ORH_wxman

Not a bad guess....here is 1970-1989 and 2001-2020 for ORH snowfall through 12/10

Great storms early that month, but the second half of that month was dogshit. Nice cutter right before Xmas too to wipe out any leftover snow.

I'm also not totally convinced how much CC plays a role on these numbers versus just natural variability...you can clearly see there is decade-by-decade noise there. The increase in frequency in 12"+ events is *solely* driven by the 2010s increase. If you look at it from the 1950s-2000s, it is flat. My guess is CC contributes a little bit to the absolute monsters due to increased water vapor, but I think we often overstate the attribution.

I actually ran these numbers a year or two ago and for ORH at least, only "small" events are down....middling events are actually up since the mid-20th century. Here is is in graph form:

What do you think the average snowfall was by 12/10 in ORH in the 1970s/1980s when you were growing up? Just want to see if your memory matches the empirical data.

That was exceptional there. I think the jackpot was near a foot or maybe even a little more and a large area in CT got 6-10”. We didn’t get much this way though which is why I excluded it. I think we had about 2-3”.

That one was incredible down there...some spots had over a foot in 3 hours. I think even the E Wareham coop had just shy of a foot but the jackpot was just west of them.

Actually 2/8/16 may have been one that dropped 4”+ now that I think about it. But that was still over 5 years ago.

IVTs are “rare” in the sense that they are modeled way more than they happen...but they actually aren’t THAT rare in an absolute sense. We probably get at least 1-2 per winter. Usually they are like an inch or two though. The ones that produce >4” of snow are definitely less frequent. I could count those on one hand per decade. We had two big ones in back to back winters in Feb 2013 and Jan 2014 in ORH but not sure we’ve had one since then that I can think of off the top of my head. We’re actually kind of “due”. We had good ones on Feb 22, 2007, Dec 19-20, 2007 and then again on December 20, 2008. Then we had one on 2/3/09 to cap off that great 6 weeks in the 08-09 winter before the pattern changed.

LR guidance has been really bad since about mid November. That said, there's some building consensus on a period of mild weather mid-month. Not set in stone though....GEFS have been kind of stubborn.

Happened in April 1996 too....something about that year 1996, lol....and Dec 19-20, 2008 and Dec 21, 2008. The twin Feb 1994 storms as well.

Monday almost looks like just a FROPA on the EPS. Maybe a hint of a wave. Saturday OTOH looked pretty good for a legit system on the ensembles:

EPS is a lot more bullish for Saturday than the OP and less bullish for Monday.

Yeah that's a big hit for 12/6 on Euro...only 7 more days!

12/6 is going to come in wintry on the Euro this run....prob a redeveloper look.

Euro is a little too flat for 12/4...gets the south coast and Cape with some light snow though. Wouldn't take much though to get a nice stripe over the rest of the region....just need that shortwave a little more robust and not shredded as much in the flow.

Both GFS ad Ukie are in on the Saturday/Sat night event. GGEM isn't biting yet....suppressed and flat.

Yeah you should count 2017...just like I won't count last year. I think "Technically" I had a sloppy inch or two still hanging on at 7am last Christmas amidst 60F downpours but it was gone a couple hours later. I'm not even counting that...lol

The problem is you poo-poo 12" snowfalls in your backyard too....so you end up like the reverse JB....there was never a bust you didn't call.

It's also a good sign that these putrid patterns shown in the long range have gotten muted or better as we get closer. It wasn't long ago that the EPS was slamming us with a mostly lost/torched first week of December. Now we may have a threat or two to track.

Not looking very good. I agree with Chris on the dry air aloft. If all the saturation is below 800mb then it’s tough unless you have like -12C 850 temps and you produce all your dendrites down at that level...we’ve seen that in cold IVT/Norlun events...but we don’t have a profile like that this time. Plus we just don’t have a lot of low level lift....the convergence looks kind of weak. Maybe it will get better but I’d sell anything over some flakes to maybe a coating. Maybe someone on south shore gets a little luckier.

Hi 12z res rgem actually likes near scooter. Over a half inch of liquid equivalent there.

GFS actually shows it too but it’s a lot lighter. More like an inch or two in spots.

Very old school but it’s on page two here http://www.weatheranswer.com/public/NORLUN2.pdf

3k was pretty big too. Need to see some other guidance get in board though. Euro has been extremely paltry which is a red flag.