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December Medium/ Long Range


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36 minutes ago, Eskimo Joe said:

 

Thanks for posting that. This tweet was posted elsewhere and here was my response to the bottom portion that addresses the extremely unreliable late portion of the cherry picked WB 6Z CFS ens mean:

“I’d be cautious with WeatherBell CFS maps as they are usually colder than the NOAA and other versions. Also, one run of the CFS ensemble (4 members) like is being shown here (6Z of today) is extremely low in reliability, especially for the period near the end of the run. They jump around a lot. BAMwx shouldn’t imo be showing something like this as it borders on hype. They said ‘The CFS weekly is on board as well with a monster Alaskan ridge stretching well up into the pole. (-EPO)’ as if it were a big deal. But they cherry picked an extra cold run of the very jumpy, unreliable CFS and a WB version (colder than other versions) of it to boot. Don’t get me wrong. I’d love nothing more than for something like this to actually occur. But I don’t like to see hype.”

 Here’s the insanely ridiculously unrealistic and highly flawed WB 2m temperature anomaly map for this 6Z CFS ens mean for Jan 9-15: -10 to -30F anomalies (also note the typical WB CFS relative warm spot in N Michigan that’s indicative of a WB CFS flaw)

IMG_0948.thumb.png.2436975b50ca4f0e2db28148ff2030d0.png

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5 hours ago, WxUSAF said:

To my eye, all 3 ensembles appear in the process of redeveloping western ridging at the end of their runs. GEPS is fastest and GEFS is slowest, with EPS in the middle. Also been a notable guidance trend toward more ridging over the pole the last couple days and it continues through the ensemble periods. That can’t hurt. 

Until Mongolia stops sending down the goods, we stay cold.  It’s going to produce most of this month.  Specifically, out of the next 25 days, 18/19 will be below average with some -15 or colder.  I’ll leave it up to the agency that tries to predict low pressure placements to do so but gotta have the cold to begin with 

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2 hours ago, GaWx said:

Thanks for posting that. This tweet was posted elsewhere and here was my response to the bottom portion that addresses the extremely unreliable late portion of the cherry picked WB 6Z CFS ens mean:

“I’d be cautious with WeatherBell CFS maps as they are usually colder than the NOAA and other versions. Also, one run of the CFS ensemble (4 members) like is being shown here (6Z of today) is extremely low in reliability, especially for the period near the end of the run. They jump around a lot. BAMwx shouldn’t imo be showing something like this as it borders on hype. They said ‘The CFS weekly is on board as well with a monster Alaskan ridge stretching well up into the pole. (-EPO)’ as if it were a big deal. But they cherry picked an extra cold run of the very jumpy, unreliable CFS and a WB version (colder than other versions) of it to boot. Don’t get me wrong. I’d love nothing more than for something like this to actually occur. But I don’t like to see hype.”

 Here’s the insanely ridiculously unrealistic and highly flawed WB 2m temperature anomaly map for this 6Z CFS ens mean for Jan 9-15: -10 to -30F anomalies (also note the typical WB CFS relative warm spot in N Michigan that’s indicative of a WB CFS flaw)

IMG_0948.thumb.png.2436975b50ca4f0e2db28148ff2030d0.png

Your argument is probably lost on anyone who would take a 34.75 - 41.75 NWP output seriously to begin with.

By the way, greetings fellow SE weenie.  If we keep coming up to the MA forum they might have to build a border (fire)wall to keep us out.

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2 hours ago, winter_warlock said:

2013-2014 was a cold snowy winter in mid Atlantic  ill take it

An dominant -EPO ridge which somehow also manage to time the cold with the moisture to get good snow.  Perhaps a one-in-a generation event or even rarer.  

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5 hours ago, GaWx said:

Thanks for posting that. This tweet was posted elsewhere and here was my response to the bottom portion that addresses the extremely unreliable late portion of the cherry picked WB 6Z CFS ens mean:

“I’d be cautious with WeatherBell CFS maps as they are usually colder than the NOAA and other versions. Also, one run of the CFS ensemble (4 members) like is being shown here (6Z of today) is extremely low in reliability, especially for the period near the end of the run. They jump around a lot. BAMwx shouldn’t imo be showing something like this as it borders on hype. They said ‘The CFS weekly is on board as well with a monster Alaskan ridge stretching well up into the pole. (-EPO)’ as if it were a big deal. But they cherry picked an extra cold run of the very jumpy, unreliable CFS and a WB version (colder than other versions) of it to boot. Don’t get me wrong. I’d love nothing more than for something like this to actually occur. But I don’t like to see hype.”

 Here’s the insanely ridiculously unrealistic and highly flawed WB 2m temperature anomaly map for this 6Z CFS ens mean for Jan 9-15: -10 to -30F anomalies (also note the typical WB CFS relative warm spot in N Michigan that’s indicative of a WB CFS flaw)

IMG_0948.thumb.png.2436975b50ca4f0e2db28148ff2030d0.png

Are their 500 maps off as well?  I thought it was just the temp algorithm.

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10 minutes ago, Carvers Gap said:

Are their 500 maps off as well?  I thought it was just temps.

 I’ve been focusing on temps. However, I’m also leaning toward WB CFS H5 runs averaging too low. I’ve seen numerous WB CFS H5 maps with blue colors dominating the hemisphere, which isn’t realistic in a warming world since avg H5 is also rising. Regardless, BAMwx cherry picked a very cold CFS ens late in the run, which is my point.

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55 minutes ago, Carvers Gap said:

Are their 500 maps off as well?  I thought it was just the temp algorithm.

The 12Z WB CFS ens mean temps are not surprisingly much warmer than the 6Z WB CFS for 1/9-15 even though it is still pretty cold in a smaller area

6Z: Chicago ~25 BN

IMG_0948.thumb.png.ff4dbe79c4da9f67284d1f195c6a45d4.png

 

12Z: Chicago ~5 BN

IMG_0955.thumb.png.88e0479511151dbd918118bb60ba19d2.png

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36 minutes ago, T. August said:

GFS might do something? I’ll know in 2 minutes lol.

edit: looks like it’s just a different way to lose.

We need that initial wave to be stronger and drag the boundary south of us. The potential snow-producing wave can’t be the one to pull the cold air in. Then we’re chasing moisture with cold. 

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3 minutes ago, WxUSAF said:

We need that initial wave to be stronger and drag the boundary south of us. The potential snow-producing wave can’t be the one to pull the cold air in. Then we’re chasing moisture with cold. 

The ICON does this. Even better at 18z but only out to 120

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15 minutes ago, WxUSAF said:

We need that initial wave to be stronger and drag the boundary south of us. The potential snow-producing wave can’t be the one to pull the cold air in. Then we’re chasing moisture with cold. 

Discombobulated. Doubtful that evolution will  be the final outcome lol. That said, this is a thread the needle deal to get snow in the lowlands. Not impossible though.

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Not a good surface pressure configuration up top leading in on the GEFS. Pretty much the antithesis of what we want to see. Cold is way back to the NW and comes in after the storm passes. It would take a significant piece of energy that lags behind and moves along the thermal boundary as it shifts to our southeast. One member suggests this is a possibility.

1733821200-pTlpBpiisns.png

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