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Jan 11-12 Model/Forecasting Discussion


Ji

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GUIDANCE DIVERGES FROM DAY 5 TUE ONWARD. DUE TO THE

00Z ECMWF TRENDING SLOWER THAN CONSENSUS WITH ENERGY CROSSING THE

CONUS DURING THE PERIOD... THAT MODEL EJECTS THE INITIAL WAVE EWD

INTO THE ATLC AND THEN TAKES ANOTHER 1-2 DAYS TO DEVELOP ITS

STRONGER WRN ATLC SFC LOW THAT ENDS UP ON THE SRN FRINGE OF THE

MODEL/ENSEMBLE ENVELOPE. 00Z GEFS/12Z ECMWF ENSEMBLES SHOW BEST

CLUSTERING A LITTLE EWD OF THE 00Z GFS BUT THE GFS IS WITHIN THE

SOLN ENVELOPE AND THE UKMET/CMC TRACKS ALSO FALL IN THE MIDDLE TO

WRN HALF OF THE SPREAD. WITH ENSEMBLE MEANS OFFERING THE BEST

CONTINUITY AMONG GUIDANCE SO FAR... PREFER TO LEAN MORE TOWARD THE

00Z GEFS/12Z ECMWF MEANS WITH ABOUT 1/3 WEIGHTING OF THE GFS TO

PROVIDE SOME ADDED STRENGTH FROM DAY 5 TUE ONWARD. IT IS HOPED

THAT WITH A LARGER PROPORTION OF THE SUPPORTING ENERGY CROSSING A

MAJORITY OF THE CONUS VERSUS ENTERING THE CONUS FROM CANADA WHERE

MDLS HAVE MORE DIFFICULTY RESOLVING SHRTWV FEATURES... THAT THIS

SYSTEM WILL ULTIMATELY HAVE SOMEWHAT BETTER PREDICTABILITY THAN

PRECEDING SYSTEMS AFFECTING THE EAST COAST.

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Yes, I know its the NAM, but the 6z at 84 hours gives me wood. Maybe its just me, but I think it looks excellent for a huge hit. And no Ian, it doesn't look like the GFS....it looks better

I thought the exact same thing. Looking at it, it just looks like two steel balls heading for a massive collision. Could be that I don't know much too, so you have to factor that in as well.

I also know that this thing needs to come through for us. One, because if we get "Vodka cold" soon, I'd like it to be white outside, and, two, I'm sick of seeing that trapezoid patch of white showing up over Virginia on these damn QPF maps.

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unlike 12/26, the Canadian, DGEX and now the GFS are showing good hits for us

considering we had the European on our side at this range several times this year with absolutely no result, I'm feeling like this one will give us at least a moderate snow

speaking for the DCA/BWI metro areas that is

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unlike 12/26, the Canadian, DGEX and now the GFS are showing good hits for us

considering we had the European on our side at this range several times this year with absolutely no result, I'm feeling like this one will give us at least a moderate snow

speaking for the DCA/BWI metro areas that is

The way all the models have been playing us this year I am not sure what to think with it still being 5days out. If we can get it to within 48 to 72 hours then I will start believing.

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- Happy New Year my friends!

Long time CapWx poster, and fan of all of you. Just for the AM fun - have any of you looked at the precip shield and temp TANK on the 19th or so on the 6z GFS? Im trying to remember something non-tropical that looked this "colorful"...what a week off from work that would be for the feds.

Back to Tuesday - Models are sure in better agreement than leading up to xmas. I keep in the back of my mind that the NAM was last winter's big winner 3 and 4 days out. Lets see...

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Desperation is setting in when we're all rationalizing the NOGAPS op run and its SE bias into a hit for us.

Nah - no one is taking it seriously. It's not like we are ignoring the whole model suite and saying "Yeah but NOGAPS is hitting us!"...the NOGAPS is just one small piece of positive news on top of what has generally been some good reason for cautious optimism.

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