ORH_wxman

I believe 1967 is the coldest spring on record for a lot of stations in New England. Just ridiculous cold from March through May that year.

Looking at January departures at ORH, the warmest 10 day stretch was Jan 6-15. That averaged +8.9. Coldest 10 day stretch was Jan 22-31 which averaged -12.3…that stretch actually started with a +8.4 too on Jan 22, but then the next 9 blew that away. The rest of the days not listed on those two 10-day stretches were slightly BN in the aggregate so you get a total of a -3 month. December was more impressive on cold departures but January is minimum climo so getting those stretches in January feels a lot colder. December was nearly wire to wire BN cold…only the cutter on 12/18-19 and a couple other random mildish days interrupted the cold departures that month.

Model continuity on anything past Tuesday of next week has been AWFUL too...GFS coming out looks nothing like 12z at D7-8.

Midweek has not much support....its been off and on on guidance, but overall seems to be decreasing in probability as we get closer. The better signal is next weekend.

Can always adjust up

2/7 looks likely but prob not much…like C-2” type deal. Though I’d watch your area for a bit more. Wednesday seems least likely for anything. Several pieces of guidance have nothing.

1967 redux (Northern ORH county had 2 snow events that May including one on the Friday/Saturday of memorial day weekend)

Kind of a bush league warmup on EPS…keeps washing out the warmest anomalies west and northwest of us. Which is what we’d expect with a rotting NAO block. Maybe we get a cutter to get a couple days of true torch.

It’s there on eps but a bit of buckshot too

That’s a bit of an April ‘97 snowfall distribution in E MA (but not into S ME)

Wouldn’t put any stock into a d10-11 output regardless of which model it was. Well see how the AIs look vs OPs in another few days. AI runs have had that storm off and on the last few cycles.

Lock it in. Only 11 days to go

Yeah that’s later on post-Ides. I have no idea what’s going to happen during that late Feb/early Mar period. If you keep the Atlantic blocking during that period and then try and insert a -EPO, then we could get something exotic.

Def colder look mid-month….on both GFS and Canadian suites. Always be weary of the big torch look when you get blocking like that in the Atlantic…esp when there’s been a lot of recent cold with deep snow pack over a large area. Hopefully we can score one of these. Usually we can if historical -PNA/-NAO is any guide. Usually our bigger concern is ptype and not suppression.

Crazily enough, that month left some on the table too.

Yeah Mar 2018 blocking was epic you’d have shortwaves pretty amplified out in the plains/Rockies and the thing would turn into a snow threat.

2001 also kind of didn’t have the PV on our side for the most part. It was more over toward Europe and east Atlantic. Monster blocking in 2001 though. We did get a PV lobe in southeast Canada early that month which phased with the main trough to produce the interior New England HECS. But 2018 is prob the best example of not having the PV anywhere near us but still a prolific month due to the excessive blocking. That month didn’t have high end cold at all. We had basically a climo airmass for the first snow bomb on 3/7-8. A little colder for the Wilmington jackpot storm but still nothing impressive temp-wise.

Let’s go March 2018…PV on other side of pole but we just crushed it with that blocking regardless.

If it’s been a decent winter, he sometimes gets “early-March curious”…he will pretend early March is an extension of February (which it often is)

Well I don’t know where they live but pretty much every time someone tries to “end winter” in New England that early, they are wrong. Unless it’s one of those epic ratter years like 1994-95 or 2019-2020. If they are talking about not seeing highs of 15F and lows of -10F again…yeah, that’s like saying we won’t see 95F again on August 15th…prob correct but there’s still going to be plenty of summer wx to get through.

Given climo, that December ‘89 stretch is still so crazy.

ORH stayed below freezing today to make it 12 days in a row. The record is 23. Don’t think we will reach that but not out of the realm. If they can get to 20, that will be 3rd all time. Two longest stretches? Dec 8 - Dec 30th 1989 at 23 days Jan 11 - Feb 1st 2003 at 22 days

The OP run basically had us N or BN almost the entire run. GEFS look warmer at the end of the run. I expect a period of AN temps but I’m not expecting a bunch of double digit positive departures like we saw for a week in January.

We had a brief warmup after Cmas around the 28-29th but yeah, the real warmup was 2nd week of January. It’s been pretty cold otherwise. I’m not on the torch train at all for mid-Feb. I think it will be AN but only modestly…seems like guidance has been trending to push systems underneath us as we get closer to that period versus the other way around. To be fair, even modestly AN will feel like a furnace given the previous 3 weeks.

That rotting NAO block combined with loss of cross polar flow sort of just keeps the geopotential gradient lower over the region which may work to our advantage if that rotting block successfully prevents cutters (which it does on this GFS run and various other model runs)…if it’s able to do that, then we could get some decent looks. It’s also the “pre-spring” look…I’m sure you will get what I mean…it’s not quite the full blown spring look with very rapid seasonal recovery south of us…but it’s def not “deep winter” across the CONUS anymore. It’s the r type of loom where we can have -7C 850 ambient temp atmosphere but you are hitting 37-40F during the day. But as soon as a system comes in from the Ohio valley and is forced underneath, that 37-40F turns to snow event in the 20s to near 30F. It’s basically a slightly colder version of the blue bomb look in late March when we’re pimping -1C at 850 with high temps in the 50s, but as soon as a bowling ball hits that airmass, it’s 32F and parachutes.