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Long Range Discussion 23.0

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Post by Frank_Wx Tue Jan 18, 2022 3:23 pm

Here's an older post from 3 days ago. Still applies today to start off this thread. Please keep discussions related to this weekend in the other thread.

Frank_Wx wrote:The next two storm threats are planned for the 22nd-23rd and 25th-27th.

January 23rd:

This one had the appearance of a potentially big system, but over the last 48 hours we have seen this threat fizzle just a little bit. Below is a look at the GFS upper air map valid for Friday the 21st. You can clearly see a trough and associated energy entering the eastern CONUS, but the trough is positively tilted and the energy is a little strung out. There's 2 reasons for that:

1. There's a very strong piece of northern energy that is cutting off over the western U.S., which is bringing the PNA down to negative. This prevents the trough over the east from consolidating the energy at the base and going neutral-negative. There's also another piece of energy over Texas that is being held back. So, we have all this upper energy being held back over western areas of the U.S. which means there's no opportunity for our northern energy to phase.

2. I did not denote it on the map, but if you look in south-central Canada near the Great Lakes we have a ridge rolling east which is also acting to disrupt the trough over the east. That's because just N&W of there we have even more pieces of upper energy coming out of the Pacific. At this time, the AO and NAO are also positive.

The end result is a strung out mess of energy over the east coast, and a surface low positioned well off the coast. So, I am not very enthused about this threat unless we can get the southern short waves over SW CONUS to eject east instead of getting held back. If that happens, and we end up seeing a phase, it could capture the trough and help bring a low up the coast. There's still time for these trends to occur. Let's see what happens over the next 2-3 days.

Long Range Discussion 23.0 23rd

January 25th-1st:

I've mentioned it earlier, but this is the time period I am favoring over the 23rd at this time. By this point, we are seeing some very interesting developments at 500mb.

1). -AO and -NAO return
2). -EPO/+PNA are emerging
3). PV is centered over the Hudson Bay

Remember that ULL I circled in the other graphic in relation to the 23rd storm? Well by the time we get to the 25th, it finally moves out of the southwest U.S. and follows the jet east-northeast. Because of the aforementioned changes aloft, there's a very good chance this southern energy meets up with northern energy to create our next storm. I won't elaborate more beyond this point, but I really do like the upper level picture. Assuming these features do not change (i.e. NAO does not trend back to positive, etc.) then I am excited about a storm.

Long Range Discussion 23.0 26th

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Post by rb924119 Wed Jan 19, 2022 1:30 am

Two things:

First: I’d like to do a postmortem analysis of our last storm, as I’d like to apologize for leading us astray with that in the closing day or two. No excuse for my errors, regardless of how busy I am. In hindsight, I should have seen it once that secondary vort max became a major player. So, I’d like to do a relatively brief discussion rehashing that so that I/we can all learn from that.

Second: I’d like to do a relatively brief interim update on the status of the long range evolution and how I think we are progressing. Overall, I am very happy with where we are, and where we are going over the next 2-3 weeks. My focus will be on once we get into February and beyond. From early musings, I think that my original ideas still look really, really good, but I should have some time to look more closely and give a full discussion. I know the models are trying to retrograde our pattern a bit as we get into the start of next month, and it fits the factors that I’m looking at. However, those same factors are also indicating that this should NOT be a complete reversal of the pattern again, but more of an intermission. Although the pattern won’t be completely progressive, for our intents and purposes, I think it will be, with alternating flow patterns that leave us near average in the temperature department. I think this intermission lasts one to two weeks (two weeks maximum) before winter returns for round two which should bring us to near the start of March. We may relax the pattern again to open March, but then I think we go out swinging after that into the end of March. Again, preliminary thoughts here, but overall I like what I’m seeing in the extended, and I think the ideas originally presented for this season’s evolution largely remain on track, and the idea of staying “pretty much locked in through the remainder of winter with only limited warmth” is right on track.

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Post by Radz Wed Jan 19, 2022 6:41 am

One cutter, one slider, let’s get a BM track for the end of month storm…
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Post by heehaw453 Wed Jan 19, 2022 1:11 pm

Outside of tomorrow's minor event IMO there just isn't a whole lot to be excited about for the next 7 days or so. Around the 26/27th or so there could be a potential storm as a trough swings through and a nice ridge is behind it, but that's just too far out for any credibility.

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Post by amugs Wed Jan 19, 2022 2:24 pm

Here is the sucker look - who wants to ride this one??

Long Range Discussion 23.0 Index.png.d99a58cf144385576947f1204b99b2d3

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Post by phil155 Wed Jan 19, 2022 2:34 pm

amugs wrote:Here is the sucker look - who wants  to ride this one??

Long Range Discussion 23.0 Index.png.d99a58cf144385576947f1204b99b2d3


It almost feels like the models are toying with us, trying to get hopes up only to crush that hope in the end Sad

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Post by heehaw453 Wed Jan 19, 2022 2:55 pm

amugs wrote:Here is the sucker look - who wants  to ride this one??

Long Range Discussion 23.0 Index.png.d99a58cf144385576947f1204b99b2d3

GEFS H5 is of interest for this time period too.

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Post by lglickman1 Wed Jan 19, 2022 3:13 pm

heehaw453 wrote:
amugs wrote:Here is the sucker look - who wants  to ride this one??

Long Range Discussion 23.0 Index.png.d99a58cf144385576947f1204b99b2d3

GEFS H5 is of interest for this time period too.  

This is for the 26th?

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Post by heehaw453 Wed Jan 19, 2022 3:34 pm

lglickman1 wrote:
heehaw453 wrote:
amugs wrote:Here is the sucker look - who wants  to ride this one??

Long Range Discussion 23.0 Index.png.d99a58cf144385576947f1204b99b2d3

GEFS H5 is of interest for this time period too.  

This is for the 26th?

Yep, in that general time frame of 26/27.

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Post by SENJsnowman Wed Jan 19, 2022 3:57 pm

Just speaking for myself, and I’ve said this a few times on this board:
The thrill is in the hunt!!!! Got something to track for next week- I’m ready to roll! I Just can’t help it and I actually just love the moments of optimism, no matter how much the optimism crashes (every time 😭).

Again, speaking only for myself and I imagine that’s subject to change over time…but for now if there is at least one model to track (track, not hug) then ima be at the front of the line, every time. As an example, from December 1 - March 15, I pretty much check the Board first thing when I wake up, right before I go to sleep and several to several dozen times throughout each day depending how active it is that day. Without a looming threat, probably about 10-15 minutes a day tops. Within 5-6 days of a threat, I really have to monitor my time and make sure to stay productive (and present).

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Post by richb521 Wed Jan 19, 2022 4:40 pm

Is the possible system of the 26-27th the timeframe some board members were thinking had a better chance of coming to fruition than the 22nd-23rd?

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Post by jmanley32 Wed Jan 19, 2022 6:04 pm

SENJsnowman wrote:Just speaking for myself, and I’ve said this a few times on this board:
The thrill is in the hunt!!!!  Got something to track for next week- I’m ready to roll! I Just can’t help it and I actually just love the moments of optimism, no matter how much the optimism crashes (every time 😭).

Again, speaking only for myself and I imagine that’s subject to change over time…but for now if there is at least one model to track (track, not hug) then ima be at the front of the line, every time. As an example, from December 1 - March 15, I pretty much check the Board first thing when I wake up, right before I go to sleep and several to several dozen times throughout each day depending how active it is that day. Without a looming threat, probably about 10-15 minutes a day tops. Within 5-6 days of a threat, I really have to monitor my time and make sure to stay productive (and present).
LOL totally me, refresh refresh refresh lmao
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Post by sroc4 Wed Jan 19, 2022 8:15 pm

richb521 wrote:Is the possible system of the 26-27th the timeframe some board members were thinking had a better chance of coming to fruition than the 22nd-23rd?

I d say this threat has about as much of a chance as this weekends chance had in the same time frame. There is just as many individual pieces of energy coming in at varying times and strengths both on the Atlantic side and pacific side. The one thing that is definitely a positive is there should be plenty of cold air around which is the very first ingredient needed. Just need the pieces to come together. Call it 50/50 at this stage.

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Post by Frank_Wx Wed Jan 19, 2022 8:45 pm

richb521 wrote:Is the possible system of the 26-27th the timeframe some board members were thinking had a better chance of coming to fruition than the 22nd-23rd?

Yes. That time frame (26th-1st) I feel good about for the reasons outlined

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Post by SENJsnowman Thu Jan 20, 2022 12:39 am

jmanley32 wrote:
SENJsnowman wrote:Just speaking for myself, and I’ve said this a few times on this board:
The thrill is in the hunt!!!!  Got something to track for next week- I’m ready to roll! I Just can’t help it and I actually just love the moments of optimism, no matter how much the optimism crashes (every time 😭).

Again, speaking only for myself and I imagine that’s subject to change over time…but for now if there is at least one model to track (track, not hug) then ima be at the front of the line, every time. As an example, from December 1 - March 15, I pretty much check the Board first thing when I wake up, right before I go to sleep and several to several dozen times throughout each day depending how active it is that day. Without a looming threat, probably about 10-15 minutes a day tops. Within 5-6 days of a threat, I really have to monitor my time and make sure to stay productive (and present).
LOL totally me, refresh refresh refresh lmao

OMG...if I can smell even the faintest hint of mothra potential coming my way...

I've wondered to myself on many occasions: Can Frank and the other Mods see how much I sign on and can they see how often I hit 'refresh, refresh, refresh'?! lol But in our defense b/w heehaw, mugsy and Sroc alone, many times the 'refresh, refresh, refresh' method works! lmao

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Post by Frank_Wx Thu Jan 20, 2022 7:25 am

I’ll provide a brief recap of what’s to watch for over the next 7-10 days. Here is the upper level map valid for this Sunday.

Long Range Discussion 23.0 Gfs-ens_z500a_namer_15

Key features:

1. Polar Vortex over the NE quadrant of Hudson Bay
2. Trough over the eastern US
3. Upper level low spinning over SW US
4. Neutral to positive PNA
5. Negative EPO

The key feature to watch is the ULL - “blue blob” - in the SW US. This ULL will gradually move east-northeast early next week and develop a surface low once it crosses the Mississippi. The question becomes can this piece of southern energy phase with anything out of the Pacific/north? Right now I don’t think that will happen but all scenarios on the table. If a phase does not happen, we’re left with a fairly weaker storm system that could bring some wintry weather here on Tuesday. The negative NAO is east based and the flow on the backside of this system is fairly progressive with more short waves entering the country. Therefore, we’ll have to watch how far north the precip gets, and if it gets north, will it be snow? Models are indicating coastal plain may see their heights rise too much ahead of the incoming low. There’s no mechanism to keep the cold in place. But that would change if we see some phasing or a perfectly tracked LP.

The last period of interest will be next Friday all the way to Monday. In one or two of those days, we’ll be watching a potential coastal storm. Because of how active our pattern is with short wave after short wave, models won’t know which one to key in on until we get to mid next week. But, the PV we saw over the Hudson is retreating north and we’re seeing amplification of the PNA ridge. It’s not the greatest upper level map I’ve seen, but it’s intriguing to me because of the PNA/EPO couplet and NAO.

Long Range Discussion 23.0 Gfs-ens_z500a_namer_31

Beyond February 1st I won’t comment because the pattern goes into a state of flux. Literally models are changing their tune run to run.

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Post by mmanisca Thu Jan 20, 2022 7:55 am

Frank_Wx wrote:I’ll provide a brief recap of what’s to watch for over the next 7-10 days. Here is the upper level map valid for this Sunday.

Long Range Discussion 23.0 Gfs-ens_z500a_namer_15

Key features:

1. Polar Vortex over the NE quadrant of Hudson Bay
2. Trough over the eastern US
3. Upper level low spinning over SW US
4. Neutral to positive PNA
5. Negative EPO

The key feature to watch is the ULL - “blue blob” - in the SW US. This ULL will gradually move east-northeast early next week and develop a surface low once it crosses the Mississippi. The question becomes can this piece of southern energy phase with anything out of the Pacific/north? Right now I don’t think that will happen but all scenarios on the table. If a phase does not happen, we’re left with a fairly weaker storm system that could bring some wintry weather here on Tuesday. The negative NAO is east based and the flow on the backside of this system is fairly progressive with more short waves entering the country. Therefore, we’ll have to watch how far north the precip gets, and if it gets north, will it be snow? Models are indicating coastal plain may see their heights rise too much ahead of the incoming low. There’s no mechanism to keep the cold in place. But that would change if we see some phasing or a perfectly tracked LP.

The last period of interest will be next Friday all the way to Monday. In one or two of those days, we’ll be watching a potential coastal storm. Because of how active our pattern is with short wave after short wave, models won’t know which one to key in on until we get to mid next week. But, the PV we saw over the Hudson is retreating north and we’re seeing amplification of the PNA ridge. It’s not the greatest upper level map I’ve seen, but it’s intriguing to me because of the PNA/EPO couplet and NAO.

Long Range Discussion 23.0 Gfs-ens_z500a_namer_31

Beyond February 1st I won’t comment because the pattern goes into a state of flux. Literally models are changing their tune run to run.

Frank nice write up here, thanks for the thouroughness as always.   I do however want to go back to something I said in late December that it seems as though things continued to get pushed back. For the most part the winter has been a dud with the exception of the one storm this month that did give some folks a decent snowfall. You know a lot more than me so I wont go to task with you, but watching weather for so many years I've seen these kind of winters before where theres always something in the future that seems to fade away as we get closer to that time frame. Sometimes seasonal patterns are hard to break, but I hope Im wrong, and will be rooting against my feeling on this!
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Post by Frank_Wx Thu Jan 20, 2022 9:47 am

I mean even I would bet against anything happening. When I say I like the end of month period it doesn’t mean I’m forecasting a snowstorm. The probability %’s I put on the home page of this site should indicate to you my confidence level. You can see they are very low and have mostly been for most of our threats this year.

Just because folks like myself, Ray, etc give some insights into the future, doesn’t mean it’s going to result in endless storms. It is very difficult to get a snowstorm to hit on the coast. All we do is show the pattern trends because obviously you need the cold first before anything else. It’s going to be cold through months end. Whether that coincides with any snow remains to be seen.

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Post by mmanisca Thu Jan 20, 2022 10:00 am

I agree. I think we have been spoiled over recent years with as many favorable snow threats as weve had. Oh I remember in the 60's and 70's there were drought years! (Of course scattered in there wer a few great ones too like the Blizzard of 1978 of which you werent able to enjoy! Im thinking we will get a lot more misses this winter and just have to deal with it. Again you guys do a great job and I totally enjoy the explanation of the atmosphere. I know how much time this consumes!
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Post by MattyICE Thu Jan 20, 2022 10:04 am

I think the potential pattern change that is indicated by some of the longer range guidance could be a good shake up. A few things in this current regime just aren’t lining up as ideally as most of us would have hoped. Too many short waves, East based NAO, weird cut off energy in the SW. Plenty of cold air and vorts around - but highlights Frank’s point about how difficult it can be to get things to come together for most of the board even when a lot of the indices and teleconnections look “good.” I’m in for the potential threats the rest of the month - but I do think a re-shuffle of the pattern might be a good thing to reset us a bit. We’ll see!

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Post by heehaw453 Thu Jan 20, 2022 10:13 am

I think the January 26th ish time frame may be heavily influenced by wave spacing as most of everything over the past several weeks.   I would want to see a more separation of the TPV from the trough at this point though for anything that would excite me.  This maybe a fish storm, but it's close enough for a look.

Long Range Discussion 23.0 Gefs32

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Post by heehaw453 Thu Jan 20, 2022 11:15 am

A bit of a disorganized mess on 12Z GFS, but there is a lot of s/w energy.  That wouldn't take much to blow up.  Just need a slightly more digging trough and that's be a decent storm.

Long Range Discussion 23.0 Gfs57

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Post by heehaw453 Fri Jan 21, 2022 9:40 am

The 1/26 deal has potential but like most things this winter the pieces don't come together for us.  The tpv is on the wrong side of the Hudson Bay and that will interfere with n/s trough.  It will wash the s/s s/w energy right out.  You then get a very weak wave that will be small potatoes if anything.  

The 1/29-1/31 window IMO is a more legit threat.  You have a western ridge that will develop and allow for several n/s s/w's to dive hard on their backside.  But there in lies the problem wave spacing has been killing us this year for threats and I have no reason to believe this will be much different.  I expect a storm to our s/e.

So that is the rest of January IMO a couple more threat windows and I won't be surprised to see us miss out on each of them.  Sure there may be some nickel and dime things, but I don't think we hit the mark.  That being said January has not been too bad as we've all seen a lot worse even if it doesn't snow too much more.

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Post by rb924119 Fri Jan 21, 2022 9:47 am

BEWARE OF THE FEBRUARY TORCH FORECASTS AND DOOM AND GLOOM. Thinking my updated preliminary interim thoughts are looking good after some further analysis this morning. Opening week to 10/12 days of February moderate from what we’ve seen, and will see throughout January (which, let’s be honest, has been a cold month. But, I don’t think we torch during that moderation. I think it’s just that, a moderation that averages near normal on the whole, maybe slightly biased warm (say, -.5 to +1). Peak climo, still workable for snow as long as we time it right (yes, this has been a big ask of late).

After the above stretch, I think winter returns pretty harshly, as we see a renewed Aleutian low/+PNA couplet, possibly gaining enough latitude with the PNA ridge to seed and reorient a new -EPO. This will take us right through the rest of February. With so much cold still available to us, once this pattern evolves, it should be more than enough to offset any early-month positive temperature departure (and then some).

I think March, however, gets tricksy, as we really start to change up atmospheric wavelengths in the Northern Hemisphere (they become shorter), and we will have competing atmospheric evolutions. On the whole, I think the CONUS biases below average temperatures with a “coast to coast” cold pattern. BUT, how we get there, I think, will be a wilddddd ride. I think we are going to see A LOT of west-based Atlantic domain blocking develop beginning in the opening days of the month. As a result, I think we are going to see a lot of “bowling ball” lows amplifying into the West Coast as the Stratosphere will be trying to enhance the Tropospheric trough out there, but the tropical forcing will be trying to enhance it over the central and eastern CONUS. So, I think you can envision how storms will amplify as they come into the West Coast, but then get cut off via repeated cyclonic wave breaking over the central CONUS, which will aid in the maintenance of the west-based Atlantic domain blocking. Now, at this time of year, it may not be a pattern that works exceedingly well for the coast, BUT I think that there will be enough cold air around to certainly make it interesting throughout much of the month (at least the first 2.5-3 weeks) before winter breaks.

Overall, that still aligns very well with my initial seasonal thinking, and I think that least so far, that thinking has been on the right track.

Some notes and asides:

1. With how I see March evolving, I think the southern states will have an early start to the severe weather season Sad

2. Based on early thinking, I think April may turn out to be not so nice overall, as we revert back to a lot of cut-off lows following the pattern relaxation in late March lol but it’s no longer winter at that point, so I really don’t care about that part of the forecast haha

3. I’ll try to get a video or two posted today with further explanations.

rb924119
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Post by rb924119 Fri Jan 21, 2022 9:53 am

heehaw453 wrote:The 1/26 deal has potential but like most things this winter the pieces don't come together for us.  The tpv is on the wrong side of the Hudson Bay and that will interfere with n/s trough.  It will wash the s/s s/w energy right out.  You then get a very weak wave that will be small potatoes if anything.  

The 1/29-1/31 window IMO is a more legit threat.  You have a western ridge that will develop and allow for several n/s s/w's to dive hard on their backside.  But there in lies the problem wave spacing has been killing us this year for threats and I have no reason to believe this will be much different.  I expect a storm to our s/e.

So that is the rest of January IMO a couple more threat windows and I won't be surprised to see us miss out on each of them.  Sure there may be some nickel and dime things, but I don't think we hit the mark.  That being said January has not been too bad as we've all seen a lot worse even if it doesn't snow too much more.

We built the pattern, but you can’t exactly forecast simple bad luck. I must admit that I’m entirely surprised to have not come away with something sizable out of this. We will have had a straight month of a highly favorable overall synoptic alignment with nothing to show for it. Disappointing, for sure, but also fascinating and a perfect example of how fickle the weather, and the forecasting of it, can be.

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