be weaker too with a sheared system. Hopefully we see it trend stronger to juice the system up again, but not so strong that everyone is worrying about ptype.

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