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December Obs and Banter


WinterWxLuvr

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If the JMA or Brazilian meteogram was the only prog that showed me with snow, I'd feel less excited. Nothing really tops the Euro ensembles at Day 5-7 as far as accuracy. Doesn't mean it's right here, but still...

it might be right.. it's also kind of on its own with the snowier solution into the cities tho which is usually a flag. i don't know enough about the ensembles to dispute any claim. i do know there are some situations where the mean isn't necessarily that valuable.

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How the hell did this go from a CHI special to a coast redeveloper so quick. GFS, lol. Let's see what the good Doctor has in store.

I havent looked at FB yet but I am sure DT is claiming victory... which is the kiss of death for us.. cause one thing is for certain... the solution will change between now and next Thurs.

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i do know there are some situations where the mean isn't necessarily that valuable.

Absolutely. You definitely get that case with the GFS. With fewer members, extreme outliers can bias the mean so much that it's not useful. With 51 members, the Euro ensembles SHOULD avoid such a scenario in almost all situations. But, since I can't view the individual members, I can't be sure of it for a given case.

We'll see what today holds, but certainly that the GFS and Euro Ops both have not dissimilar solutions (at least for the moment) to the Euro ensembles suggests to me that it's not an extreme outlier, even if it gives us more snow than the others.

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So the xmas s/w and s/w that causes the Miller A-B storm both originate from the E PAC trough / developing Omega Block. These two waves kick out as the block shoots over the N.P. to merge with the -NAO block. I can't imagine why the last 4 GFS runs have all been very different!

Time to sample the North Pacific! Send out the crews...

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OK, let' me put this in the right thread, stuck it in wrong one earlier.....

Well, isn't this a surprise......sleet and 39 degrees. About 25 minutes of pure sleet, just enough to whiten the elevated decks and car windshields. Now a mix of rain and sleet. Had about 0.03 liquid precip so far. Another big miss by forecast, they were calling for rain showers by late afternoon and a 48 high.

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I realize that Wes isn't honking for the New Year pattern, but I do like when he starts to make posts like the one below. Given very limited knowledge, it even seems to me like the pattern - as modeled - is looking pretty good for early January, and is certainly the best look we've had so far.

If anyone sees Lucy, give her a forearm shiver to the throat.

I don't have much to say except that the super ensemble mean for D+8 is the nicest so far by far. The pattern is shown has 3 analogs that produced a 4 inch storm within 3 days of the centered mean, dec 1966, Dec 2009, Jan 1, 2001. It also had another that fell witin 5 days. That big of storm is so limo unusual that having 3 analog dates clustered that closely suggests that the pattern finally is one that is above average for snowfall. The D+11 also isn't that different. I looked for the D+11 Centered mean from Dec 2009 I know I posted it on Eastern back in the day but must have deleted it and then eastern lost all the graphics for the dec thread.

Anyway, here's the 500,

post-70-0-87687900-1356028019_thumb.gif

I still suspect that the coming storm post christmas will be mostly rain but not with nearly as much confidence as earlier. The pattern on the superens mean is a pretty good one through the new year. Of course the models have been all over the place so it would be nice to see the pattern hold for a few days before going completely ga ga on it.

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