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NYC/Tri-State Area: Stumbling into January Disco


earthlight

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not bad... it's saturated through the snow growth region and it appears there is a small amount of ascent down to the 600 mb level, where temps are close to -15 or so... borderlineish... it looks like the strongest ascent is a little bit higher at about the 500-550 mb level. The lowest levels dry out just a tad, but not like some of the virga events in the last few weeks

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well, so much for that 6Z snow threat on the 12Z GFS.. dissapeared.. that shortwave pretty much just sheared out and died.

Its pretty funny. Every single shortwave so far this year has amplified and moved way north of where modeled, 3-4 days before.

And this one will not.

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The GFS has a tendecy to over amplify these weak waves.. and it had no support from ensembles. No surprise about this particular storm.

Its pretty funny. Every single shortwave so far this year has amplified and moved way north of where modeled, 3-4 days before.

And this one will not.

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how's the rest of the run- is it still cold from day 7 on - or whatever the 06z said?

it is still cold..it has a longwave ridge-west, trough east pattern... very long wavelength though... the set-up does look somewhat interesting.. if we can sharpen the wavelength a bit, it would be pretty good actually, because the troughiness doesn't move out so quick this time around... we'd need a massive piece of energy to dive south on that thing

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12z GFS looks interesting. After the cutter clears out a cold air mass arrives in its wake. Nice strong ridge out west and lots of energy diving down the backside of the trough. If the shortwave could dive far enough south and amplify the trough would have some time to go negative and maybe pop something of interest for next weekend. The progressiveness is definitely slowed down and the overall H5 depiction is more favorable. Plenty of cold air. At least worth keeping an eye on. At the very minimum the pattern appears to be looking better after the first storm.

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PV looks like it's in an unfavorable position.. seems like it would need to move further south west.. no way anything can go negatively tilted and close off with that quick flow up the atlantic coast

Very much in agreement with your thoughts. It will be interesting though, something might pop down the road this run, especially if the PV is displaced a bit S and W.

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PV looks like it's in an unfavorable position.. seems like it would need to move further south west.. no way anything can go negatively tilted and close off with that quick flow up the atlantic coast

But can still support light snow events. Let's just hope the models have a clue because days 6-15+ look very cold for us.

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12z GFS looks interesting. After the cutter clears out a cold air mass arrives in its wake. Nice strong ridge out west and lots of energy diving down the backside of the trough. If the shortwave could dive far enough south and amplify the trough would have some time to go negative and maybe pop something of interest for next weekend. The progressiveness is definitely slowed down and the overall H5 depiction is more favorable. Plenty of cold air. At least worth keeping an eye on. At the very minimum the pattern appears to be looking better after the first storm.

PV looks like it's in an unfavorable position.. seems like it would need to move further south west.. no way anything can go negatively tilted and close off with that quick flow up the atlantic coast

The earlier that cutter phases, the more the PV and baroclinic zone will setup further SW.

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Heights really start to rise over Greenland and the pole after the big cutter....I think we finally see some change during that timeframe

they rise because of the cutter over greenland, the pole warming has been going on for a little bit.

Problem is, vortex comes back stronger than ever at the end of the gfs and its ensembles but we seem to stay cold because we are ok over the pac

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they rise because of the cutter over greenland, the pole warming has been going on for a little bit.

Problem is, vortex comes back stronger than ever at the end of the gfs and its ensembles but we seem to stay cold because we are ok over the pac

I think the encouraging signs day 5-10 are more important than the return to usual that the gfs shows. If the changes in the more immediate future are true, that bodes well for the long range. We have seen several times this winter the models hint at large improvements post day ten, but never come to fruition.

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If we still have a massive vortex in Alaska, and/or a vortex over Greenland/Baffin Bay, we won't have any significant snow events, maybe even snow at all besides very minor events. It's almost a guarantee. If we see models try to develop any kind of a snowstorm or winter wx event with those in place, it should go right in the trash. I have some hope for later this month regarding the stratospheric warming event, but until some reflection appears on the 500mb chart and the vortexes near the pole and Greenland dislodge, it's hard to really have any faith in this pattern.

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