it would be temporary and not of the same strength as we've seen over the last few years. could get some overrunning type events if the EPO is still negative like it shows there
also, you don't need an Arctic cold outbreak for it to snow in an active pattern in early to mid-Jan. you just need it near to slightly BN, which is what ensembles have for the beginning of the month. the snow cover stuff is a concern, but if air is coming out of AK and northern Canada it will be cold enough for us
could that change later on towards the end of the month? perhaps, but that's way out there and a -NAO can pop for all we know
those 5 day anomaly maps include the 27th and 28th, which is before the cutter and that warm shot has been trending warmer due to better ensemble agreement. it's pretty misleading. if they wanted to show a can kick, they should have shown Dec 30 onwards, not what they showed here. afterwards, the pattern still remains the same
also, Indian Ocean forcing in El Nino Januarys is cold
the source region drastically improves, though. instead of a Pacific onslaught, you're getting air out of AK / northern Canada and split flow underneath. it's a completely different pattern
those aren't of much use... they're 5 day means that start on the 27th, which includes the torch ahead of the cutter. that warm surge has trended stronger
the overall 500mb pattern change is still moving forward in time. also, you need the 500mb change before any snow can result. don't wanna put the cart before the horse
that trend towards more of a +PNA as we creep into the more standard long range is also the exact opposite of what we saw last year. makes sense given that we're in a Nino now
yup. this run has the works: Arctic ridge bridge, -NAO, -EPO, -AO, split flow, cross polar flow, 50/50 ULL, TPV in southern Canada, and a potent southern stream wave
what a weenie pattern. the -NAO is a game changer if it's real. goes from cold and active to bigger storms quickly
the split flow with vorts undercutting the -EPO is also great to see. all around really nice stuff
also, a warm Canada doesn't mean that it can't be cold here. it's a silly argument. +10 up there can be -5 down here... the GEFS shows that well. this is often the case in El Nino winters. Feb 2010 is actually a glaring example. Canada was absolutely blowtorched and BWI got 50" that month
idk man, does this not look like a massive change? the pattern is fundamentally different in the Pacific. you go from an AK trough regime into a AK ridge regime
how the fuck is January 1-4 mid-month? what is going on in here. do we need to redefine dates?
@qg_omegaone of those is literally for Dec 28-Jan 2. explain to me how that isn’t around the end of December