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1/19 - The Roulette Wheel 29 Black Storm - OBS


DDweatherman
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16 minutes ago, psuhoffman said:

Herpderps 

IMG_6905.thumb.png.fabb5d26028b17aa36d9864e91de7a40.png

The Canadian models were a lot of our least favorites for days with their super amped solutions that brought mainly rain to most of us, but now at the 11th hour they have Baltimore points north in the bullseye.

I have no idea whether to believe them but I will say there’s no better time than now to be in the bullseye.

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2 minutes ago, Fozz said:

The Canadian models were a lot of our least favorites for days with their super amped solutions that brought mainly rain to most of us, but now at the 11th hour they have Baltimore points north in the bullseye.

I have no idea whether to believe them but I will say there’s no better time than now to be in the bullseye.

They suck and make adjustments towards the preponderance of guidance at the 11th hour. No credit given.

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This is really late, last 24 hours I've been on the road a lot.  But this would have been pretty much the same map I would have put out last night if I was able too.  Nothing has really changed.  The high or low end of these ranges will depend on banding which will be a nowcast thing.  The little bit of a gap between the 4-8" zones accounts for the little bit of a "jump" that will happen between the initial SW induced boundary wave and the coastal.  4-6" will be way more common in the 4-8" zone but I do think some isolated 8" totals will pop up somewhere in those 2 areas.  As the deform band with the coastal gets going it will cut off the moisture transport to the west and the precip with the initial wave will die.  This does create a bit of a gap, but I don't think it will be nearly as bad as some of the high resolution models were showing.  It's nice that the first threat of both high probability "windows" hit, makes it easier to track if the next few waves miss.  I don't think we are done yet though...as the pattern relaxes I bet we get another wave similar to this to hit.  And it still possible one of the waves this week trends north. 

Snow1_19_25.jpg.dd0ae299994c38fd6ab4bad13ed3fa62.jpg

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2 minutes ago, psuhoffman said:

This is really late, last 24 hours I've been on the road a lot.  But this would have been pretty much the same map I would have put out last night if I was able too.  Nothing has really changed.  The high or low end of these ranges will depend on banding which will be a nowcast thing.  The little bit of a gap between the 4-8" zones accounts for the little bit of a "jump" that will happen between the initial SW induced boundary wave and the coastal.  4-6" will be way more common in the 4-8" zone but I do think some isolated 8" totals will pop up somewhere in those 2 areas.  As the deform band with the coastal gets going it will cut off the moisture transport to the west and the precip with the initial wave will die.  This does create a bit of a gap, but I don't think it will be nearly as bad as some of the high resolution models were showing.  It's nice that the first threat of both high probability "windows" hit, makes it easier to track if the next few waves miss.  I don't think we are done yet though...as the pattern relaxes I bet we get another wave similar to this to hit.  And it still possible one of the waves this week trends north. 

Snow1_19_25.jpg.dd0ae299994c38fd6ab4bad13ed3fa62.jpg

That’s a great map.

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30 minutes ago, CAPE said:

Euro+GFS+3km NAM > Canadians

Anyway still about 80% snow cover here. Hoping for a few inches to freshen up the snow and fill in the bare spots before the Arctic onslaught.

The HERPDERPS was never as crazy out to lunch NW as the RGEM and GGEM.  ALso the canadiens were the first to see there was a storm coming at all...then yes they were way over amplified compared to all the others...but no more so than the others were under amplified until about 24 hours out.  So.... I dunno none of the guidance did amazing with this, but thats also par for these types of setups where its a relatively minor feature in the longwave flow creating the storm...basically just a little bit of spin in the flow traversing an arctic boundary creating cross boundary flow and it doesn't take much to squeeze out a 3-5" snow when you have this kind of arctic boundary hangin around...but models wont see this well at any range. 

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