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New Years Winter Storm


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HRRR comes in way north and at the top of the QPF envelope. Not really sure what to think. The HRRR has consistently been on the north/stronger end of potential track solutions, and even at this range, I don't think that is something that can be entirely discounted anymore given the consistency that has been seen. But then again, the tendency for higher res guidance to be north in longer ranges is omnipresent.

snku_acc.us_mw.png

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Gino Izzi with a nice succinct on point AFD for this AM. Clearly hits on Alek's lakeshore call:

" NEAR THE LAKE IN NORTHEAST IL, AS WARMING MARINE LAYER COULD CUT   
DOWN ON ACCUMS INITIALLY AND IF THE LAKE EFFECT DOESN'T RESULT IN   
MUCH ACCUMULATIONS, THEN THAT AREA COULD END UP WITH LIGHTER   
TOTALS. CONVERSELY, IF THE LAKE ENHANCEMENT REACHES ITS FULL   
POTENTIAL, THAT AREA COULD END UP WITH THE HIGHEST TOTALS"

time to make a call and will go middle of the 4"-8" envelope with 6". Shame this thing is sort of booking. That said, breaking ORD's  New Years Day snow record the same winter season we set the late snowfall futility record and all within one week will be frosting on the trees so to speak.  And as LOT points out:"WINTER IS OFFICIALLY HERE!" 

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If you take a look a loft, we’ve seen some noticeable changes the past few days, and you can see why we’re at the point that we are.

With placement of the PV lobe in Canada, the ridge is has trended flatter and confluence has increased across the northern Great Lakes into the Northeast.

Additionally and the bigger change has been the trough orientation and individual wave/disturbance trajectory/interaction has changed across the West, before and after ejection of the main wave. Much less positive interaction and less phasing as well. (At one point a few days ago, some guidance had multiple waves well phased, with the main wave ejecting into the Plains amped and negative tilt).

550e9d95a5e90a72c943107258925e5a.jpg

7b97bdfea372f5145dc586820a9c225d.jpg


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