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New Years' Weekend Snow Potential


Rainman

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So the GFS pulls a bit north, the GEM nails southeast Michigan, and the Euro looks...better....but still south. I made this thread because of the setup + outstanding consensus. So much for that, lol.

The solution space is getting wider with time, unfortunately.

Yeah.  It is best to wait until these storms get within 120 hours to start a thread IMO (models are just a bit to much LaLa land after 120 hours).  Heck this winter maybe within 48 hours :axe:

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Lol. Much too early to punt on this one yet.

 

attachicon.gifgem.jpg

 

I'm riding the Canadian train.

 

I'm not punting this by any means myself. :lol:

 

But I'm keeping my excitement in check, as we've seen these type of setups play out not-so-positively many times.

 

The analysis in this thread has been great however. I think we can say this is the best potential yet this season, although that doesn't say much.

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As Rainman noted, there does seem to be less potential for things to go wrong compared to some other setups.  Frankly I'd go as far as to say that I will be surprised if this doesn't work out for someone...and if it doesn't, it might get me to think that this winter is just destined to be a big pile of suck.  ;)

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Best potential of the season thus far.

Early phasing for a DSM-LSE-APN hit, lack of phasing with a system scooting south of most of the sub-forum, or something in between with a nice hit somewhere. We'll see...

Succinct. To the point. No weenie bias. Voice of Reason. Appreciated.

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ILN leaning toward the Euro at this point.

 

 

 



.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
THE 12Z MODEL RUNS SHOW UPPER LEVEL LOW PRESSURE BECOMING MORE
ENTRENCHED ACROSS THE SOUTHWEST STATES TUESDAY AND WEDNESDAY NEXT
WEEK...WHILE A LONGWAVE TROUGH EXTENDS ACROSS MUCH OF THE EASTERN
PART OF THE COUNTRY. A COUPLE SHORTWAVES WILL ROTATE THROUGH THE
GREAT LAKES TUESDAY AND WEDNESDAY...THOUGH A RELATIVELY DRY AIRMASS
WILL PRECLUDE MUCH IN THE WAY OF PRECIPITATION ACROSS THE AREA.
ANYTHING THAT DOES OCCUR WOULD BE IN THE FORM OF LIGHT SNOW
SHOWERS...OR A MIX OF LIGHT RAIN AND SNOW SHOWERS.

A PERIOD OF DRY WEATHER IS EXPECTED WEDNESDAY AND THURSDAY BEFORE
THE UPPER LEVEL LOW IN THE SOUTHWEST STARTS TO EJECT TOWARD THE
SOUTHERN PLAINS ON FRIDAY. OVERRUNNING PRECIPITATION SHOULD SPREAD
WELL AHEAD OF THE UPPER LEVEL SYSTEM...WITH RAIN AND SNOW POSSIBLY
DEVELOPING ON FRIDAY ACROSS THE AREA. THE 12Z MODELS...AS WELL AS
PREVIOUS RUNS HAVE SHOWN VARIOUS SOLUTIONS WITH THE SPEED AND TRACK
OF THIS SYSTEM. THE LATEST GFS IS MUCH FASTER THAN THE ECMWF.
HOWEVER...THE 12Z GFS ENSEMBLE AND PARALLEL GFS H5 PATTERN ARE MORE
IN LINE WITH THE ECMWF...SO SOME PREFERENCE IS SHOWN TO THE SLOWER
ECMWF PROGRESSION OF THE SYSTEM IN THIS FORECAST PACKAGE
. GIVEN THIS
SCENARIO...THE CHANCE FOR RAIN AND SNOW SHOULD TEND TOWARD MOSTLY
RAIN BY SATURDAY...BEFORE DIMINISHING SATURDAY NIGHT.
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A few ensemble graphics:

 

The handful of 18z NCEP ensembles that show the storm are north of the GFS (though Thundersnow's graphic above probably holds more use than this one), in contrast to the 12z suite which had a handful of members decently south.

track.aeperts.2014122718.east_coast.sing

 

FNMOC ensembles for kicks, since only one CMC ensemble member showed up to the 12z party.

track.feperts.2014122712.east_coast.sing

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Another threat from this, given the E/NE flow and how cold the antecedent airmass will be, could be narrow zone of significant ice.

 

Granted, the lack of a deep snowpack will limit the potential somewhat.

If a more amplified GFS/GEM like solution verifies then I strongly agree with you. The euro is less bullish on the CAD as its NAO forecast is significantly lower and thus the confluence zone over Que is further north and weaker. The GFS, with its more positive NAO is advertising a much stronger high/confluence zone out ahead of the low over Quebec(1039mb high). If it is correct with its idea, models almost always trend stronger with these feature as we move closer to the event. Here is the upcoming pattern compared to the 5 day mean surrounding last years ice storm... both have the -EPO/+NAO couplet in common. Interesting setup.

 

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ggem tracks up the Ohio river, so it came south.  HOWEVER precip is all rain.  

 

this is how bad winters begin to show themselves.  Threats that are complicated and end up falling apart, cold shots getting pushed back, cold shots without storms,  and storms that have very little cold-sector precip.   (sorry for the rant, just the overall mood after looking at the models and hearing the rain on my office roof).

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