ORH_wxman

I don’t have a lot of hope for this system in SNE mostly because of the marginal antecedent airmass (been saying this for days about 2/13), but there’s some sneaky upside if we’re able to thread the needle…very dynamic look.

The best PVA and energy on these 12z solutions is at the base of the southern stream trough so even on these solutions that initially run things well NW, they keep trying to crash everything SE as the system encounters a lot of compression in the flow to the east. GGEM went wild too late in the event after having the primary near ROC, though it was mostly too late for SNE outside of a few inches in the pike region northeastward….but Maine gets epically destroyed. Lol

The snowfall distribution is kind of similar but the evolution is definitely not.

25-burger for Ray on the GFS

GFS does get crunched a bit at the last second to keep it a big paste job N of pike and inland but if that goes further north, it’s almost an inland runner.

GFS is gonna be warm and zonked.

Icon doesn’t phase but it’s still a hugger. Big hit for CNE. SNE does get some snow but not warning snow until you’re north of the pike.

The icon is just fundamentally different than other guidance outside of the Ukie. It completely separates the northern and southern streams. Only ICON and 00z Ukie are doing this. It’s a plausible solution but you’d want to see more support for it.

Can’t keep them down for long. 12z ICON coming out slow today.

I don’t really follow the ICON that much. Its a bit noisy for my liking. I treat it like the other JV models. It’s prob better than the NAVGEM and JMA and those types, but I’d never weight it more than the GGEM or Ukie. It mostly has any use at all because it comes out early so sometimes we can get a better sense of what the gee tal model trends will be on that particular cycle.

Yeah agreed. Faster means we’re getting better phasing with the initial northern stream shortwave which produces those northwest scenarios. We even had a run or two of a pure cutter on the GGEM a couple days ago. Slower means less phasing or at least more delayed phasing even if it’s partial and a further south solution.

Yesterday most people were thinking it would get crunched SE. Now a whole bunch of people yelling congrats to dendrite and powderfreak. Lot of minds on tilt these days. It could honestly go either direction.

Yep. Not a good way to look at it yet. A bunch of people would be crushed if we could see another 12 hours.

Maybe. It’s an unmanned firehose look though. There’s literally huge solutions for almost anyone in New England. 2/13 is mostly gravy imho anyway never expected much out of this but it has a legit chance.

06z eps has a solution for everyone

They retrograde the GOA/Aleutian low nicely and go strong -AO/-NAO in pulses which is nice too see. @Typhoon Tip likes to see it oscillate a bit on magnitude since that is where storminess is most likely.

A nice aspect of todays ensemble runs (both GEFS and EPS) is we’re seeing the GOA low retrograding back west at the end of the run. This is something @brooklynwx99 and I were pondering the last couple days. He had mentioned that it should theoretically retreat given the PAC jet weakening. It’s good to see guidance trying to pick up on that. A window longer than 7-10 days would substantially increase the chances of hitting on a major storm threat.

Not at all. Solutions all over the map including some huge hits.

Aside from the 2/13 threat which is precarious, I do really like the look afterwards in the 2/15-2/20 range. Really poleward ridge with cold antecedent airmass over much of the eastern half of the country. Good setup for something higher end.

Yeah that’s squashed. Ridge axis is decently west though so certainly room for it to improve. Gonna either need more phasing with northern stream or more lagging. This run was the sweet spot to basically crush the whole thing south.

Yeah but it prob had a moisture feed from further south once the storm started developing a legit warm conveyor.

Southern stream is def lagging northern stream so far on this euro run at 120h

Yeah you can get close, but you never see like a 45-50” total from any of those 18-24 hour storms. It’s always a stalled monster like ‘78, or 1888 or Feb ‘69 or Dec 1992 (higher terrain). That’s why I mentioned to Ray that the “cap” on a shorter duration storm seems to be in that 3 foot range.

Agreed for the most part but he’s correct if you’re looking to go super high end. How many storms over 3 feet are less than 24 hours? Almost none of them. Sure, even blizzard of ‘78 or Feb ‘69 had most of the snow fall in a 24 hour period but those 40”+ totals are prob like 28-35” if it doesn’t keep going and going. Same deal with those 40+ burgers in Mar 2001. Even in an occluded state, if you have spokes of energy rotating around a pseudo-stalled ULL, it can reinvigorate the snow bands…even if not to their peak intensity…which helps add on those additional accumulations that would otherwise hit the 3-foot wall that we often see in other high-end storms that lack duration over 24-30 hours.

Ukie only goes out to 144 on freebie maps but it looks more like the phased solution of northern and southern streams. Prob ptype issues on that look.