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NYC/Tri-State Area OBS and Disco


earthlight

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From my discussion earlier this morning on the blog

http://nymetrowx.blogspot.com/p/forecast-discussion.html

Long Term

The long term pattern will be characterized best by the word "transition". Initially, a large upper level low and confluent flow will remain over the Northeast United States. Another very cold night Wednesday Night into Thursday morning..followed by slightly higher diurnal maxes Thursday with some rising heights aloft. Major changes then occur aloft as the upper level low over the Northeast shifts northward and erodes the -NAO block over the North Atlantic and Greenland.

A clipper shortwave will eject eastward from Alberta towards Southeast Canada. With limited moisture, kept pops low, but a cold enough airmass for snow seems the most likely solution at this point. We could see some mixed precipitation near the coast if the timing is more towards the middle of the day, though, especially considering the surface low's positioning to our northwest.

This shortwave shifts northeast and a significant shortwave organizes in the Central United States, amplifying over and east of the Mississippi River and then, as some guidance suggests, phasing with a piece of the Polar Vortex over Central Canada which drops south towards the Great Lakes. The eroded -NAO block and the state of the Pacific (PNA/EPO both unfavorable) suggest this should be a more inland tracking storm system--but we have seen surprising trends amongst guidance a few times over the past few weeks--so we will err on the side of caution here and go rather low with precipitation pops (30-40 percent at this point)..and call it mostly rain. A trend towards a weaker shortwave over the MS valley, or stronger confluence to our north, could mean frozen precipitation issues at the start for our interior counties.

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:lmao: I know, seriously.. I think I'm a little better shape than West Nyack, by the Palisades Center.. that place is in the bottom of the pit. It's nice to see they're finally addressing the flooding situation in that part of Route 59.

Theyve tried for years to address it.....hopefully this fix is the final one. Before the mall even went in....anything over an inch of rain in a shorter than 24 hour span and route 59 would have to be closed. :arrowhead:

I dont want to get yelled at for being off topic lol...but its really cool seeing the litlte "microclimates" throughout the different parts of Rockland....

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Today was the first legit below freezing low, as we were all in the mid to upper 20s-- even LGA was below freezing! Looks like next week, the highs will be in the 20s and the lows in the teens, even in the city.

Can't wait for that. Snow or no snow, it will still feel awesome.
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Looks like a cool ocean effect snowband is setting up just south of LI now. You could never tell based on how calm and clear it is right here on the extreme south shore. 30 miles from here is likely experiencing a blizzard.

Also, the calm winds seem to finally be allowing the cold temp readings across the area tonight.

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Looks like a cool ocean effect snowband is setting up just south of LI now. You could never tell based on how calm and clear it is right here on the extreme south shore. 30 miles from here is likely experiencing a blizzard.

Also, the calm winds seem to finally be allowing the cold temp readings across the area tonight.

If you looked south today, you would have seen the stratocumulus cloud deck associated with that snowband.

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If you looked south today, you would have seen the stratocumulus cloud deck associated with that snowband.

I did see the cloud deck down there, but it didn't really get organized into a solid band until recently. It's common to see snow showers and squalls/bands develop over the ocean during cold air outbreaks like this. The clouds literally start developing right off shore and become more and more solid the further you look. I guess I know what Toronto sees during the big NW flow lake effect outbreaks?

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