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December 26-27 Storm Threat


Baroclinic Zone

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Always cautious til the flakes are flying, but at this point it is impossible not to be forcibly thrown to the floor and taken by what is modeled.

Oh I'm quite bullish, but I've been around long enough now that I've seen some pretty bad busts.

I probably would be telling everyone 18" if this was 5 years ago, but I know better than that now. Did you see how fast the models changed today? You have to keep in mind there is no reason they can't change quickly back to a more "scraper" type solution, thats all. I think what they are seeing is real, and we can get pretty excited, but I don't think we should be totally oblivious to the difficulty the models have handling this pattern.

This might be a 1 in 5-7 year type model debacle this close in for this big of a storm. Everyone always talks about the models busting but usually they don't change this much inside of 72-84 hours. This is like March 2001 territory.

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NCEP I agree with in pointing to a couple of likely issues:

CONSOLIDATING UPPER LOW OVER THE EAST...

LOW PRESSURE FORMING UP THE EAST COAST...PREFERENCE FOR A 00Z

NAM/15Z SREF MEAN COMPROMISE

THERE ARE SMALL SCALE DETAILS THE NAM/GFS/ECWMF ARE SHOWING ISSUES

WITH WHICH MAY IMPACT ITS FORECAST LATER ON. THEIR SOUTHERN

STREAM SHORTWAVE IN TEXAS ARE 30-40 METERS TOO WEAK AT THE 500 HPA

LEVEL BASED ON RAOB REPORTS FROM TEXAS. THE NAM DOES NOT CAPTURE

THE ONGOING CONVECTION IN EASTERN TEXAS. THE 18Z AND 00Z GFS RUNS

ARE SHOWING SIGNS OF CONVECTIVE/GRIDSCALE FEEDBACK AS THE SYSTEM

MOVES ALONG THE GULF COAST WHICH COULD BE MAKING ITS SOLUTION AT

THE SURFACE AND ALOFT TOO STRONG. THERE ARE HINTS THAT THE RIDGE

INITIALLY ALONG THE EAST COAST IS MORE AMPLIFIED THAN THE

NAM...WHICH WOULD BE CLOSEST TO THE 12Z ECMWF/12Z ECMWF ENSEMBLE

MEAN FORECASTS FOR 00Z. ANY OF THESE DETAILS COULD

DEGRADE/NEGATIVELY AFFECT THE SHORT RANGE FORECAST.

Reasons to wait for the euro. Although convection can pump up the downstream ridge too. However, if it goes bonkers with convection..that can impact the model. ULL over the gulf can produce good convection, so this will be interesting to follow.

GEM looks like near BM..maybe just east??

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Northern and potentially arctic jet stream impulses are diving to the south currently over the Northern Plains. First initial northern stream impulse over the Lower Great Lakes is beginning to dampen out and weaken as its precip shield shrinks as modeled. This is opening the door for the ability for the models to pick up on the next two disturbances and the potential phasing to be modeled more correctly. Need some sleep now.

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Oh I'm quite bullish, but I've been around long enough now that I've seen some pretty bad busts.

I probably would be telling everyone 18" if this was 5 years ago, but I know better than that now. Did you see how fast the models changed today? You have to keep in mind there is no reason they can't change quickly back to a more "scraper" type solution, thats all. I think what they are seeing is real, and we can get pretty excited, but I don't think we should be totally oblivious to the difficulty the models have handling this pattern.

This might be a 1 in 5-7 year type model debacle this close in for this big of a storm. Everyone always talks about the models busting but usually they don't change this much inside of 72-84 hours. This is like March 2001 territory.

Really, If everyone stops and thinks about it, This is really as good as it probably can get and there is only 1 way it can go from here........

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I don't want to make it sound like this will fail, but we have one good suite of a consensus and we're fairly close in, but we still need to be a bit cautious.

Never forget:

http://www.meteo.psu...1989/us0223.php

One of the most disappointing storms of my life as a young grade school weenie.

Man... how did that ever escape east with that HUGE monster trough to ride??

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Really, If everyone stops and thinks about it, This is really as good as it probably can get and there is only 1 way it can go from here........

He summed it up well. It's easy to fall in love with these solutions, but we've seen the busts and look what took place today. I feel good for my area, but I have that uneasy feeling that I can't shake. Maybe that changes in an hour, but we still could see a last minute shift. This is one unstable pattern...or perhaps I should say unstable model solutions.

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Really, If everyone stops and thinks about it, This is really as good as it probably can get and there is only 1 way it can go from here........

I know, but we are getting to the point where we are only 1 day out right now... We will know tomorrow night where the low is forming and whether it will come up the coast or not... there is nothing to push it out east its either its negatively tilted and coming north or positively tilted and going east.

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I'm very sorry to hear this news, Jerry. You have my fullest condolences.

thanks Don. YOu're a great guy and probably the most knowledgeable guy I've personally met without a red tag. It is kind of sad but he's gone. However, he is gone, one of the potentially great blizzards of my life may be coming. I'll pay my respects after the storm leaves and I can get out of Boston.

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I don't want to make it sound like this will fail, but we have one good suite of a consensus and we're fairly close in, but we still need to be a bit cautious.

Never forget:

http://www.meteo.psu.edu/~gadomski/NARR/1989/us0223.php

One of the most disappointing storms of my life as a young grade school weenie.

I was at NWS KORH then.. have all the data ( hand held) on that. ORF - ACY to HYA were in SN + and ORH got only light snow. Bob Copeland and Barry Burbank changed the forecast from 12 -16" to 2- 4" in just 6 hours morning to Noon! :lol::axe: Maybe can share at a SNE GTG or something.

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He summed it up well. It's easy to fall in love with these solutions, but we've seen the busts and look what took place today. I feel good for my area, but I have that uneasy feeling that I can't shake. Maybe that changes in an hour, but we still could see a last minute shift. This is one unstable pattern...or perhaps I should say unstable model solutions.

I am just as happy as everyone else at todays trends, But the skepticism remains as we are still quite a few hours from the event and need to see more consistency before getting fully onboard.......

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