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Frontogenesis/Baroclinic zone induced snows


snowstormcanuck

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Yup. OB is closest to the sweep spot. Dan and I gotta start sweating it out, although, verbatim, it's still a very nice hit even here.

Believe me I'd be fine with 6-12'' of snow even if the eastern sections get like 12-16".

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At least with wave 1 we may be coming into better agreement. Even the NAM shifted that wave south a touch at 6z. Looks good for a solid 2-4".

 

Wave 2 might end up being a whiff here. Gotta give the SREFS/NAM/GEFs massive props if that ends up being the case. Not often you see those short-bus models school the EURO and GFS.

 

Wave 3 looks good for a solid moderate snowfall here. I'm thinking 4-6" as a preliminary number. So the massive numbers look to stay NE, from Georgian Bay to around Kingston, but should still be a profitable weekend down here. Good news is that I think we've maxed out this north trend. Maybe we'll start to see a slight shift back to the south to fit climo.

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At least with wave 1 we may be coming into better agreement. Even the NAM shifted that wave south a touch at 6z. Looks good for a solid 2-4".

 

Wave 2 might end up being a whiff here. Gotta give the SREFS/NAM/GEFs massive props if that ends up being the case. Not often you see those short-bus models school the EURO and GFS.

 

Wave 3 looks good for a solid moderate snowfall here. I'm thinking 4-6" as a preliminary number. So the massive numbers look to stay NE, from Georgian Bay to around Kingston, but should still be a profitable weekend down here. Good news is that I think we've maxed out this north trend. Maybe we'll start to see a slight shift back to the south to fit climo.

 

Can't disagree with your thoughts. I am thinking we can see a slight adjustment south with wave 2 but we will see. 

 

Snow should begin to fall in less than 24hrs so the boundary/BZ will be pretty clear by that time.

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BUF likes the GFS/EURO camp...

 

WITH RESPECT TO THE PRECIPITATION TYPES WE CAN EXPECT...THESE WILL
GREATLY HINGE UPON THE EXACT POSITION OF THE MAIN SURFACE WAVE/
FRONTAL BOUNDARY. THE OPERATIONAL GUIDANCE IS CURRENTLY DIVIDED INTO
TWO MAIN CAMPS...WITH THE NAM/GEM GLOBAL SUGGESTING A MORE NORTHERLY
TRACK TO THE LOW AND CONSEQUENTLY A FURTHER NORTHERLY FRONTAL
POSITION THROUGH SUNDAY NIGHT...WHICH WOULD ALLOW FOR ENOUGH WARMING
OF THE COLUMN TO INTRODUCE A MIX OF PRECIPITATION TYPES ACROSS AT
LEAST PART OF THE AREA SOUTH OF LAKE ONTARIO. IN CONTRAST...THE
GFS/ECMWF ARE NOTABLY FURTHER SOUTH WITH BOTH THE LOW TRACK AND THE
MAIN SURFACE FRONT...WHICH WOULD RESULT IN THE ATMOSPHERIC COLUMN
REMAINING SUFFICIENTLY COLD ENOUGH FOR MAINLY SNOW ACROSS THE BULK
OF OUR REGION...WITH PERHAPS A LITTLE SLEET MIXING IN ACROSS THE
SOUTHERN TIER SATURDAY NIGHT AND/OR SUNDAY. GIVEN THE PRESENCE OF A
STRONG ARCTIC HIGH PARKED TO THE NORTH OVER ONTARIO AND QUEBEC...
THIS LATTER SCENARIO /WHICH ALSO HAS STRONG SUPPORT FROM WPC AND OUR
PREVIOUS CONTINUITY/ APPEARS TO BE MUCH MORE PLAUSIBLE AT THE
PRESENT TIME...AND HAVE THUS LEANED MORE HEAVILY TOWARD THIS IN
PUTTING TOGETHER THE CURRENT FORECAST.

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Can't disagree with your thoughts. I am thinking we can see a slight adjustment south with wave 2 but we will see. 

 

Snow should begin to fall in less than 24hrs so the boundary/BZ will be pretty clear by that time.

 

Yup, I'm open to that possibility as well regarding wave 2.

 

And wave three has the potential to be 6"+...I'm just hedging my bets until the NAM capitulates.

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Hang in there Roy. Fast moving, low amplitude waves (more like ripples) in the ul flow are giving the models fits. Could still see a few more surprises. Although...that cuts both ways :unsure:

It is hard when the models are updated to know exactly what the biases are anymore. It has been odd see this trend further NE.  As outflow and I were saying yesterday normally the models hit (with these situations) at the warmth overspreading southern MI but typically the boundary doesn't make it this far north.  One thing is typically the models would play catch-up and I am used to the NAM typically being the worse at overdoing the warmth.  6Z GFS was at least encouraging for MBY.

 

That 3rd wave is one that if I do well you should do excellent!   It would take an incredible shift south totally screw you (north ugg I can't see it going more north).   The 1st and 2nd waves I am not in the right ball park right now :lol:

 

Also keep in mind that with the major storm we just got even the NAM went a bit too far north (a couple run had the 22" bulleyes on MBY & even one up to Flint). 

 

Hopefully the 12Z package will give us some better results!! :weight_lift:

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Euro/GFS still very decent around here. Still liking the LE potential with this one blizz?

Models want to back winds a little more now and inversion heights look a little worse as well. Theres a window for LEhs between 0z sunday and 0z monday, but it won't be a pronounced band of LES IMO.

 

EDIT: Also a Lehs risk with wave 3 from the hammer to Niagara.

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We have a chance with wave 3 here SEMI especially north of the area. Sunday-> Monday could get interesting.

The s/w's had trended to dig a bit deeper this season.  In this setup that would make wave 3 pretty interesting for us.

 

Right now I have very low expectations (DAB-1") but it sure would not take much of a change with that wave 3 to be a bit more formidable.

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