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Dec 9th Winter Threat


ORH_wxman

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Would something like that result in a freezing rain advisory?

 

Is it just for the hills or I would have ice issues in my area?

 

 

I think anyone away from the immediate coast owuld get icing for a time but the hills would def see the most prolonged icing (possible never flipping over to plain rain at all)

 

 

ZR advisory is issued for any amount of freezing rain.

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We weren't in it for an inch or two? That's really all I thought was reasonable.... But that even looks iffy.

Will enjoy the cold next week

 

Well if you were hoping for an inch or two I guess...but I'm referring to the overall look of this. It was always low confidence there imo.

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This sounds like a weenie comment, but in my mind...the NAM depiction for Monday makes a little more sense to me. I wouldn't be shocked if the GFS and Euro improve the depiction at 12z.

 

 

Typically - as you know -- the NAM has a NW bias, particularly over 48 hours out in time.  It's also usually the juiciest, too.  However, I was mentioning in the other thread the persistent nature of the west/SW Atlantic ridging, and that may argue a nod in favor of the NAM;   but it wouldn't atone for the wetness of the run. 

 

(It's also hard for me to imagine a scenario where the Euro kisses the NAM's butt)

 

I'm not sure what to make of that... The GFS is yet in with another cycle that takes a few pennies more worth of wealth out of the appeal account on this thing.  Seems if the trend were to go to its extent,  ... nothing would happen at all.  At this point, if the NAM were correct about tonight and the GFS for Monday, tonight becomes of the main player of these 4 days.

 

In the general overview we still have this big polar high coming in on the heals of tonight's wave so ... as that retreats NE, it will impose a bit of an isentropic wall for those strong mid level winds to climb over... It seems SOMEthing should evolve of that...

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Typically - as you know -- the NAM has a NW bias, particularly over 48 hours out in time.  It's also usually the juiciest, too.  However, I was mentioning in the other thread the persistent nature of the west/SW Atlantic ridging, and that may argue a nod in favor of the NAM;   but it wouldn't atone for the wetness of the run. 

 

(It's also hard for me to imagine a scenario where the Euro kisses the NAM's butt)

 

I'm not sure what to make of that... The GFS is yet in with another cycle that takes a few pennies more worth of wealth out of the appeal account on this thing.  Seems if the trend were to go to its extent,  ... nothing would happen at all.  At this point, if the NAM were correct about tonight and the GFS for Monday, tonight becomes of the main player of these 4 days.

 

In the general overview we still have this big polar high coming in on the heals of tonight's wave so ... as that retreats NE, it will impose a bit of an isentropic wall for those strong mid level winds to climb over... It seems SOMEthing should evolve of that...

 

I always thought that applied more to truly phased systems where that NW bias occurs with the NAM, we really don't have much of a surface or upper feature thats intense with this at 60 hours both models just show a weak surface feature of similar intensity off the VA coast yet the NAM has no problems breaking precipitation out up the coast while the GFS wants to do nothing, I said in the Philly thread last night even if the models still show nothing as late as tomorrow night I'm still probably going to forecast a 4-6 hour period of snow across NYC 02-08Z just based on past principle of these events alone...even if nothing accumulates it still screws most of my clients if snow falls. 

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I always thought that applied more to truly phased systems where that NW bias occurs with the NAM, we really don't have much of a surface or upper feature thats intense with this at 60 hours both models just show a weak surface feature of similar intensity off the VA coast yet the NAM has no problems breaking precipitation out up the coast while the GFS wants to do nothing, I said in the Philly thread last night even if the models still show nothing as late as tomorrow night I'm still probably going to forecast a 4-6 hour period of snow across NYC 02-08Z just based on past principle of these events alone...even if nothing accumulates it still screws most of my clients if snow falls. 

 

 

Yeah, that could certainly be the case re phasing ... I wasn't aware of any qualification on the matter.

 

In fact, searching the web ...does anyone know where the model biases are actually updating?   Kind of annoying, but it seems that NCEP is getting rather old.  One would think there is better on-going monitors.

 

Agreed, though, that this could be more of an isentropic lift event.

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The MA might actually do better than a chunk of SNE with the Monday system. It's much more organized down there.

 

The biggest problem I'm seeing is that the snow growth zone is barely saturated, and it gets worse the further north you go. Like SNE may do better than NNE because of that.

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The biggest problem I'm seeing is that the snow growth zone is barely saturated, and it gets worse the further north you go. Like SNE may do better than NNE because of that.

 

Soundings looked awful on BUFKIT.  Maybe it trends a bit wetter on future guidance...still have some time.

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Conceptually you would think that shot of WAA would be enough to saturate things. Still not looking all that impressive.

 

I'm starting to wonder if the models are perhaps because there is a surface low involved mistakenly viewing the high pressure area as a block rather than an enhancing mechanism for generating WAA precip.  When you look at the precip generated even in the MA region it all looks to be a product of the surface low as if the models have nothing being generated courtesy of the overrunning whatsoever and then the signal is basically to scoot all that precip OTS from south Jersey. 

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