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December Medium/ Long Range


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3 minutes ago, yoda said:

So... day 8 to 10 on the 00z CMC :ph34r:

Would be nice if we could continue tracking through Christmas after our almost guaranteed fail next week. 

I’m heading on a family (not my ideal date timeline) vacation for the 2nd week of January, so need to score before then. Last time I went on vacation was the Jan 3/4th 2022 snowstorm… still annnoyed about that one. 

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2 minutes ago, CAPE said:

Way out there, but the 0z EPS and GEFS have a coastal low signal a few days before Christmas.

Not speaking about this specifically, but it’s crazy to me how Nino-like the pattern is in 10-14 days according to the ensembles.

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1 hour ago, WxUSAF said:

Not speaking about this specifically, but it’s crazy to me how Nino-like the pattern is in 10-14 days according to the ensembles.

A couple of things.... 1.  Isn't that the hallmark of neutral conditions... 2. Or is it that the overall basin of the Pacific is that warm due to climate change...

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1 hour ago, Kevin Reilly said:

A couple of things.... 1.  Isn't that the hallmark of neutral conditions... 2. Or is it that the overall basin of the Pacific is that warm due to climate change...

Not sure it’s either. I think it’s just subseasonal forcing like the MJO combining with factors like the warm water in the west Pacific producing this sort of look. 

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29 minutes ago, WxUSAF said:

Not sure it’s either. I think it’s just subseasonal forcing like the MJO combining with factors like the warm water in the west Pacific producing this sort of look. 

Yeah, research by Webb showed that correlation a couple weeks ago. Study showed it appeared to augment a + TNH.

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3 minutes ago, Daniel Boone said:

Yeah, research by Webb showed that correlation a couple weeks ago. Study showed it appeared to augment a + TNH.

The looks D10-15 on the ensembles are not really +TNH, they look very much like a mod-strong Nino climo. But the extended progs all evolve that to a +TNH look into the end of the month and December. That would fit more with the background forcing

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2 minutes ago, WxUSAF said:

The looks D10-15 on the ensembles are not really +TNH, they look very much like a mod-strong Nino climo. But the extended progs all evolve that to a +TNH look into the end of the month and December. That would fit more with the background forcing

  True. The Nino look is a bit of a Puzzle. The Study did find that the Nina augmented Pac Ridge is shunted Eastward toward the GOA with the Pattern so, that would allow for possible Aleutian LP Development. As we know, typically you get that in a Nino. 

     As far as a STJ , the Nina is weak so we should have that to work with some but, not a formidable one like in a Nino. This Winter just may be one of the odd out, off kilter One's that causes alot of busted Forecasts. 

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1 hour ago, Blizzard of 93 said:

 

An improved pattern should be setting up a few days before Christmas if the EPS & GEFS are on the right track.

IMG_7836.png

IMG_7837.png

Annual Christmas period warm up may not happen this year. Would break tradition going back many years. 

Most encouraging is the pattern forecased later month, but even more is not seeing the rapid rise in the AO and snow cover is not going to be eroded in the source regions such as in years past.  

ims2024341_usa.gif.7b0811c1a043321792330c6e76e662e4.gif1386939477_ao_gefs.sprd2(21).thumb.png.7dedd49fedbf1acbb7af1a34f9f28e45.png

 

 

 

 

 

 

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32 minutes ago, frd said:

Annual Christmas period warm up may not happen this year. Would break tradition going back many years. 

Most encouraging is the pattern forecased later month, but even more is not seeing the rapid rise in the AO and snow cover is not going to be eroded in the source regions such as in years past.  

ims2024341_usa.gif.7b0811c1a043321792330c6e76e662e4.gif1386939477_ao_gefs.sprd2(21).thumb.png.7dedd49fedbf1acbb7af1a34f9f28e45.png

Wild that were almost at the winter solstice and Hudson Bay is wide open.

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6 minutes ago, Eskimo Joe said:

Wild that were almost at the winter solstice and Hudson Bay is wide open.

Its been warm up there for so long, it’s gonna take a while for it to freeze over. And with the upcoming 500 pattern, i’m not sure it will by christmas. That being said, there will be plenty of snow cover from the looks of it. 

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53 minutes ago, Daniel Boone said:

  True. The Nino look is a bit of a Puzzle. The Study did find that the Nina augmented Pac Ridge is shunted Eastward toward the GOA with the Pattern so, that would allow for possible Aleutian LP Development. As we know, typically you get that in a Nino. 

     As far as a STJ , the Nina is weak so we should have that to work with some but, not a formidable one like in a Nino. This Winter just may be one of the odd out, off kilter One's that causes alot of busted Forecasts. 

With the oceans boiling anymore, it seems like we want weak ENSO states and nothing raging or we're cooked.

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1 hour ago, WxUSAF said:

The looks D10-15 on the ensembles are not really +TNH, they look very much like a mod-strong Nino climo. But the extended progs all evolve that to a +TNH look into the end of the month and December. That would fit more with the background forcing

Mixed enso signals are unsurprising. At least to me. Prob persist thru first half of met winter if I had to guess.  

The +tnh general idea is what I was hoping to see when I engaged in the fall. Doesn't mean easy snow lol but it does mean that cold air intrusions can support snow if everything else cooperates. Early season is pretty tuff tho.  Carving target practice is already small strike zone at any point in winter. Cold chasing precip or trailing waves is more of a JFM thing in the closer burbs. 

If I see anything that looks like it could set up something more flush I'll jump in. Doesnt have to be fancy. Just need mids to be feeding from the north as precip approaches. In Dec, if the cold isn't feeding when it's precipitating, it gets really hard for lower/easter elevations to do much. 

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This is the type of +tnh we need in Dec. Axis is broad. Has more of a bowl shape instead of a vase. I don't like vertical patterns much but CAPE has been on a heater with those later in the season lol. I say this often but the 8:30-2:30 trajectory with energy tracking thru the TN valley is a prime setup for us at any point in winter. Especially early. 

All this said, I hope the cfs is right for Jan.... 2014 vibes :lol::tomato:

image.thumb.png.8d6c7a10061e04c504af1161a540809e.png

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1 hour ago, Bob Chill said:

This is the type of +tnh we need in Dec. Axis is broad. Has more of a bowl shape instead of a vase. I don't like vertical patterns much but CAPE has been on a heater with those later in the season lol. I say this often but the 8:30-2:30 trajectory with energy tracking thru the TN valley is a prime setup for us at any point in winter. Especially early. 

All this said, I hope the cfs is right for Jan.... 2014 vibes :lol::tomato:

image.thumb.png.8d6c7a10061e04c504af1161a540809e.png

Total greatness in cold source region 

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