psuhoffman

I’m holding out for 100”

Euro weekly control thinks we do ok

But it’s setting up a blizzard day 17 if you extrapolate. I actually hope it plays out exactly like that...fail after fail after fail and everyone jumps and then we get a 20” snowstorm Feb 10th.

Can we take shifts. NPZ already put his couch out for his shift...

I don’t know why he posts that one, 3” doesn’t feel very satisfying.

What 750 mile swing? This was the furthest south op run of the gfs this is the furthest south gefs run this is what it’s projected day 3 now that is 200-250 miles at most And this is what the Gefs showed when it was 7 and 8 days out!!! There was only a 24 hour period where some guidance was 200 miles too far south, from 6 days out. Before that it was spot ok. And by 5 days it corrected again back to the correct idea. There was one fluke euro op run that was a crazy anomaly and 1-2 gfs runs over 10 days that deviated from the consensus. The guidance gave me a pretty clear picture of what was going to happen from day 9 on. Plus you have to inject climo knowledge and history to the nwp output. If a couple fluke op runs over 10 days fooled anyone that’s operator error not a tool malfunction.

If the gfs slows down anymore this could become a white Christmas threat

Are his expectations really that high or is it just an excuse to espouse his belief that NWP intentionally shows every permutation despite the fact they are run by different agencies some public some private and it would take a tin foil hat level conspiracy to believe they are all intentionally not making a good faith effort with each run to be as accurate as possible?

The guidance has been EXCELLENT this year, unless you place unrealistic expectations on the specifics of long range. They have generally nailed the longwave pattern generalities from distance. And inside 5 days when details matter they have been good with those...no major short range busts. But yes if you expect the exact location of a synoptic system to be perfect from day 8 then I suppose they suck. But that would be like cutting any player who can't hit a half court shot every time.

It looks active with multiple waves both in the NS and STJ ejecting off the pac. Some aren’t pure STJ waves, they dive in off the western jet split. But it doesn’t matter to us how they get to the gulf coast. It’s what the do after.

You need to relax with the emotional reactions to op runs at 7+ days. I know telling you that is a waste of time but still... Imo the low point was actually 3-4 days ago. I thought this weekend was a lost cause by then, it just took some people longer to accept that, and the long range improvements were too far out to matter yet. But we have had 72 hours of incremental but consistent improvements both in the day 5-10 and 10-15 pattern. And now there are hints it might even be getting better after. Long range needs to be viewed like some abstract painting done by a drunk 4 year old. The overall ambiance is better now than 2-3 days ago. Our chances to avoid a complete disaster year are a little better today than 3 days ago. When a discreet threat makes it inside day 5 then I will worry about an op run or that specific threats fate. Right now I am taking in the whole longwave pattern picture and it continues to look better each run for several consecutive runs. Continue that and eventually we will be analyzing VV and Fgen to determine who gets the death band. Spoiler Alert: ME....it’s always me.

That look can be suppressive if the ridge in Canada is too far south and or nothing amplifies enough yes. One fail would be all the waves compete and fail to amplify. Then they all slide east under the blocking ridge.

All guidance is consistently showing a pna ridge allowing some of the cold in AK to discharge into the eastern US. This time of year AK cold will do well enough. It’s an ok workable look. But if the euro is onto something...that look there can evolve into a legit very good pattern easily. If that east based NAO ridge continues to build...I am becoming a little less pessimistic about February. But people should keep expectations in check. The goal should be to get a snowy February...not a snowy “winter” at this point. It’s unlikely we’re going to make up for losing 60% of winter. If we do great and revel in it but expecting that is setting up for disappointment.

The bigger issue is the upper low digs too far south and closes off along the gulf coast. That creates a south and even southeast flow ahead of it and slows the system down giving it time to wreck the thermal profile ahead of it. If that upper low was more in sync with the NS and further north it would be ok. Good news is I highly doubt we get a cut off low south of Atlanta.

http://climod2.nrcc.cornell.edu/

Yea you are right... my post earlier was just trying to highlight why I agree with you.

no 1993 was one of the rare examples of a full latitude western coupled PNA/EPO ridge and a full latitude eastern N AMerican Trough that worked out. Got enough of the trough to concentrate and bomb a storm. This isn't quite that because there is a blocking ridge in Canada...kind of a mini mid latitude version I guess. The 50/50 has to vacate as the trough amplifies or else the storm cannot turn the corner. Actually one of the issues here (and this is good because its likely a GFS over amplified bias issue) is how the upper low cuts off and digs so far south...that slows the system down and leaves us with a southerly flow ahead of it for too long...it destroys the airmass and then we don't recover in time. If that upper low was a little more progressive and cuts off over TN instead of along the gulf coast its a win for us. I wasnt trying to dig too deep into analysis of a day 9 storm on an op run though...but actually if we assume the upper low isnt going to cut off down south of Atlanta like that...its probably a snowier outcome for us.

I don't buy it... I doubt that is exactly what the H5 will look like...but if it is...we should do ok.

I agree...but right now that lead wave has very little upper level support and its running into a wall of supression. It has very little chance unless we see some significant changes. Those can still happen its 6 days away. WRT the more amplified day 9/10 option...that GFS solution showed how it can work...just need the thermals to be a couple degrees colder from day 10. That isn't a big adjustment. The track is perfect. The whole setup will likely undergo significant alterations by then. If one of those is "colder" we could do well.

I will say this...I never look at the surface long range until last...if at all...and looking at the upper levels everything went exactly the way i wanted to see...then I looked at the surface and was like...WTF... but its 10 days away so who cares. But I do seriously doubt if we get a 967 low off Ocean City on Feb 1 we rain. The airmass leading in isnt that bad.

This is how we do rainstorms now...lol

LOL...988 in eastern NC, 967 east of Ocean City, 954 off NJ...and we rain. If that actually happens all the bunnies better be hiding...

GFS is a good run imo... verbatim its mostly rain but its a perfect upper and surface track... and its very close with temps...and that is going to be a problem no matter what in this pattern given the true cold air is locked up until we get towards day 15.

regardless of where The 12z GFS ends...this is what I see in the setup.... The only thing that would make this REALLY good...would be if that Canadian ridge were centered further west...that is the one thing that could much this up...if that allows too much return flow ahead of the amplifying system...if the 50/50 departs too fast...that could mess it up...but there is a LOT to like on this setup. And getting that ridge to be a little further west isnt a huge adjustment either...it could trend that way.

this could work on the GFS...the lead wave is squashed but the NS wave that squashed it has amplified enough to leave a lot of cold air and still a decent amount of confluence to our north leading into the next wave...we will see. I shouldn't predict how a run is going to go...never ends well.