All 4 major airports saw similar departures from this cold air:
24th: ~ - 23F
25th: ~ - 15F
26th: ~ -12F
All are running 2-3F BN for December. Will walk some of that back the next few days, so maybe ending around -1F?
A shift to a more favorable longwave pattern remains steady around the 7th/8th. Not much else worth looking at IMO before this weekend assuming that doesn’t change.
You can see the temps cooling the last 48-72 hours of the ensembles. If that H5 look is right, temps will cool down fast. Point is, the torch looks temporary and so far the return to a better look isn’t getting can-kicked.
Don’t think we’re going to get digital blue as a Christmas present, but we did get continued good H5 looks at D13 or so overnight. Better than coal and onions in our stocking I guess.
That plot shows the MJO hanging weakly in phase 7. MJO hasn’t really been a factor lately so I wouldn’t overly worry. A lot of variability the last 60 days or so (maybe even closer to 90) has been driven by the PAC jet and the EPO. All seems to be cycling on roughly 2 week timescales. We can already see signs of the EPO switching back to negative.