
snowman19
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December 2020 General Discussions & Observations Thread
snowman19 replied to bluewave's topic in New York City Metro
By the tail end of January the high latitude blocking just completely fell apart, vanished and it never came back again, right through April. Had it stayed, that winter would have easily surpassed 95-96 -
December 16-17, 2020 Storm Observations and Nowcast
snowman19 replied to wdrag's topic in New York City Metro
When I saw the warm nose in the soundings late yesterday, I figured this was going to happen. I think I mentioned it to you. The models always underestimate mid-level warming and how far north it goes with the LLJ punching in. The mid-level low’s positions aren’t exactly stellar either. The CAD has definitely been impressive though- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
snowman19 replied to wdrag's topic in New York City Metro
You’re still getting snow? I’m all sleet no snow in Sloatsburg for close to an hour now. The mid-level warming has definitely taken over for now- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
snowman19 replied to wdrag's topic in New York City Metro
All sleet up here in Sloatsburg, started about 15 minutes ago. This is the mid-level warm nose we were talking about yesterday with the LLJ punching in- 1,011 replies
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December 16-17, 2020 Storm Observations and Nowcast
snowman19 replied to wdrag's topic in New York City Metro
Heavy snow and windy up in Sloatsburg. Haven’t seen it come down this good since March, 2018. Probably close to an inch an hour right now- 1,011 replies
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Agree 100%. It’s almost certainly all over in the morning, let alone the afternoon. It will be a memory by then
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It’s not only moving but those 10:1 ratio snow maps being posted are severely overdone, they are counting sleet as snow. You are going to get mixing, there’s a mid-level warm nose punching in.....
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Yep, that 10:1 map is wayyyy overdone. It counts sleet as snow and the NAM has sleet getting all the way up into Rockland County for a time. Here is the realistic NAM snowmap: https://www.tropicaltidbits.com/analysis/models/?model=namconus®ion=neus&pkg=asnowd&runtime=2020121518&fh=51
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Honestly can’t believe this is actually going to end up cutting west....thought this was a cut and dry case of a well offshore low track given the setup and confluence. I was wrong. Such is the way of the world....
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It’s also a fast mover, it looks to be all over and done by very early Thursday morning
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Right, but look at the setup over Canada and the Atlantic....you are not getting a tucked in/coastal hugging track with that. Also, think back to how many times models underestimate confluence
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IMO the GFS/GEFS end up being the most correct. They have been extremely consistent and unwavering for the last 2 days and make the most sense given the setup over SE Canada and the North Atlantic
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I think it’s wagons south and east from here on out, the tucked in solutions were bogus all along. You aren’t tucking in a low with a high/confluence that strong and a 50/50 vortex that powerful
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The Euro is way stronger with tomorrow, that’s going to help move the baroclinic zone further east, the 50/50 low and confluence look much stronger, storm is most likely going further east and south on this run.....
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The GFS/GEFS is probably the closest to reality
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No way in hell with this setup in the North Atlantic and SE Canada does this become a rainstorm. I don’t care what the RGEM is showing
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EPS/Euro are way too tucked in IMO. No way are you tucking in with a record strong 50/50 low and confluence that strong, color me skeptical. I think the GEFS/GFS are showing the most likely outcome, this is going to turn out suppressed/east
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We haven’t seen a setup like this since March, 2018. Given how very strong the 50/50 low and confluence are, I think the threat is east/suppressed. This may be one of the few times NYC sees more snow than the north and west suburbs. For once, I think the GFS/GEFS are onto something. I don’t buy the tucked in solutions at all. Any doubts about how strong the block was going to be are all gone, it’s no joke, there is going to one hell of a sharp cutoff to the north of NYC
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It’s going to be a monster hit, probably bigger than the GFS
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It didn’t look that impressive until the high res came out. Wow
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So far today, the Ukie is an outlier. It’s pretty weak and suppressed, unlike all the other runs we’ve seen so far
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GFS is going to show a massive hit. Look at 500mb
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That +PNA is the key. It’s the one feature to keep an eye on and why the Euro just did what it did. Should it fall apart, forget it
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This is not a SWFE setup. This is like the argument that it’s “impossible” for a low to cut over deep snowcover. If a shortwave is amped enough in the wrong spot, it will cut