40/70 Benchmark

I found some of your old data looking in one of my seasonal outlooks in which I referenced it. Utilizing North Atlantic SSTs During Summer as an NAO Predictor for Cold Season Perhaps one of the most skilled forecasters on a forum replete with talented meteorologists and hobbyists alike, in americanwx.com, "StormchaserChuck", now known as "UniversesBelowNormal", devised a formula over a decade ago that predicts the mean aggregate state of the NAO for the ensuing winter using the SSTs in an area of the north Atlantic. This methodology is strongly endorsed as one of the more accurate predictors available for the mean state of the winter NAO. In fact, had Eastern Mass Weather considered it last season, the outlook would have been much more successful. The following methodology is a wonderful illustration of the delayed feedback between sea and air that represents the very essence of the elaborate system of atmospheric oscillations that is so often referenced. "In 2006 on a site called easternuswx, elaborate research was done with North Atlantic SSTs, showing high lagging predictive value for following Winter's NAO/AO. The correlation factor was higher than 0.4, and there was advantage over decadal cycles. Meaning, it would predict years that reversed the decadal trend. The index was very accurate in predicting the +NAO for the 2006-2007 Winter, and got much attention after a topic called "This will be the warmest Winter on record for the US" (It was the 7th warmest). Since then the index has performed wonderfully after the fact: 2018-19: +NAO signal/+NAO winter....Verified 2017-18: Strong -NAO signal/+NAO Winter....Failure to Verify 2016-17: Strong - NAO signal/ Weak -NAO Winter .. Verified 2015-16: +NAO signal/ +NAO Winter ... Verified 2014-15: Strong - NAO signal / +NAO Winter ... Failure to Verify 2013-14: Strong +NAO signal / +NAO Winter ... Verified 2012-13: slight -NAO signal / strong -NAO Winter ... Verified 2011-2012 neutral NAO signal / +NAO Winter ... Null 2010-2011: Strong -NAO signal/ Strong -NAO Winter ... Verified 2009-2010: Strong -NAO signal / Strong - NAO Winter ... Verified 2008-2009: weak -NAO signal / weak -NAO Winter ... Verified 2007-2008: -NAO signal / +NAO Winter ... Failure to Verify 2006-2007: +NAO signal / weak +NAO Winter ... Verified 2005-2006: strong +NAO signal / +NAO Winter ... Verified

Also on my short list.

Regardless of what the ONI implies, it will not be weak.

Not on my agenda, no

Exactly what I have been getting at....much like mathamatics, its not about the final solution but hot it is arrived at that matters.

Someone needs to mess with this quote...I almost want to do it myself.

I am pretty confident we are in a fairly devastating several weeks as a nation due to tropical impacts....just for @ineedsnowI have been hard on him...gotta throw that dog a weenie.

What little I have looked at for this next system is pretty ominous for SE US...gonna be either a se US hit or OTS.

I haven't looked at this next system really yet...I'm doing some polar domain stuff for the winter right now, but will be shifting gears shortly. Gonna be a busy week coming up...heavy, heavy blogs.

Yea, I remember the exchange....we said it wasn't of interest because it was either OTS, or up the coast via an inland route....just so happens that it ended up being the latter. The point was that there was no scenario on the table that had the system being pulled up quickly just off of the coast. And this was correct...I'm not sure what he is trying to claim.

Seasons with a large discrepancy between the ONI and RONI underscrore the importance of looking at the hemispheric landscape beyond ENSO.

Yup. High up on my list.

I know what you meant, I was just adding to it.

Those years arrive at those RONI values in a far different manner, though.

Yes and that is the part I am most hopefully about changing this season. I don't expect the hemisphere to be much different.

Absolutely. This is why the lower MEI and RONI relative to the ONI were actually symbolic of a fatal hemispheric issue for NE winter enthusiasts last season.

What I didn't understand was that last year, the weaker coupling of El Nino with the atmosphere was merely a reflection of the very prevalent cool ENSO background, which was/is evident by the west PAC being ablaze. This made the positioning of the el Nino (Modoki scale) largely irrelevent because the forcing was pinned to the MC, regardless. However, in years like 1965 and 1957 and 2009, since we didn't have the west PAC inferno, the weaker coupling of el Nino to the atmosphere was indeed indicative of a weaker warm ENSO walker cell, which truely was more redolent of a modoki and thus favorable for NE cold and snow. What it comes down to is we must not only determine the intensity of El Nino, but if it is weaker, WHY is it weaker.....figure out which other players in the atmosphere are competing with it, how much proxy they will have and how the assertion of said factors will manifest in the configuration of the overall pattern around the hemisphere. The other major players on the field in 2009 and 1957 were an exceptionably favorable extra tropical Pacific and arctic/atlantic. 1965 featured a very favorable arctic/atlantic, which was more helpful to NE cold/snow interests in the face of a hostile extra tropicl Pacific without the immense degree of west PAC warmth. We have been far too reductive in our analysis of ENSO and the changing climate is exposing that more than ever before. Bluewave has been ahead of his time amongst mainstream meteorological circles.

Yes, I correctly pointed out all of that in last season's outlook, complete with schematics, but again....totally screwed the pooch on what impact it would have. Frustratingly educational.

Gonna preface this with the disclosure that I understand that dews and probably heat are not done with us yet, but this AM was a refreshing first harbinger of fall. Solar max is over this weekend and the heat doesn't have quite the same bite when Australian tushies begin to grill on car seats. 52.5 for the low.

I think that likely reality is much more widely accepted this season. But who knows....get an active N stream with a fortuitously timed Aleutian boner and we could steal some thunder, however fleeting it may be.

I misunderstood the implications of this last year, but I won't make that same mistake again this season.....my forecast will be off because I'll make some other assortment of mistakes.

I think the ONI lagging maybe at least partially attributable to the SOI disconnect (residual from strong El Nino), which causes that particular metric to underestimate the intensity of the cool ENSO Walker cell.....much like what was observed last season when the west PAC warm pool maked the intensity of the El Nino.

I will take an active N branch over a strong STJ any day of the week in my neck of the woods. I undersrand that its different not too far to my south and that temps are still likely to be an issue this year.

Thank you. I am still bitter about how things ended at Eastern and how the forum and everything on it is not in accessible.

So obvious guidance had backed off too much on La Nina, just like it had at this point last year with respect to el Nino. I still feel good about my ENSO peak expectations.