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Ostrich December

Merry Christmas! Look at those temps at 1pmish on Christmas Day.
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You could potentially argue the abnormally wet conditions we've had here this year & in the past few years in general have made it more difficult to get good CAD because it favors higher dews/RH.
Maybe you could also argue that when the ingredients are right it could end up producing more winter weather for any given location ?
 
Trends leading to the Christmas clipper on the GFS were observable fairly early on- look at the vorticity signature over Canada this run. And the leading trough (anafront) was more neutral and faster --> more separation between these waves, and cold air rushing in early. Strengthen/dig that second piece a bit more, and that will translate to more precip. All N/S, no Baja low necessary.
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How bout that Greenland block View attachment 58439
Was going to post this, but you beat me too it. What a look. I think the shot on Christmas day looks the coolest, because it's clearly a product of the amplified pattern and our big east coast trough:
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Unlike the last few runs where this features stays further south and east, this run it breaks off and pushes poleward, which is really promising for the long-long range stuff. A few model runs looked like things started to crumble after the Christmas cold plunge, but this would be a viable (if tricky) path to putting that collapse off for a little while longer.
 
Only in 2020 would we have some of the coldest air fall on Christmas Day with virtually no moisture... Hoping this trends favorably these next few days!!
 
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