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Midwest Thanksgiving Storm...


Powerball

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you bastards (jk of course) talking about this secondary bs are killing me. I can't even sleep through the 6z GFS as it is now so w/e.

It is unlikely but not impossible.

I am more curious to see how the first wave of cold is handled...the models are still playing major catchup to how damn cold it is..and to the refrigerator being built right now over the Northern States/Canada in terms of cold and snow cover.

the umket looks even colder bringing the 540 line almost to the northern STL metro. means nothing in terms of sensible weather for me, but the GFS has me wet bulbing 1c above freezing when the precip arrives..Can the models still be to warm?

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00zrgempmsl10mwinds2mtemps048.gif

That is in the evening..with the surface front still pushing south at this point it is in Mississippi/Alabama and still moving south. I wonder how much cold air can filter south before the return flow has precip breaking out over our areas the next day.

This is likely nothing but still fascinating to me to see the models play catchup every run with the cold.

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The NAM is attempting to develop a low much further south - it would certainly make for some forecast changes.

It is, and it does have some support from the GGEM. Although as usual, we tread lightly with the NAM at 84 hours. Still, it'll be interesting to see what the rest of the 12z model suite comes up with today. Pretty big difference between it and the GFS though...for here the NAM tells me to break out the shorts on Turkey Day...GFS a coat. arrowheadsmiley.png

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It is, and it does have some support from the GGEM. Although as usual, we tread lightly with the NAM at 84 hours. Still, it'll be interesting to see what the rest of the 12z model suite comes up with today. Pretty big difference between it and the GFS though...for here the NAM tells me to break out the shorts on Turkey Day...GFS a coat. arrowheadsmiley.png

Yes precede with caution, but honestly with energy being left behind in the southwest/tailing behind, it isn't that far fetched to expect some sort of secondary low, I think trends certainly need to be monitored at they go along, also having support of the GGEM doesn't hurt the cause either.

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This northern low scenario hasn't rested well with me ever since it first showed up a few days ago. A few models even flip flopped on whether it would just be an inverted trough or low. My feelings on that haven't really changed; it's more likely to be an inverted trough and not a full closed low. If it does manage to close off, it'll most likely be weak. Now, I could be wrong on this, but there's plenty of climo and case studies to suggest that the southern low is often the dominant force and that it will usually track towards/into the inverted trough as the low matures.

Link citing the phenomenon: http://journals.ametsoc.org/doi/pdf/10.1175/1520-0493%281994%29122%3C0565%3AITACOI%3E2.0.CO%3B2

In the end though, it's not going to do alot to change precip types or any real reason for anybody south of central WI to get excited about. It might help with the drought situation though, and that's welcome news in itself.

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This northern low scenario hasn't rested well with me ever since it first showed up a few days ago. A few models even flip flopped on whether it would just be an inverted trough or low. My feelings on that haven't really changed; it's more likely to be an inverted trough and not a full closed low. If it does manage to close off, it'll most likely be weak. Now, I could be wrong on this, but there's plenty of climo and case studies to suggest that the southern low is often the dominant force and that it will usually track towards/into the inverted trough as the low matures.

Link citing the phenomenon: http://journals.amet...OI%3E2.0.CO%3B2

In the end though, it's not going to do alot to change precip types or any real reason for anybody south of central WI to get excited about. It might help with the drought situation though, and that's welcome news in itself.

It might help areas to the east too, all depends on how progressive that northern low is, although at this stage it doesn't look to be that quick moving.

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12z NAM dumps some serious rainfall from MO up to SW lower MI. And is trying to do something at 84 that would make Friv happy. ;)

nam_p48_084s.gif

Would be funny if we go from most of the rain missing south to most of it missing north. I doubt that will happen, but this scenario has been morphing to some extent. NAM suggests a possible severe threat here on Thanksgiving if we can realize a little instability.

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Would be funny if we go from most of the rain missing south to most of it missing north. I doubt that will happen, but this scenario has been morphing to some extent. NAM suggests a possible severe threat here on Thanksgiving if we can realize a little instability.

Certainly remains possible that scenario plays out. At this point, if that happens, you have to chalk it up to some bad luck.

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Lets see which way the GGEM/EURO go but I already have an idea which way they will lean, hint Good For Sh** isn't it.

The GFS might be too quick to push the front through. I have a feeling that the GGEM/Euro will fall somewhere in between the NAM/GFS but it's really just a guessing game.

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The nam and rgem are now even colder with the first wave...bringing near freezing temps to me tomorrow am, a far cry from the mid 40s a few days ago.

with 24 hours till the cold blasts threw, wonder if they will trend even colder.

we say the models trend colder and stormier with the 2006 dec 1 storm because the surface cold within a 5-6 day period literally was hundreds of miles furthers south then models started out.

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