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Model Mayhem Snowstorm! 2/2-2/4


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23 minutes ago, rochesterdave said:

BTW, all of it falls by hour 84. Not sure why I pulled hour 102. It’s late…

0Z Euro is a pretty good compromise among the various model options from what I've seen. I think ratios will be problematic. Thinking 10:1 is about good for snow.  I wouldnt go higher.

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A few thoughts...

This will be historic....for places like St. Louis,  mid south (AR, KY, etc.) for snow and significant ice.

For here, this will be a long duration event, where the band of snowfall sets up..  Snowfall rates will be light to moderate throughout the duration.....dendrite size, ATT, look average to below average (as several posters have mentioned, omega within the DGZ, is not great, as modeled now). This should not be an extremely high impact event, relative to travel....8-14" over 24-36 hrs. is almost pedestrian around here...or it used to be, lol!   And of course, there will be a sharp cut off (snowfall wise) somewhere between CNY and the Catskills. 

Again, for where the snow zone sets up, it will be a wonderful winter scene for a solid day or so!

Last thought....watch out for next Sunday-Monday....

 

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6 minutes ago, tim123 said:

Maybe gfs comes back north next day or so. Rgem and nam are much father north. But oddly all give us same amount of snow. Atleast in buffalo roc area. Hrrr and rap are farther north as well. 

In one case you kiss the taint and her higher rates. The other higher ratios. 

It’s a good place to be as of now. 

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Looks like the NWS has not moved off their accumulations at this time. If the trend holds we might see an 8-12 instead of 12-18”. My first thought is about a foot at KBUF for the event a little more towards Lake Ontario due to enhancement and more in the hills to the south. Might be looking at 4”per 12/hour period which may not meet the Winter Storm Warning criteria however the total amount will. Interesting 24 hours ahead.

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6 minutes ago, Thinksnow18 said:

Looks like the NWS has not moved off their accumulations at this time. If the trend holds we might see an 8-12 instead of 12-18”. My first thought is about a foot at KBUF for the event a little more towards Lake Ontario due to enhancement and more in the hills to the south. Might be looking at 4”per 12/hour period which may not meet the Winter Storm Warning criteria however the total amount will. Interesting 24 hours ahead.

Hey just a few days ago we thought this week would be a thaw with 50s and rain. Even 8-12” would be a delight with the pack we already have and the temps forecasted to stay cold even after the storm with more possibilities for snow next week..

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37 minutes ago, lakeeffectkid383 said:

Hey just a few days ago we thought this week would be a thaw with 50s and rain. Even 8-12” would be a delight with the pack we already have and the temps forecasted to stay cold even after the storm with more possibilities for snow next week..

Yeah no complaint for sure. I think I’m just channeling my inner Dave and tempering expectations in the hopes of overachieving 

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4 minutes ago, tim123 said:

8 to 12 seems good. Take it and get to average for season 

It's incredible given where we were modeled a week ago (I was ready to make a tee time).  And further, the first 'punch' has trended weaker - so if we would have lost the second one, this could have been really ugly.  Not that anything is a slam dunk - but 8" and a beautifully snowy Thursday and Thursday night would be a MAJOR win!

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Yep! I agree with these sentiments. It’s nearly impossible to imagine we’d be here given the forecasts, the terrible December, etc. etc. 

This winter is working it’s way into my heart. There were desperate moments, frustration and defeatism and yet we might come out on top. 
All things considered, it feels like a miracle! Especially for my ski trip. Lol

I’m pretty bullish despite the trends of lower QPF. 12” entire thruway corridor Erie to Rome. Lollipops of 16” along the south shores of both lakes if we can get this to spin a bit. 

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2 minutes ago, rochesterdave said:

6z 10:1 map. Keeps eating away at QPF. First wave is NW. Second comes right over us. image.thumb.png.945f7183a048c1819beb9ef523f92b72.png

Yeah. It’s become predominantly the second wave. It’s not the worst case. That first wave was really going to struggle to meet the cold air in time. And it also ran the risk of suppressing the second and better wave. 

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Winter Storm Watch remains in effect for all of western and north
central New York Wednesday night through the first half of Friday.
Some trends of note showing up in latest guidance, but not enough to
alter the going watch attm as there could be at least 9" in 24
hours.

Overall the large scale pattern and expectations remain the same.
Sfc low crossing northern Quebec late tonight will push a cold front
slowly into western NY Wednesday night. This will provide the track
for multiple waves aloft to lift across the lower Great Lakes and
Northeast in deep southwest flow aloft. First stronger wave arrives
later Wednesday night with some potential for wintry mix into
Southern Tier. As boundary continues to slide eastward across rest
of forecast area, next stronger wave then lifts northeast along it
for Thursday night. Main change in the guidance right now is that
second wave and associated sfc-H85 low track more south and
southeast compared to previous runs especially in the GFS and ECMWF
runs, but in reality this is not that different from what some
models were showing a couple days ago. As mentioned yesterday,
stronger shortwave that will spin up the main low-level wave later
Thursday is still digging south along west coast today and will not
be fully onshore over southwest CONUS until Wed, so as we are seeing
now, there most likely will continue to be shifts in the track of
the system impacting the zone of heaviest snow and where any mix
occurs.

One item to emphasize with this upcoming event is it will be longer
duration, spread over 24-36 hours. At this point, rates even during
the heaviest snow, likely only top out 0.5-1.0 inch per hour. Given
the lack of very strong lift and forcing throughout, not expecting
the type of snowfall rates we experienced with the last widespread
synoptic event mid January. The period of heaviest snow looks to
occur Thursday afternoon into Thursday evening, setting up the
Thursday evening commute to see the greatest widespread impact from
the event. Do watch that morning commute on Thursday as well though
as even though snow amounts by daybreak Thursday will only be a few
inches at most, the SLRs of that snow will be wetter (<10:1) so the
impact could be higher. Given the overall southern trend shown, not
going to mention much in way of wintry mix other than what could
occur over Southern Tier briefly on Wednesday night. Majority of
widespread snow diminishes early on Friday though some light to
moderate lake effect may linger into the afternoon. If the farther
south trend holds, then the widespread snow and/or lake effect snow
could diminish as early as early Friday morning. Forecast will lean
on continuity though and keep lower end likely pops even over
western NY through daybreak Friday
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15 minutes ago, Ottawa Blizzard said:

My call for Toronto is now 4". I think we miss the main storm on Thursday, and the changeover from rain to snow is later than expected on Wednesday.

Ya, mostly just replaces whatever snow melts from today-tomorrow. lol I hope whatever storm @LakeEffectKingmentioned stays suppressed as Im not home this weekend haha 

YYZ/Toronto is 2-3" 

Hamilton 3-5" 

Buffalo 5-8" 

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