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December Banter


WilkesboroDude

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Per Meteostar, the 12Z Goofy doesn't even get KATL down to freezing the entire run. That's a rarity for any Dec. Goofy run. There's nothing good to say about this run for those wanting SE US cold. Hopefully, it isn't a sign of model consensus to come. Next!

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Looking forward to at least a fantasy storm for the Southeast. If you can't get those, I think that tells you the overall pattern's not right for winter weather in the SE. When the fantasy storms start popping up, then at least we know we're on the right track.

Yes, at least that's telling us the pattern is right for something to possibly happen.

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Per Meteostar, the 12Z Goofy doesn't even get KATL down to freezing the entire run. That's a rarity for any Dec. Goofy run. There's nothing good to say about this run for those wanting SE US cold. Hopefully, it isn't a sign of model consensus to come. Next!

If the 12z GFS comes to fruition we can atleast stop blaming the pacific, because everything was bad.

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Per Meteostar, the 12Z Goofy doesn't even get KATL down to freezing the entire run. That's a rarity for any Dec. Goofy run. There's nothing good to say about this run for those wanting SE US cold. Hopefully, it isn't a sign of model consensus to come. Next!

Correction: It does get KATL down to 31 on 12/12. Apologies requested. Now I'm excited!! :popcorn: ,NOT!

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1) 12Z GEFS: looked better and actually pretty good in 11-15.

2) 12Z Doc: still no sign of +PNA pattern; actually, looks butt ugly from that perspective. Ugly at day 10. I hope you didn't put away your gas masks. P.U.!

Keep hope alive! Maybe the Euro Ensembles will paint a better picture. You know we are heading for a pattern change when even the Ensembles are all over the place from run-to-run. Let's see how things are shaping up 10 days from now. Maybe there will be some semblance of stability in the long range modeling and we won't be throwing out so many different (crappy) options. I think the best and worst part of following winter weather in the SE is not really knowing what will happen. Just because long term models and forcasters show a good or bad pattern doesn't mean that's what will actually happen. It only takes one good rogue storm to make a winter wonderful and some of our coldest patterns never produce snow. I'm still waiting and seeing. It looks pretty "normal" to me. Keep stepping down until we get close to the new year and we will probably get our storm within the month of January.

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Shoot, Larry, we've got a wind from the sw and over 2 inches of rain falling out there in Goofgiggle....the only thing that's a bit off is the +12 850's. I think that's a marvy map.... one I hope verifies. This fascination with cold you are exhibiting, might be stemming from the demise of the weak NIno, coupled with frozen milk syndrome. I need you to step away from the ice cream, and call a trusted relative, lol, 'cause with our luck it'll be in the teens and sunny when that day arrives, and you won't know what to do with the cold because there's no rain.

I am fervently wishing for a nice strong Cad about that time. 2 inches into low 30's...possibiles galore, lol. T

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Electrifying new way to potentially predict tornado touchdowns

Tornadoes are being betrayed by their lightning in a way that could help save lives, according to researchers who made an accidental discovery.

Last summer, geophysicist Benjamin Barnum of Johns Hopkins University’s Applied Physics Laboratory in Maryland detected a previously unknown electrical signal generated by lightning activity that foreshadowed a tornado touchdown. This electrical signal could potentially be used with existing tornado prediction methods to improve the early warning system. Barnum presented a poster of the discovery Tuesday at the American Geophysical Union’s Fall Meeting.

On June 1, 2012, a strong thunderstorm blew over the Washington, D.C., area, producing several tornadoes. That evening, Barnum and other scientists were running tests on lightning detectors when a tornado funnel formed just 10 miles away.

“It was a fortuitous bit of luck that this tornado touched down so close to where we were running tests,” said Barnum.

About 15 minutes before the tornado touched down, Barnum’s detectors measured a huge increase in lightning activity in the direction where the tornado was developing. Similar storms without tornadoes normally produce 300 to 600 in-cloud lightning strikes per minute, but the detectors were reporting 1,037 strikes per minute in the forming tornado’s vicinity. After the tornado touched down, the lightning strike count rapidly dropped.

In a typical thunder cloud, there is a layer of positive electrical charge at the top of the cloud and a layer of negative charge at the bottom. When a tornado starts to form, the cloud is compressed and the two charged layers are forced closer together. This compaction causes rapid discharges in the form of in-cloud lightning, Barnum said.

While scientists had already known that lightning strikes can accompany developing tornadoes, one of Barnum’s detectors measured a surprising change in the nearby electric field not usually associated with the typical increased lightning activity. As the tornado formed and the lightning strikes became more frequent, the electric field’s strength began jumping up and down about once every second. As soon as the tornado touched down and lightning rate dropped off, the electric field stabilized and returned to normal.

Though further research is needed, devices that detect these electric field changes could potentially be deployed alongside existing tornado warning systems, Barnum said.

“This could be one more tool helping to give locations and early warnings of tornadoes,” he said. “If you put these things in an array alongside existing detectors, you could potentially help more people know that tornado activity is imminent.”

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Man, H5 on the 18Z GFS looks really crazy through the LR. It brings the cold for sure. It's just a chaotic pattern with tons of blocking. Why oh why can't patterns similar to that ever make it into the medium/short-term/now range? Is it just physically impossible for the atmosphere to really do such things?

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Man, H5 on the 18Z GFS looks really crazy through the LR. It brings the cold for sure. It's just a chaotic pattern with tons of blocking. Why oh why can't patterns similar to that ever make it into the medium/short-term/now range? Is it just physically impossible for the atmosphere to really do such things?

Probably. It sure seems like it. :lol:

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Man, H5 on the 18Z GFS looks really crazy through the LR. It brings the cold for sure. It's just a chaotic pattern with tons of blocking. Why oh why can't patterns similar to that ever make it into the medium/short-term/now range? Is it just physically impossible for the atmosphere to really do such things?

If only the PV hadn't shifted to her exact opposite side of where we are, I would guess if it did we would be in for a 2011/2012 redux.

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I never thought we would be sitting here wishing the snow cover would improve to 2011 levels.

Actually the snow is much better and deeper in Canada. At this time last year, in Canada, the snow cover wasn't all that great, and if you recall what little snow got put down in December of 2011 south of the US quickly melted anyway. More snow north of the border means that the air that gets into Canada will modify less, if at all. It means that the energy and moisture is there right now, but it's concentrated.

I'd say it's a good sign of things to come.

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