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About RitualOfTheTrout

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Dendrite Connoisseur
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Four Letter Airport Code For Weather Obs (Such as KDCA)
KPIT
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New Kensington, PA
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No snow here today, going to have to wait until tomorrow it looks like. Not surprised, with these rain to snow in marginal temperatures my yard is usually liquid longer than anticipated. Looks like a few chances for light snow over the next week, but probably another week at least until something bigger is possible.
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It is, but there is some lag from peak with respect to influence in the atmosphere. I'm not sure there is a way anyone knows for sure what that lag time is as it's going to be tied to other seasonal variables that may or may not constructively interfere. There seems to be 2 school s of thought as I read people who are way more qualified to analyze these things, one is La Nina influence takes over and the easy is warmer the other is the typical lag effects from the SSW hit in Feb and we get blocking and a colder outcome. That all being said, as we get into this upcoming weekend through rest of January all models generally agree on a more active pattern setting in conducive for snow. Edit: psuhoffman has a good post (as usual) on page 39 in the mid atlantic thread illustrating the possible gradient pattern I was talking about earlier.
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Color me skeptical right now, I don't doubt we get colder and have a brief period of NW flow "events" but we are getting to the point in the season where typical Nina response (Western trough, SE Ridge) conflicts with big cold in the East. Maybe the SSW reshuffles the deck so to speak or provides a resurgence of blocking but I'd bet the big cold look is muted as we get closer in time. If we keep the blocking it would probably setup a gradient type pattern with storms riding along the gradient as it wobbles N to South coinciding with -NAO / SE Ridge strength. Maybe some overrunning WAA type storms. This would probably be more towards the end of the month and if it sets up to far north of your desired location it's a warm wet / cold dry type of setup. One could argue we haven't really had the typically expected Enso response in the past few years due to other factors so the entire base for my argument may be moot anyways. Just throwing some gueses out there right now to stir debate since we will be quiet weatherwise for a bit.
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No discrete threats to follow yet, but looks like we should have a period with a more favorable pattern coming up. That could change (the no discrete threat part) in short notice though with all the short waves flying around. I wouldn’t mind some clippers with some enhancement off the still relatively warm lakes as appetizers for some bigger storms later in the month either. I do think we enter a period where misses South / East are more likely when blocking peaks.
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Not terribly informative but a "fun" read while we wait for the next snow threat to track: https://pittsburgh.cbslocal.com/2020/12/29/pittsburgh-weather-snow-winter/?utm_campaign=trueAnthem Manual&utm_medium=trueAnthem&utm_source=facebook&fbclid=IwAR2M6BlBRt27u7OKOMsfswAWa5TvFsAgbDNHj_Pz7SKTf8e-4Mdw4ZkLkzk
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I'm seeing alot of discussions / debate on whether the higher heights in Greenland are really due to a "true" NAO or just the result of way above normal temperatures inflating past average 500mb heights for this time of year. Still more data says that the precursor to a SSW / PV split is typically above average temperatures for us. All above my pay grade but what I do see is a general lack of cold air. It's odd to see rain on the NW side of a low pressure in early January anywhere let alone up into Canada. I think we just need more time to see how this evolves. Do we end up with the typical Nina response the rest of winter (Nina's are usually front loaded) or does some other factor combined with the a hopefully weakening Nina yield different results. As always expect models to struggle during any change.
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This 100%. Baring a total failure in models we should all at a minimum have a fresh 2 inches on the ground for Christmas day as well as flakes in the air and cold temperatures throughout. Hallmark movie scenery should be had by all. I do think areas east of the city but outside the ridges will be on the lower end which includes my yard. Further West you go from the city towards Ohio stand a better chance to bust high but models will struggle nailing down a 25 mile shift one way or the other.