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December 21-22nd Winter Storm Part 2


Chicago Storm

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Yeah the uptick in QPF is the thing to take away this run. We'll see how it handles the track the next several runs but it's hard to go against the very consistent Euro and it's ensembles right now.

 

Yeah this looks like the first legit run of the GFS regarding cold sector precip.  Whatever convective feedback, or whatever issue it had before seems considerably better with this run, finally.  Been waiting for that for several runs now.  Like you said it's still pretty early, so a track shift is still quite likely.  The consistency of the Euro is definitely still the way to go at this point.

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12/20/12 redux

 

At least this time around lake temperatures are not that high. That was part of the deal getting snow into the metro early that evening.

True, but that storm had to do more with track, actually right over Chicago. By the time the deformation axis/fgen band snows came through here, the forcing weakened and the temperatures were too warm for any meaningful accumulation with the light rates. Thankfully this is just one run of the GFS.

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The GFS really needs to find some consistency and the Euro is gonna have to blink before I punt.

 

here's the thing though...even with the wound up system...the timing keeps getting delayed a bit...so it wouldn't shock me to see a similar strength timeline to what the GFS showed (SLP-wise)...but with the delay that leaves time for the front to push a bit further before the trough moves out (I swear i'm not wish-casting too....cause it's prolly not enough to help me on the south side anyways) ... just something to watch IMO ;)

 

I have been thinking slower and stronger from the beginning so whatever (and if i'm not mistaken you were thinking more amped as well from the beginning)....we'll see

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here's the thing though...even with the wound up system...the timing keeps getting delayed a bit...so it wouldn't shock me to see a similar strength timeline to what the GFS showed (SLP-wise)...but with the delay that leaves time for the front to push a bit further before the trough moves out (I swear i'm not wish-casting too....cause it's prolly not enough to help me on the south side anyways) ... just something to watch IMO ;)

 

I have been thinking slower and stronger from the beginning so whatever (and if i'm not mistaken you were thinking more amped as well from the beginning)....we'll see

 

 

correct

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Would be quite the slap in the face if the euro, after all it's consistency, suddenly jumps to the gfs camp.

 

 

The OP Euro has always had decent and increasing ensemble support where the GFS have been all over the map and probably still will be. I suspect the 12z Euro comes in more or less the same.

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EURO Ensembles now getting more on board with the insane QPF. Still not up to the level of the OP run but getting there. 12z ensemble mean had the 2+ line from LAF to just south of Toledo and the 1.75 line just sneaking up to near Josh.. 00z ensemble mean now has the 2+ line from Kankakee/Valpo just to my se running over into Detroit.. A little was lost on the outer edges especially nw side. Also have a new widespread area of 2.5+ covering se MO, S.IL up into Central IN almost to LAF. 12z run had just a small spot of 2.5 around Paducah.. Chicago went from the 1.00 1.5 range to 1.25 by IL/WI line to 1.75 on the south side.. inch+ sneaks up to geos hood and .75+ up to MKE which is the same as the 12z mean.. inch+ line sits at the IL/IA line for the Quad Cities area which is also the same as the 12z..

 

Oh and the mean is a slight bit south as well with track and a shade colder vs 12z mean.. Lost a few more ensemble members that were going over top of/nw of here. Nearly all of them are now on the same track to near/just south of Cleveland.

 

DO NOTE.. Some of that includes the system on Thurs/Fri from both runs..

 

worth a bump....if the 12z Euro completely flips to a GFS like solution it will be a notable flip flop

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